Aaron Hill <lilyp...@hillvisions.com> writes: > I think I have narrowed down the source of the problem. > > From stem-tremolo.cc:175-177: > >> Interval ph = stem->pure_y_extent (stem, 0, INT_MAX); >> Stem_info si = Stem::get_stem_info (stem); >> ph[-dir] = si.shortest_y_; > > There is an implicit assumption that si.shortest_y_ will always be > within the interval ph. Otherwise, the final line will produce an > inverted interval. And later on in the function, the !is_empty > assertion will fail when ph.center() is called.
Good analysis. Tracker issue: 5501 (https://sourceforge.net/p/testlilyissues/issues/5501/) Rietveld issue: 572550043 (https://codereview.appspot.com/572550043) Issue description: Avoid failed assertion in stem tremolo code Example code triggering the problem: \relative { a32 8..:32 } > Of course, this is not to say that Stem::calc_stem_info is definitely > in the wrong, but its output is not always what > Stem_tremolo::pure_height would seem to expect. This avoids the interval shrinking to void empty by not shrinking the interval, ever. I am not sure this is the right fix. Is the interval intended to shrink? -- David Kastrup _______________________________________________ bug-lilypond mailing list bug-lilypond@gnu.org https://lists.gnu.org/mailman/listinfo/bug-lilypond
