Homebrew-core: zsh 5.4.2 aborting on some commands

[yuna9]

• [x] brew update up to date
• [x] brew doctor clean
• [x] brew gist-logs zsh gist

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Earlier today, the zsh formula was updated to 5.4.2. (commit, bottles)

After a brew update and brew upgrade today, my zsh was exiting immediately on startup. I tracked the problem down to a line in oh-my-zsh's gitfast plugin.

Running the command above manually with zsh -x, I get the following (gist):

$ printf -v __git_printf_supports_v -- '%s'
<snip>
+zsh:2> printf -v __git_printf_supports_v -- %s
dyld: lazy symbol binding failed: Symbol not found: _open_memstream
  Referenced from: /usr/local/bin/zsh
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _open_memstream
  Referenced from: /usr/local/bin/zsh
  Expected in: /usr/lib/libSystem.B.dylib

[1]    63774 abort      zsh -x

I'm on the latest Command Line Tools for Xcode (9.0) and Xcode (9.0). This occurs whether zsh is poured or built from source.

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Steps to reproduce:

• brew install zsh (version 5.4.2)
• zsh
• printf -v -- '' or printf -v bupkis -- '%s'
• zsh aborts

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If I can provide any additional info, please let me know.

[jballanc]

Just want to echo that I've seen identical behavior, but in my case it was caused by sourceing the git-prompt.sh bash completion script (which also contains a number of calls to printf -v ...).

[ilovezfs]

This should be fixed by https://github.com/Homebrew/homebrew-core/pull/18426.

[yuna9]

Thanks very much for the quick fix! Really appreciate it.

[ilovezfs]

@justinkim you're welcome!