Re: Clang-built Gawk 5.2.1 regex oddity

[Arsen Arsenović]

Hi,

Paul Eggert <eggert@cs.ucla.edu> writes:

> This is a serious bug in Clang: it generates incorrect machine code.
>
> The code that Clang generates for the following (gawk/support/dfa.c lines
> 1141-1143):
>
>     ((dfa->syntax.dfaopts & DFA_CONFUSING_BRACKETS_ERROR
>       ? dfaerror : dfawarn)
>      (_("character class syntax is [[:space:]], not [:space:]")));
>
> is immediately followed by the code generated for the following
> (gawk/support/dfa.c line 1015):
>
>                     dfaerror (_("invalid character class"));
>
> and this is incorrect because the two source code regions are not connected
> with each other.

This is now fixed in Clang:
https://reviews.llvm.org/rGcf8fd210a35c8e93136cb8edc5c6a2e818dc1b1d

Happy hacking!
-- 
Arsen Arsenović

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