1

FML edit: So..... long story short, it was a function I had in my bashrc profile... test() { npm run test $1 $2 $3 $4 ;}; export -f test

But!

How did I track this down, you might ask?

Well, after some digging with iosnoop, I looked up why iosnoop was giving ??'s in paths, which led me to this answer: https://stackoverflow.com/questions/18191708/why-iosnoop-io-snooping-files-on-disk-returns-paths-with-question-marks

which supplied me with this magic command sudo dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }'

That command gives you only the io, read's actually, apparently executes too I believe, of every syscall::open*:entry. I wasn't sure how to single out git, but the process name is quite easily identifiable in the output, so used that command to compare the IO of sudo git submodule and git submodule

And the results were as follows:

# git submodule
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  2    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  2    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  2    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x10b832652) in action #2 at DIF offset 12
  2    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  2    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  2    957              open_nocancel:entry git .
  2    957              open_nocancel:entry git /usr/local/etc/gitconfig
  0    171                       open:entry sh /dev/dtracehelper
  4    171                       open:entry sh /dev/tty
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-submodule
  2    171                       open:entry basename /dev/dtracehelper
  4    171                       open:entry sed /dev/dtracehelper
  2    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  2    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_TIME
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-setup
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  4    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  4    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  4    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x10f47f652) in action #2 at DIF offset 12
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-i18n
  0    957              open_nocancel:entry ReportCrash /bin
sudo git submodule
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  2    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  2    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  2    171                       open:entry git /dev/dtracehelper
  6    957              open_nocancel:entry git /etc/master.passwd
  4    171                       open:entry git /dev/autofs_nowait
  4    171                       open:entry git /var/root/.CFUserTextEncoding
  4    957              open_nocancel:entry git /etc/master.passwd
  4    171                       open:entry git /dev/autofs_nowait
  4    171                       open:entry git /var/root/.CFUserTextEncoding
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x107dd7652) in action #2 at DIF offset 12
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry git .
  4    957              open_nocancel:entry git /usr/local/etc/gitconfig
  0    171                       open:entry sh /dev/dtracehelper
  4    171                       open:entry sh /dev/tty
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    957              open_nocancel:entry sh .
  4    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-submodule
  4    171                       open:entry basename /dev/dtracehelper
  2    171                       open:entry sed /dev/dtracehelper
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-setup
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  0    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  0    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  0    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x10af1c652) in action #2 at DIF offset 12
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  2    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-i18n
  2    171                       open:entry sh /dev/null
  2    171                       open:entry sh /opt/local/bin/gettext.sh
  0    171                       open:entry sh /dev/null
  0    171                       open:entry sh /dev/null
  4    171                       open:entry basename /dev/dtracehelper
  2    171                       open:entry sed /dev/dtracehelper
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_TIME
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    957              open_nocancel:entry taskgated /opt/local/bin
  2    957              open_nocancel:entry taskgated /opt/local/bin
  2    171                       open:entry taskgated /opt/local/bin/gettext
  2    171                       open:entry gettext /opt/local/lib/libintl.8.dylib
  2    171                       open:entry gettext /opt/local/lib/libiconv.2.dylib
  2    171                       open:entry gettext /dev/dtracehelper
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    171                       open:entry taskgated /opt/local/bin/envsubst
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  6    171                       open:entry envsubst /opt/local/lib/libintl.8.dylib
  4    957              open_nocancel:entry gettext /opt/local/share/locale/locale.alias
  6    171                       open:entry envsubst /opt/local/lib/libiconv.2.dylib
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en_AU.UTF-8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en_AU.utf8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en_AU/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en.UTF-8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en.utf8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en/LC_MESSAGES/git.mo
  6    171                       open:entry envsubst /dev/dtracehelper
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    171                       open:entry taskgated /opt/local/bin/envsubst
  6    171                       open:entry envsubst /opt/local/lib/libintl.8.dylib
  6    171                       open:entry envsubst /opt/local/lib/libiconv.2.dylib
  6    171                       open:entry envsubst /dev/dtracehelper
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_TIME
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    171                       open:entry uname /dev/dtracehelper
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  0    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  0    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  0    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x101b2d652) in action #2 at DIF offset 12
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    957              open_nocancel:entry git .
  0    957              open_nocancel:entry git /usr/local/Cellar/gettext/0.19.8.1/share/locale/locale.alias
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en_AU.UTF-8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en_AU.utf8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en_AU/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en.UTF-8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en.utf8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en/LC_MESSAGES/git.mo

