Bug 29351 - Segfaults in glCompileShader since 566430 with clang
Summary: Segfaults in glCompileShader since 566430 with clang
Status: RESOLVED NOTOURBUG
Alias: None
Product: Mesa
Classification: Unclassified
Component: Other (show other bugs)
Version: git
Hardware: x86 (IA32) Linux (All)
: medium critical
Assignee: Cedric Vivier
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Reported: 2010-08-01 22:12 UTC by Cedric Vivier
Modified: 2010-08-03 20:16 UTC (History)
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Description Cedric Vivier 2010-08-01 22:12:00 UTC 
glCompileShader segfaults and/or fails to compile valid shaders with errors like "gl_Position not written in vertex shader".

Bisected first bad commit is 566430, which seems to be the first part of a two-part commit to fix #29305.
Comment 1 Brian Paul 2010-08-02 07:31:56 UTC 
Please try a clean rebuild.
Comment 2 Cedric Vivier 2010-08-02 07:54:26 UTC 
(In reply to comment #1)
> Please try a clean rebuild.

I discussed with Vinson who suggested the same, this made me realize that I was building with clang... as I've been experimenting with it for quite some time without problems I forgot Mesa was built with it on my experimental setup.

So the issue is probably triggered by a Clang bug, or perhaps but very unlikely a gcc bug.

Should I close the bug now as Clang is not supposed to be supported (I think?) or keep it open while I've not yet investigated the real underlying issue ?
Comment 3 Vinson Lee 2010-08-02 11:07:56 UTC 
Cedric,

I'll reassign this bug to you. If you choose to continue investigating and if it turns out that there's something for Mesa, reassign it back to mesa-dev. Otherwise, feel free to close this issue.
Comment 4 Cedric Vivier 2010-08-03 20:16:56 UTC 
Problem is gone with clang-devel (as of rev. 110034).

Closing the bug.

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