Re: Bash-4.2 Official Patch 5

[Allan McRae]

On 01/03/11 11:58, Chet Ramey wrote:
>                         BASH PATCH REPORT
>                              =================
>
> Bash-Release:   4.2
> Patch-ID:       bash42-005
>
> Bug-Reported-by:        Dennis Williamson<dennistwilliamson@gmail.com>
> Bug-Reference-ID:       
> <AANLkTikDbEV5rnbPc0zOfmZfBcg0xGetzLLzK+KjRiNa@mail.gmail.com>
> Bug-Reference-URL:      
> http://lists.gnu.org/archive/html/bug-bash/2011-02/msg00147.html
>
> Bug-Description:
>
> Systems that use tzset() to set the local timezone require the TZ variable
> to be in the environment.  Bash must make sure the environment has been
> modified with any updated value for TZ before calling tzset().  This
> affects prompt string expansions and the `%T' printf conversion specification
> on systems that do not allow bash to supply a replacement for getenv(3).
>
> Patch (apply with `patch -p0'):


This patch just caused some havoc for Arch Linux testing repository 
users who found their systems no longer booted...

Here is one our users findings on the issue:

On 01/03/11 23:57, Evangelos Foutras wrote:
> `unset TZ' is the simplest test case that causes a segmentation fault
> on my system.
>
> The culprit appears to be the chkexport function introduced in patch
> bash42-005 [1]. From the backtrace [2], I gather it should probably
> check that find_variable returns a non-NULL value. Changing the line
> after the find_variable call to read "if (v&&  exported_p (v))" fixes
> the issue for me.


Allan