This let me compare line by line the IOps of each command, leading to the very clear branch point of the command 2 171 open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-i18n

so I nano'd into ??/git-sh-i18n and added some echo "debug n" lines to figure out where the segfault was occuring

It turned out it was occuring at a test -z line, and the reason it didn't crash with sudo git submodule is because sudo opens a new shell.

so...

yeah.... for future reference.......... this is the only google search result for error: git-submodule died of signal 11

But hey, I didn't need those 10 hours of lifetime

Edit: So I found out that running sudo git submodule works, so it's a permission error, I did a dtruss trace which you can read here, https://pastebin.com/k1qNCsTY

But I have no idea how dtruss works so I can't figure out which fs object is being accesses with the wrong permissions, it looks like it tries to access 1477/0x3e98: write_nocancel(0x1, "/usr/local/Cellar/git/2.21.0/libexec/git-core\n\b\0", 0x2E) = 46 0 right before the error 1471/0x3e8b: write_nocancel(0x2, "error: git-submodule died of signal 11\n\0", 0x27) = 39 0 is thrown, but I don't know what write_nocancel means,

It turns out that git-submodule resides inside libexec/git-core and the permissions are

lopu@lopu-pro:~/tmp/test2$ ls -l /usr/local/Cellar/git/2.21.0/libexec/git-core/ | grep submodule -rwxr-xr-x 1 lopu admin 23373 25 Feb 03:31 git-submodule

on my computer

End edit.

I've got a super weird problem occurring as of yesterday.

Software specs are

OS: OS X 10.13.4

Git: 2.21.0

Node: 10.15.3

npm: 6.4.1

perl: 5.18.2

What I'm running into is an issue where running git submodule update anywhere in my system returns the error error: git-submodule died of signal 11

I found out about this error when I tried to install an npm module from a git repository url

for example

mkdir test ; cd test ; npm init -y
npm i lopugit/test# https://github.com/lopugit/test if you want to take a look, literally an empty npm package

for me, this brings up

lopu@lopu-pro:~/tmp/test2$ npm i lopugit/test
npm ERR! code 139
npm ERR! Command failed: /usr/local/bin/git submodule update -q --init --recursive
npm ERR! error: git-submodule died of signal 11
npm ERR!

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/lopu/.npm/_logs/2019-03-31T10_48_41_525Z-debug.log
# /Users/lopu/.npm/_logs/2019-03-31T10_48_41_525Z-debug.log
0 info it worked if it ends with ok
1 verbose cli [ '/Users/lopu/.nvm/versions/node/v10.15.3/bin/node',
1 verbose cli   '/Users/lopu/.nvm/versions/node/v10.15.3/bin/npm',
1 verbose cli   'i',
1 verbose cli   'lopugit/test' ]
2 info using npm@6.4.1
3 info using node@v10.15.3
4 verbose npm-session 24a6679416e47473
5 silly install loadCurrentTree
6 silly install readLocalPackageData
7 silly fetchPackageMetaData error for github:lopugit/test Command failed: /usr/local/bin/git submodule update -q --init --recursive
7 silly fetchPackageMetaData error: git-submodule died of signal 11
8 timing stage:rollbackFailedOptional Completed in 1ms
9 timing stage:runTopLevelLifecycles Completed in 2532ms
10 verbose stack Error: Command failed: /usr/local/bin/git submodule update -q --init --recursive
10 verbose stack error: git-submodule died of signal 11
10 verbose stack
10 verbose stack     at ChildProcess.exithandler (child_process.js:294:12)
10 verbose stack     at ChildProcess.emit (events.js:189:13)
10 verbose stack     at maybeClose (internal/child_process.js:970:16)
10 verbose stack     at Socket.stream.socket.on (internal/child_process.js:389:11)
10 verbose stack     at Socket.emit (events.js:189:13)
10 verbose stack     at Pipe._handle.close (net.js:597:12)
11 verbose cwd /Users/lopu/tmp/test2
12 verbose Darwin 17.5.0
13 verbose argv "/Users/lopu/.nvm/versions/node/v10.15.3/bin/node" "/Users/lopu/.nvm/versions/node/v10.15.3/bin/npm" "i" "lopugit/test"
14 verbose node v10.15.3
15 verbose npm  v6.4.1
16 error code 139
17 error Command failed: /usr/local/bin/git submodule update -q --init --recursive
17 error error: git-submodule died of signal 11
18 verbose exit [ 1, true ]

