Bug 494796 (PR58800)

Summary:	[4.8] std::nth_element segfaults (dev-cpp/eigen)
Product:	Gentoo Linux	Reporter:	Ryan Hill (RETIRED) <rhill>
Component:	[OLD] Core system	Assignee:	Gentoo Toolchain Maintainers <toolchain>
Status:	RESOLVED FIXED
Severity:	normal	CC:	alunduil, dlan, kde, ph03
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://gcc.gnu.org/PR58800
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	491796
Attachments:	patch file

Description Ryan Hill (RETIRED) gentoo-dev

2013-12-20 04:49:44 UTC

+++ This bug was initially created as a clone of Bug #491796 +++

Comment 1 Yixun Lan archtester

2013-12-20 10:00:13 UTC

Created attachment 365744 [details]
patch file

just report back here, I've tried following patch (which is already in upstream's gcc-4.8 branch). and compile eigen-3.2.0 with USE=doc, just fine.

Thanks for tackling down this.

http://gcc.gnu.org/git/?p=gcc.git;a=commit;h=2504715442db6134015d01fa1f8bf20f194da476

(share the patch here if anyone willing to test, with following commands)
$ mkdir -p /etc/portage/patches/sys-devel/gcc-4.8.2/
$ cp 01-gcc-4.8-stl_algo.patch /etc/portage/patches/sys-devel/gcc-4.8.2/

Comment 2 Ryan Hill (RETIRED) gentoo-dev

2013-12-21 05:25:20 UTC

Thanks for testing.

http://sources.gentoo.org/viewcvs.py/gentoo/src/patchsets/gcc/4.8.2/gentoo/91_all_pr58800_nth_element-segfault.patch?rev=1.1&view=markup

Comment 3 Ryan Hill (RETIRED) gentoo-dev

2013-12-23 21:36:06 UTC

Fixed in 4.8.2 p1.1.  USE flag changes will trigger a rebuild for everyone.