[Bug c/64439] Incorrect location of -Wunused-value or false negative

["manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64439

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu.org

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
It doesn't seem a false negative to me. 

It is a bit strange that we get different locations for equivalent expressions:

s.c:2:17: warning: value computed is not used [-Wunused-value]
   a && ((b = 0) != 0); 
                 ^
s.c:3:18: warning: value computed is not used [-Wunused-value]
   ((b = 0) != 0) && a;
                  ^

But I'm not sure if it is a bug. Someone would need to look at gcc while
compiling the testcase under a debugger to understand why the difference exists
at all.
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From: "dark_footix at yahoo dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug regression/64437] hang with iconv on the configure : "checking whether the C compiler works"
Date: Mon, 29 Dec 2014 23:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd437

fredm <dark_footix at yahoo dot fr> changed:

           What    |Removed                     |Added
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             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID

--- Comment #5 from fredm <dark_footix at yahoo dot fr> ---
Sorry, I did a mismatch of pre build lib with my previous toolchain

This bug is closed