On Sun, Jan 2, 2011 at 2:14 AM, Matthias Kilian
<address@hidden> wrote:
On Sat, Jan 01, 2011 at 02:10:04PM +0100, Matthias Kilian wrote:
> I don't know why gdb doesn't find paper-column.hh, but anyaway...
> it looks like Item::get_column() returns NULL, because its parent's
> get_column() returns NULL (I checked that the parent on the X_AXIS
> itself is not NULL).
Bisected to this one (cc'd Neil):
commit 6d28aebbaaab1be9961a00bf15a1ef93acb91e30
Author: Neil Puttock <address@hidden>
Date: Mon Sep 6 22:49:28 2010 +0100
Fix metronome alignment.
Don't align on KeySignature unless explicitly requested via
'break-align-symbols and make order of 'break-align-symbols
significant.
* remove `key-signature' from 'break-align-symbols
* acknowledge break_alignment, and set this as X-parent
instead of break_aligned, but only if found break_aligned
is visible
* add regression test to test ordering
* tweak existing test to reflect change in default for
'break-align-symbols
[...]
I tried the diff below, which `fixed' the segfault, but it may be
completely wrong (I'm currently not familiar with the LilyPond code
at all). Unfortunately, I don't have a new enough ImageMagick on my
system, so I can't run the regression tests.
diff --git a/lily/metronome-engraver.cc b/lily/metronome-engraver.cc
index 0a41fc9..e34c0ad 100644
--- a/lily/metronome-engraver.cc
+++ b/lily/metronome-engraver.cc
@@ -95,7 +95,10 @@ Metronome_mark_engraver::acknowledge_break_aligned (Grob_info info)
&& safe_is_member (g->get_property ("break-align-symbol"),
text_->get_property ("break-align-symbols"))
&& Item::break_visible (g))
- support_ = g;
+ {
+ support_ = g;
+ text_->set_parent (g, X_AXIS);
+ }
}
In your original backtrace, is the X_AXIS parent of the Item in frame #2 0x0? If so, I'm fine with the patch.
Cheers,
Joe