[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5383 Crash wi

[issues:#5383] Crash with simultaneous-duplicating music function and \once \offset

Status: New
Created: Mon Jul 16, 2018 05:45 AM UTC by pkx166h
Last Updated: Mon Jul 16, 2018 05:45 AM UTC
Owner: nobody

On 2018-07-15 18:21, Simon Albrecht wrote:

Hello everybody,

this combination of a custom music function that combines the music

simultaneously with itself and a \once\offset command causes LilyPond

to crash (exit with return code 11):

%%%%%%%%%%%%

\version "2.19.82"

test =

#(define-music-function (parser location mus) (ly:music?)

  #{ << $mus $mus >> #})

\test { \once\offset length 1 Stem 4 }

%%%%%%%%%%%%

On Sun, 15 Jul 2018 20:09:52 -0700, Aaron Hill wrote:

Seems the custom music function is not needed to reproduce a crash.

%%%%
\version "2.19.82"
music = { \once \offset length 5 Stem 4 4 }
<< \music \music >>
%%%%

This also results in:

GNU LilyPond 2.19.82

Processing `crash.ly'

Parsing...

Interpreting music...

Preprocessing graphical objects...

fish: “lilypond crash.ly” terminated by signal SIGSEGV (Address

boundary error)

Omitting the \once lets the example compile. And use of \undo works in
lieu of \once:

%%%%
\version "2.19.82"
longStem = \offset length 5 Stem
music = { \longStem 4 \undo \longStem 4 }
<< \music \music >>
%%%%

However, attempting to test the "tweak" variant of \offset...

%%%%
\version "2.19.82"
music = { \offset Stem.length 5 4 4 }
<< \music \music >>
%%%%

...produced a different error:

GNU LilyPond 2.19.82

Processing `crash.ly'

Parsing...

Interpreting music...lilypond:

/home/gub/NewGub/gub/target/linux-64/src/lilypond-git.sv.gnu.org--lilypond.git-stable-2.20/lily/context-def.cc:232:

std::vector<Context_def*>

Context_def::internal_path_to_acceptable_context(SCM, Output_def*, SCM,

std::set<const Context_def*>*) const: Assertion `(!(6 & ((scm_t_bits)

(0? (*(SCM*)0=(type_sym)): type_sym))) && ((0x7f & ((((scm_t_bits) (0?

(*(SCM*)0=((((SCM *)((scm_t_cell *) (((scm_t_bits) (0?

(*(SCM*)0=((((type_sym))))): (((type_sym)))))))) [((0))]))): (((SCM

*)((scm_t_cell *) (((scm_t_bits) (0? (*(SCM*)0=((((type_sym))))):

(((type_sym)))))))) [((0))])))))) == 5))' failed.

fish: “lilypond crash.ly” terminated by signal SIGABRT (Abort)

Figuring that perhaps the parser is confused by the naked duration, I
tried this:

%%%%
\version "2.19.82"
music = { \offset Stem.length 5 c'4 4 }
<< \music \music >>
%%%%

It compiles, but produces two staves as output rather than combining the
notes on one staff. I am almost certainly overlooking an important
detail in parsing which would explain this difference, but it is still
confusing to say the least.

-- Aaron Hill

Sent from sourceforge.net because address@hidden is subscribed to https://sourceforge.net/p/testlilyissues/issues/

To unsubscribe from further messages, a project admin can change settings at https://sourceforge.net/p/testlilyissues/admin/issues/options. Or, if this is a mailing list, you can unsubscribe from the mailing list.

From:	Auto mailings of changes to Lily Issues via Testlilyissues-auto
Subject:	[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5383 Crash with simultaneous-duplicating music function and \once \offset
Date:	Mon, 16 Jul 2018 05:45:25 -0000