rcsdiff aborts with "Illegal instruction: 4"

[permezel]

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Please always follow these steps:

• [x] Confirmed this is a problem with brew installing one, specific Homebrew/homebrew-core formula (not cask or tap) and not every time you run brew? If it's a general brew problem please file this issue at https://github.com/Homebrew/brew/issues/new. If it's a brew cask problem please file this issue at https://github.com/Homebrew/caskroom/homebrew-cask/new. If it's a tap (e.g. Homebrew/homebrew-php) problem please file this issue at the tap.

$ brew info rcs rcs: stable 5.9.4 (bottled) GNU revision control system https://www.gnu.org/software/rcs/ /usr/local/Cellar/rcs/5.9.4 (27 files, 732.2KB) * Built from source on 2017-09-27 at 12:53:49 From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/rcs.rb

• [x] Ran brew update and retried your prior step?

$ brew update Updated 1 tap (homebrew/core). ==> Updated Formulae snakemake $ brew update Already up-to-date. $ brew reinstall rcs ==> Reinstalling rcs ==> Downloading https://homebrew.bintray.com/bottles/rcs-5.9.4.high_sierra.bottle.1.tar.gz Already downloaded: /Users/nimda/Library/Caches/Homebrew/rcs-5.9.4.high_sierra.bottle.1.tar.gz ==> Pouring rcs-5.9.4.high_sierra.bottle.1.tar.gz 🍺 /usr/local/Cellar/rcs/5.9.4: 27 files, 732.2KB $ rcsdiff Illegal instruction: 4

• [x] Ran brew doctor, fixed all issues and retried your prior step?

$ brew doctor Your system is ready to brew. $ brew update; brew update Already up-to-date. Already up-to-date. $ brew reinstall rcs ==> Reinstalling rcs ==> Downloading https://homebrew.bintray.com/bottles/rcs-5.9.4.high_sierra.bottle.1.tar.gz Already downloaded: /Users/nimda/Library/Caches/Homebrew/rcs-5.9.4.high_sierra.bottle.1.tar.gz ==> Pouring rcs-5.9.4.high_sierra.bottle.1.tar.gz 🍺 /usr/local/Cellar/rcs/5.9.4: 27 files, 732.2KB $ rcsdiff Illegal instruction: 4

• [x] Ran brew gist-logs <formula> (where <formula> is the name of the formula that failed) and included the output link?

$ brew gist-logs rcs https://gist.github.com/db926459d7f197fd78270d64dfa93dd9

• [x] If brew gist-logs didn't work: ran brew config and brew doctor and included their output with your issue?

To help us debug your issue please explain:

• What you were trying to do (and why)

Trying to run rcsdiff against a file. That fails. rcsdiff fails with zero args in the same way. Other rcs-based functions can be made to fail similarly.

• What happened (include command output)

% rcsdiff ts Illegal instruction: 4

• What you expected to happen

I expected the programme to function correctly, not field an illegal instruction trap.

• Step-by-step reproduction instructions (by running brew install commands)

It appears that there is some change in the underlying system library implementation.

$ lldb /usr/local/Cellar/rcs/5.9.4/bin/rcs
(lldb) target create "/usr/local/Cellar/rcs/5.9.4/bin/rcs" Current executable set to '/usr/local/Cellar/rcs/5.9.4/bin/rcs' (x86_64). (lldb) run rcsdiff Process 27057 launched: '/usr/local/Cellar/rcs/5.9.4/bin/rcs' (x86_64) Process 27057 stopped

• thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) frame #0: 0x00007fff53919a23 libsystem_c.dylib__vfprintf + 16437 libsystem_c.dylib__vfprintf: -> 0x7fff53919a23 <+16437>: ud2
  0x7fff53919a25 <+16439>: nopl (%rax) 0x7fff53919a28 <+16442>: retq
  Target 0: (rcs) stopped. (lldb) bt
• thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
  • frame #0: 0x00007fff53919a23 libsystem_c.dylib__vfprintf + 16437 frame #1: 0x00007fff5393e0a9 libsystem_c.dylib__v2printf + 473 frame #2: 0x00007fff539234c7 libsystem_c.dylib_vsnprintf + 415 frame #3: 0x00007fff53923524 libsystem_c.dylibvsnprintf_l + 41 frame #4: 0x00007fff539144ec libsystem_c.dylibsnprintf + 180 frame #5: 0x000000010001bf20 rcsvasnprintf + 3084 frame #6: 0x0000000100019e5c rcsobstack_vprintf + 101 frame #7: 0x000000010000b9c2 rcsaccf + 136 frame #8: 0x000000010000f889 rcsfind_peer_prog + 164 frame #9: 0x00000001000081c4 rcsrcsdiff_main + 1524 frame #10: 0x000000010000ad69 rcsmain + 760 frame #11: 0x00007fff53882145 libdyld.dylibstart + 1 frame #12: 0x00007fff53882145 libdyld.dylib`start + 1 (lldb)

Formula additions or changes

To get formulae added or changed in Homebrew please file a Pull Request We will close issues requesting formulae changes.

[ilovezfs]

This is now fixed if you brew update.

[ilovezfs]

And brew upgrade of course.

[permezel]

Works. Thanks.

On 27 Sep 2017, at 14:52, ilovezfs notifications@github.com wrote:

And brew upgrade of course.

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