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[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #4814 grob.cc


From: Auto mailings of changes to Lily Issues
Subject: [Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #4814 grob.cc segfaults on Fedora 24 with gcc6
Date: Sat, 23 Jul 2016 12:28:46 +0000

I applied both patches provided by Guido in comment https://sourceforge.net/p/testlilyissues/issues/4814/#94d9 (above) and I was able to make, make test-baseline (I cannot do a make check because I cannot compile at all without the patch while using gcc (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3) which is what current Fedora uses).

It seems that the issue above (David K's comment) includes the fixes to 'grob.cc', but not the other parts of the patches provided by Guido.


[issues:#4814] grob.cc segfaults on Fedora 24 with gcc6

Status: Started
Created: Sat Mar 26, 2016 09:51 PM UTC by Valentin Villenave
Last Updated: Sat Jul 23, 2016 11:50 AM UTC
Owner: nobody

Greetings,
I’m trying to run LilyPond on Fedora 24 (with GCC 6.0); I’m able to compile it (with and without guile2 enabled) but when trying to use it, many LilyPond files trigger a segfault:

Parsing...
Interpreting music...
Preprocessing graphical objects...
Program received signal SIGSEGV, Segmentation fault.
0x0000000000496c2f in Grob::get_offset (address@hidden,
address@hidden) at grob.cc:400
400       if (dim_cache_[a].offset_)

Here are the regtests that reproduce the bug (the others compile just fine):

beam-cross-staff-slope.ly
dynamics-alignment-breaker-linebreak.ly
dynamics-alignment-breaker.ly
dynamics-alignment-breaker-order.ly
dynamics-alignment-breaker-subsequent-spanner.ly
dynamics-alignment-no-line-linebreak.ly
dynamics-alignment-no-line.ly
dynamics-context-textspan.ly
dynamics-unbound-hairpin.ly
event-listener-output.ly
fermata-rest-position.ly
font-name.ly
full-measure-rest-fermata.ly
line-arrows.ly
line-style-zigzag-spacing.ly
make-relative.ly
markup-line-thickness.ly
markup-note-grob-style.ly
metronome-mark-broken-bound.ly
minimum-length-after-break.ly
mm-rests2.ly
morgenlied.ly
mozart-hrn-3.ly
multi-measure-rest-center.ly
multi-measure-rest.ly
multi-measure-rest-spacing.ly
multi-measure-rest-text.ly
music-function-end-spanners.ly
offsets.ly
page-turn-page-breaking-repeats.ly
part-combine-a2.ly
part-combine-mmrest-apart.ly
part-combine-mmrest-shared.ly
part-combine-silence-mixed.ly
property-nested-override.ly
quote-cue-during.ly
quote-cue-event-types.ly
repeat-percent-count.ly
repeat-percent-count-visibility.ly
repeat-percent.ly
rest-positioning.ly
scheme-text-spanner.ly
skiptypesetting-multimeasurerest.ly
slur-broken-trend.ly
slur-scoring.ly
slur-tie-control-points.ly
slur-vertical-skylines.ly
spanner-after-line-breaking.ly
staff-mixed-size.ly
stem-direction.ly
stencil-scale.ly
tablature-full-notation.ly
tablature-harmonic-functions.ly
tablature-tie-spanner.ly
text-spanner-attachment-alignment.ly
text-spanner-full-rest.ly
text-spanner-override-order.ly
tie-direction-manual.ly
tie-pitched-trill.ly
trill-spanner-auto-stop.ly
trill-spanner-broken.ly
trill-spanner-chained.ly
trill-spanner-grace.ly
trill-spanner.ly
trill-spanner-pitched-consecutive.ly
trill-spanner-pitched-forced.ly
trill-spanner-pitched.ly
trill-spanner-scaled.ly

What makes is weird is that the bug happens both with my LilyPond
build (latest master branch) and with my distribution’s package
(Fedora repos generally have the latest development release: as of now
it’s 2.19.38 but this also happened with .37 and .36); however, GUB
packages of the exact same development release, don’t reproduce the
segfault.

Could it be because Fedora 24 is using GCC6? I’ve tried bisecting but I’m unable to compile any version older than a couple of weeks, prior to David’s more rigorous smob types:
http://git.savannah.gnu.org/cgit/lilypond.git/commit/?id=c6758d6d12e33779fc81218693d5650682d8a1ca

Let me know if I can provide any other information (and feel free to close this issue if it turns out to be caused by something in my environment).


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