Bug 645304

Summary:	media-sound/lilypond-2.18.2 segfaults when built with gcc 6 optimization
Product:	Gentoo Linux	Reporter:	Robert Spillner <trent2>
Component:	Current packages	Assignee:	Tim Harder <radhermit>
Status:	RESOLVED OBSOLETE
Severity:	normal	CC:	karl.j.linden, proxy-maint, scheme
Priority:	Normal	Keywords:	PATCH
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/lilypond/lilypond/commit/b0dce76daf27721ba157cd2ac5d7662d4c8d75f8
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info

Description Robert Spillner 2018-01-21 23:19:15 UTC

Created attachment 515796 [details]
emerge --info

For a more detailed description of this bug, see https://bugzilla.redhat.com/show_bug.cgi?id=1359215

I could reproduced the bug. Enabling debugging symbols affirms that it's actually the cited problem. 

After applying the proposed patch from the cited bug report the segfault was gone.

Alternatively, this can be fixed by using -fno-delete-null-pointer-checks in CXXFLAGS.

The proposed fix has been incorporated by upstream for 2.19.46 (https://github.com/lilypond/lilypond/commit/b0dce76daf27721ba157cd2ac5d7662d4c8d75f8) and can be applied to 2.18.2, too. It's only a change in two lines of code.

Comment 1 Robert Spillner 2018-03-27 09:02:06 UTC

Since lilypond-2.19.80 is stable now the bug (though unconfirmed) is fixed anyway, so this can be closed.