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Re: [Qemu-devel] block/stream.c -Werror build failure

From: Stefan Weil
Subject: Re: [Qemu-devel] block/stream.c -Werror build failure
Date: Thu, 19 Sep 2013 18:59:01 +0200
User-agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130803 Thunderbird/17.0.8

Am 19.09.2013 18:52, schrieb Andreas Färber:
> Hello,
> As reported yesterday on IRC, since the last round of pulls I am getting
> the following warning-treated-as-error:
>   CC    block/stream.o
> /home/andreas/QEMU/qemu/block/stream.c: In function ‘stream_run’:
> /home/andreas/QEMU/qemu/block/stream.c:111:14: error: ‘copy’ may be used
> uninitialized in this function [-Werror=maybe-uninitialized]
> cc1: all warnings being treated as errors
> make: *** [block/stream.o] Fehler 1
> $ gcc --version
> gcc (SUSE Linux) 4.7.2 20130108 [gcc-4_7-branch revision 195012]
> However I only got this in 1 of 2 repositories I tried. It turns out
> that --enable-debug avoids this build issue.
> The stream.c code itself looks okay to me. In the case of ret >= 0, copy
> is always assigned, including the goto code path.
> Still, could we initialize the copy variable to false or revert whatever
> change introduced this build regression? (-Wextra?)
> Regards,
> Andreas

This will be fixed by the next pull request for the block tree.
See also http://patchwork.ozlabs.org/patch/275503/


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