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Re: Core dump for tremolo

From: Rutger Hofman
Subject: Re: Core dump for tremolo
Date: Sat, 16 Sep 2017 00:43:38 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1

On 09/15/2017 11:20 PM, David Kastrup wrote:
Knut Petersen <address@hidden> writes:

Am 23.10.2016 um 18:17 schrieb Thomas Morley:
2016-10-23 17:51 GMT+02:00 Rutger Hofman <address@hidden>:
Good evening bug list,

I get a core dump for version 2.19.39 (and also 2.19.48) but not for 2.18.2
for this program:

\version "2.19.39"

\relative c' {
      c8:32 c32 c c c

Preprocessing graphical objects...lilypond:
T Interval_t<T>::center() const [with T = double]: Assertion `!is_empty ()'
Aborted (core dumped)

Rutger Hofman

This is still an issue of current master ... has anybody investigated
the problem ?

I don't know whether we have an issue in the tracker for this, but it
will always be an issue since there is no valid output for this input
(I don't think one can have both a flag and a stem tremolo).  Aborting
with a core dump (and a cryptic message not obviously related to the
input) is of course about the worst possible diagnostic, but we would
not be able to produce valid graphics either.

Alban Berg doesn't agree with you. This fragment is a (minimalized) paraphrase of Berg's Lulu Suite, mvt V, bar 85 [1275], second beat, of first (upper and lower) and second violins. See http://imslp.org/wiki/Lulu_Suite_(Berg%2C_Alban) in the score of the 5th movement at page 18 (133). Would it make a difference that there is a beam i.s.o. a flag? I will check 'Behind Bars' anyway.


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