I thought maybe it was perl, but on osx you can't update perl, I looked into activeperl, but that would mean changing the perl version that git uses.

Does anyone have any idea what this could be?

I've tried fixing perl with this: sudo perl -MCPAN -e 'CPAN::Shell->notest(install => CPAN::Shell->r)'

and updating xcode via the app store.

The thing that makes me think it's a perl issue is that when I was looking into upgrading perl, I tried installing brewperl, which led me to run this command after installing it

brewperl install-5.18.1

getting this error log file

Auto-guessed '5.18.1'
patching Configure
patching ext/Errno/Errno_pm.PL
sh: line 1:  2709 Segmentation fault: 11  sh Configure -de '-Dprefix=/Users/lopu/perl5/perlbrew/perls/perl-5.18.1' '-A'eval:scriptdir=/Users/lopu/perl5/perlbrew/perls/perl-5.18.1/bin''
##### Brew Failed #####

I also did a dtruss trace and got this

https://pastebin.com/k1qNCsTY

breaches the 30000 superuser character limit

holy shit running as sudo makes it work, must be a permission issue.....

0

Long story short, it was the following function I had in my .bashrc profile:

test() { npm run test $1 $2 $3 $4 ;}; export -f test

But!

How did I track this down, you might ask?

Well, after some digging with iosnoop, I looked up why iosnoop was giving ??'s in paths, which led me to this answer: https://stackoverflow.com/questions/18191708/why-iosnoop-io-snooping-files-on-disk-returns-paths-with-question-marks

which supplied me with this magic command sudo dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }'

That command gives you only the io, read's actually, apparently executes too I believe, of every syscall::open*:entry. I wasn't sure how to single out git, but the process name is quite easily identifiable in the output, so used that command to compare the IO of sudo git submodule and git submodule

And the results were as follows:

