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Re: Crash on tab completion

X-seq: zsh-workers 39184
From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: Zsh hackers list <zsh-workers@xxxxxxx>
Subject: Re: Crash on tab completion
Date: Mon, 5 Sep 2016 10:18:57 -0700
Cc: Patrick Hilhorst <patrickhilhorst97@xxxxxxxxx>
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On Mon, Sep 5, 2016 at 3:42 AM, Patrick Hilhorst
<patrickhilhorst97@xxxxxxxxx> wrote:
> Hello all,
>
> I recently made a typo in my .zshrc that caused tab complete to crash zsh:
>
> alias cpp_check="clang-tidy
> -checks=\"-*,cppcoreguidelines-*,clang-analyzer-*,misc-*,modernize-*,performance-*,readability-*"
>
> I presume this is because it tries to expand all asterisks. If any more
> documentation is required, you can reach me at this address, since I’m not
> subscribed to this mailing list.

% cpp_check  zle_tricky.c:658: BUG: 0 <= wb (-86) <= zlemetacs (9) <=
we (9) is not true!
BUG: substring ends in the middle of a metachar in ztrsub()

The "BUG: substring ..." line repeats 16 times and then zsh crashes.
Happens with the latest build from the repository.  Doesn't have
anything to do with the glob characters, it's all because of the
un-terminated double-quote in the expansion of the alias.  Also
crashes when compsys is NOT loaded, but without ever printing the
second BUG: line.  Seems to be because wb is computed with the alias
expanded, but then the alias is unwound before trying to update the
command line.

Follow-Ups:
- Re: Crash on tab completion
  - From: Peter Stephenson

References:
- Crash on tab completion
  - From: Patrick Hilhorst

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