abcm2ps crash in set_stems at music.:4400 ... with example input file. Running git clone/pull from today.

[marshallmidden]

sigh Provided: macos lldb output of interest. The arguments of abcm2ps. The input file. And how I changed things to fix/get around it. (And something else, which I have forgotten ...)

• frame #0: 0x00000001004a6148 abcm2ps`output_music [inlined] set_stems at music.c:4400:13 [opt]
• (SYMBOL *) s2 = NULL

PROGRAM='/Users/m4/Desktop/saved-m4-stuff/src/abcm2ps/abcm2ps'
PROGRAM_ARGS="-M -b 1 ${INPUT} -i -N 2 -j 1"

Input:
%abc
X:1
%%staves [ (1 2) ]
%%combinevoices 1
L:1/4
K:C
V:1
[L:1/4][M:2/4]G/4=e/4=e/4=e/4[L:1/16](4:4:4=e=e=e=e |]
V:2
[L:1/4][M:2/4]z/4B/4B/4B/4[L:1/16](4:4:4BBBB |]

git diff:

@@ -4396,6 +4397,7 @@ static void set_stems(void)
if (s->sflags & S_FEATHERED_BEAM)
nflags = ++s->nflags;
for (s2 = s->next; /s2/; s2 = s2->next) {

•                           if (s2 == NULL) break;
                            if (s2->abc_type == ABC_T_NOTE) {
                                    if (s->sflags & S_FEATHERED_BEAM)
                                            s2->nflags++;
  

@@ -4404,14 +4406,17 @@ static void set_stems(void)
}
}
/* if (s2) */

•                   if (s2)
                        if (s2->nflags > nflags)
                            nflags = s2->nflags;
            } else if ((s->sflags & (S_BEAM_ST | S_BEAM_END)) == S_BEAM_END) {
  

•                   for (s2 = s->prev; /*s2*/; s2 = s2->prev) {
  

+// for (s2 = s->prev; /s2/; s2 = s2->prev) {

•                   for (s2 = s->prev; s2; s2 = s2->prev) {
                            if (s2->sflags & S_BEAM_ST)
                                    break;
                    }
  

/* if (s2) */

•                   if (s2)
                        if (s2->nflags > nflags)
                            nflags = s2->nflags;
            }