A probably GC related bug emerged with the new sprintf code.
Putting "sweepoff" in front of the PASM avoids the bug.
Running various tests with the -d flag SIGSEGVs at printing memory
statistics:
$ time parrot -d t/pmc/intlist_6.pbc
*** Parrot VM: Debugging enabled. ***
*** Parrot VM: Setting up ARGV array in P0. Current argc: 1 ***
0: t/pmc/intlist_6.pbc
ok 1
ok 2
Segmentation fault (core dumped)
(gdb) bac
#0 0x400da023 in memcpy () at ../sysdeps/generic/memcpy.c:64
#1 0x8078496 in string_append (interpreter=0x8126640, a=0x813c4d0,
b=0x813c4f4, Uflags=0) at string.c:146
#2 0x80be1a0 in Parrot_sprintf_format (interpreter=0x8126640,
pat=0x813c4f4,
obj=0xbffff45c) at spf_render.c:631
#3 0x80bcc12 in Parrot_vsprintf_s (interpreter=0x8126640, pat=0x813c4f4,
args=0xbffff504) at misc.c:40
#4 0x80bcc7a in Parrot_vsprintf_c (interpreter=0x8126640,
pat=0x80e5780 "*** Parrot VM: Dumping GC info ***\n\tTotal memory
allocated: %p\n\tTotal DOD runs: %p\n\tTotal collector runs:
%p\n\tActive PMCs:", ' ' <repeats 12 times>, "%p\n\tActive buffers:
%p\n\tTotal PMCs:", ' ' <repeats 13 times>..., args=0xbffff4ec) at
misc.c:50
#5 0x80bf9d7 in PIO_eprintf (interpreter=0x8126640,
s=0x80e5780 "*** Parrot VM: Dumping GC info ***\n\tTotal memory
allocated: %p\n\tTotal DOD runs: %p\n\tTotal collector runs:
%p\n\tActive PMCs:", ' ' <repeats 12 times>, "%p\n\tActive buffers:
%p\n\tTotal PMCs:", ' ' <repeats 13 times>...) at io/io.c:664
#6 0x808ed12 in Parrot_runcode (interpreter=0x8126640, argc=1,
argv=0xbffff5ec) at embed.c:357
#7 0x80d5f6b in main (argc=1, argv=0xbffff5ec) at test_main.c:50
I couldn't trace it down til now - but probably some string is moving
around, whille a pointer is kept into it.
leo
