--- Comment #24 from thomas at archlinux dot org 2010-05-21 08:16 ---
Preliminary tests with a recent gcc snapshot from the 4.5 branch shows that the
problem is entirely solved by this patch (maybe in combination with other
fixes).
Thanks for the quick responses and fixes.
--
http
--- Comment #17 from thomas at archlinux dot org 2010-05-05 14:10 ---
> I have a patch. Workaround for 4.5.0: -fno-pta.
There is no -fno-pta option in 4.5.0, but I can confirm that -fno-tree-pta
fixes the problem in the testcase and in busybox.
--
http://gcc.gnu.org/bugzi
--- Comment #11 from thomas at archlinux dot org 2010-05-05 11:57 ---
The problem persists with the 4.5-20100429 snapshot.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43987
--- Comment #10 from thomas at archlinux dot org 2010-05-05 10:58 ---
(In reply to comment #8)
> Waiting for a testcase (which could be just preprocessed source of
> sed.c).
Attached. If I find a better (shorter) test case, I'll add that too.
> Can you reproduce the issu
--- Comment #9 from thomas at archlinux dot org 2010-05-05 10:53 ---
Created an attachment (id=20561)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20561&action=view)
Preprocessor output of sed.c
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43987
--- Comment #7 from thomas at archlinux dot org 2010-05-05 07:23 ---
It has its own file:
http://git.busybox.net/busybox/tree/libbb/xrealloc_vector.c?h=1_16_stable&id=1_16_1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43987
--- Comment #5 from thomas at archlinux dot org 2010-05-04 23:49 ---
I am still not able to produce a short test case, but maybe this will help:
http://git.busybox.net/busybox/tree/editors/sed.c?h=1_16_stable&id=1_16_1#n738
In the function add_input_file(), the 'file' arg
--- Comment #3 from thomas at archlinux dot org 2010-05-04 23:06 ---
What is -fwrapv supposed to do? I don't see any changes in behaviour or
compiler output.
As I said, I don't know exactly what to put into a test case (I didn't write
any of the code that breaks), b
on] type-punning causes broken binaries
unless -O0 is used
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
Repor
