[Bug regex/751] regecomp can fail with interposed malloc which returns NULL for malloc (0)

[eggert at cs dot ucla.edu]

https://sourceware.org/bugzilla/show_bug.cgi?id=751

eggert at cs dot ucla.edu changed:

           What    |Removed                     |Added
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                 CC|                            |eggert at cs dot ucla.edu

--- Comment #7 from eggert at cs dot ucla.edu ---
(In reply to Adhemerval Zanella from comment #6)
> *** Bug 16851 has been marked as a duplicate of this bug. ***

Following up on this marking of duplication: in bug 16851 Nathan Kennedy
proposed a simple patch for this issue, and I just now commented there that
this is a more general issue that is perhaps best addressed by documenting that
an interposed malloc (0) must return nonnull on success.

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