# git submodule
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  2    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  2    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  2    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x10b832652) in action #2 at DIF offset 12
  2    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  2    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  2    957              open_nocancel:entry git .
  2    957              open_nocancel:entry git /usr/local/etc/gitconfig
  0    171                       open:entry sh /dev/dtracehelper
  4    171                       open:entry sh /dev/tty
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-submodule
  2    171                       open:entry basename /dev/dtracehelper
  4    171                       open:entry sed /dev/dtracehelper
  2    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  2    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_TIME
  1    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-setup
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  4    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  4    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  4    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x10f47f652) in action #2 at DIF offset 12
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-i18n
  0    957              open_nocancel:entry ReportCrash /bin
sudo git submodule
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  2    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  2    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  2    171                       open:entry git /dev/dtracehelper
  6    957              open_nocancel:entry git /etc/master.passwd
  4    171                       open:entry git /dev/autofs_nowait
  4    171                       open:entry git /var/root/.CFUserTextEncoding
  4    957              open_nocancel:entry git /etc/master.passwd
  4    171                       open:entry git /dev/autofs_nowait
  4    171                       open:entry git /var/root/.CFUserTextEncoding
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x107dd7652) in action #2 at DIF offset 12
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry git .
  4    957              open_nocancel:entry git /usr/local/etc/gitconfig
  0    171                       open:entry sh /dev/dtracehelper
  4    171                       open:entry sh /dev/tty
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry sh /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    957              open_nocancel:entry sh .
  4    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-submodule
  4    171                       open:entry basename /dev/dtracehelper
  2    171                       open:entry sed /dev/dtracehelper
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  4    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-setup
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  2    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  0    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  0    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  0    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x10af1c652) in action #2 at DIF offset 12
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  2    171                       open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-i18n
  2    171                       open:entry sh /dev/null
  2    171                       open:entry sh /opt/local/bin/gettext.sh
  0    171                       open:entry sh /dev/null
  0    171                       open:entry sh /dev/null
  4    171                       open:entry basename /dev/dtracehelper
  2    171                       open:entry sed /dev/dtracehelper
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_TIME
  6    957              open_nocancel:entry sed /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    957              open_nocancel:entry taskgated /opt/local/bin
  2    957              open_nocancel:entry taskgated /opt/local/bin
  2    171                       open:entry taskgated /opt/local/bin/gettext
  2    171                       open:entry gettext /opt/local/lib/libintl.8.dylib
  2    171                       open:entry gettext /opt/local/lib/libiconv.2.dylib
  2    171                       open:entry gettext /dev/dtracehelper
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    171                       open:entry taskgated /opt/local/bin/envsubst
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry gettext /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  6    171                       open:entry envsubst /opt/local/lib/libintl.8.dylib
  4    957              open_nocancel:entry gettext /opt/local/share/locale/locale.alias
  6    171                       open:entry envsubst /opt/local/lib/libiconv.2.dylib
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en_AU.UTF-8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en_AU.utf8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en_AU/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en.UTF-8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en.utf8/LC_MESSAGES/git.mo
  4    171                       open:entry gettext /usr/local/Cellar/git/2.21.0/share/locale/en/LC_MESSAGES/git.mo
  6    171                       open:entry envsubst /dev/dtracehelper
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_TIME
  4    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    957              open_nocancel:entry taskgated /opt/local/bin
  0    171                       open:entry taskgated /opt/local/bin/envsubst
  6    171                       open:entry envsubst /opt/local/lib/libintl.8.dylib
  6    171                       open:entry envsubst /opt/local/lib/libiconv.2.dylib
  6    171                       open:entry envsubst /dev/dtracehelper
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_TIME
  6    957              open_nocancel:entry envsubst /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  2    171                       open:entry uname /dev/dtracehelper
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_COLLATE
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_MONETARY
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_NUMERIC
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry uname /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    957              open_nocancel:entry taskgated /usr/local/Cellar/git/2.21.0/bin
  0    171                       open:entry taskgated /usr/local/Cellar/git/2.21.0/bin/git
  0    171                       open:entry git /usr/local/opt/pcre2/lib/libpcre2-8.0.dylib
  0    171                       open:entry git /usr/local/opt/gettext/lib/libintl.8.dylib
  0    171                       open:entry git /dev/dtracehelper
dtrace: error on enabled probe ID 7 (ID 171: syscall::open:entry): invalid address (0x101b2d652) in action #2 at DIF offset 12
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_MESSAGES/LC_MESSAGES
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_TIME
  0    957              open_nocancel:entry git /usr/share/locale/en_AU.UTF-8/LC_CTYPE
  0    957              open_nocancel:entry git .
  0    957              open_nocancel:entry git /usr/local/Cellar/gettext/0.19.8.1/share/locale/locale.alias
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en_AU.UTF-8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en_AU.utf8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en_AU/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en.UTF-8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en.utf8/LC_MESSAGES/git.mo
  0    171                       open:entry git /usr/local/Cellar/git/2.21.0/share/locale/en/LC_MESSAGES/git.mo

This let me compare line by line the IOps of each command, leading to the very clear branch point of the command 2 171 open:entry sh /usr/local/Cellar/git/2.21.0/libexec/git-core/git-sh-i18n

so I nano'd into ??/git-sh-i18n and added some echo "debug n" lines to figure out where the segfault was occuring

It turned out it was occuring at a test -z line, and the reason it didn't crash with sudo git submodule is because sudo opens a new shell.

so...

yeah.... for future reference.......... this is the only google search result for error: git-submodule died of signal 11

But hey, I didn't need those 10 hours of lifetime

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