Dear Maintainer, with the help of the core saved in the artifacts I found that the crash happens when fontforge tries to print some logging.
It just started to crash if I run the command with LANG=C. It seems to be caused by the call to function iconv returns with errno==EILSEQ (Illegal byte sequence). This could possibly be this "©" in the string to be processed. Kind regards, Bernhard $ LANG=C rr record fontforge -script /home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/debian/clear-fstype.pe /home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/femkeklaver.ttf $ rr replay -o-q ... Breakpoint 3, iconv (cd=cd@entry=0x55b4437f72d0, inbuf=inbuf@entry=0x7fff48abee88, inbytesleft=inbytesleft@entry=0x7fff48abee80, outbuf=outbuf@entry=0x7fff48abeea0, outbytesleft=outbytesleft@entry=0x7fff48abee98) at ./iconv/iconv.c:32 32 { (rr) finish Run till exit from #0 iconv (cd=cd@entry=0x55b4437f72d0, inbuf=inbuf@entry=0x7fff48abee88, inbytesleft=inbytesleft@entry=0x7fff48abee80, outbuf=outbuf@entry=0x7fff48abeea0, outbytesleft=outbytesleft@entry=0x7fff48abee98) at ./iconv/iconv.c:32 0x00007fd0fc8a0b69 in do_iconv (cd=0x55b4437f72d0, inbuf=<optimized out>, inbuf@entry=0x7fff48abeef0, incount=<optimized out>, inunitsize=inunitsize@entry=1, outunitsize=outunitsize@entry=1) at ./Unicode/ucharmap.c:101 101 if (iconv(cd, (iconv_arg2_t)&inbuf, &incount, &dst, &outremain) == (size_t)-1) { Value returned is $19 = 18446744073709551615 (rr) next 102 if (errno == E2BIG) { (rr) print errno $20 = 84 (rr) print inbuf $21 = <optimized out> (rr) up #1 0x00007fd0fc8a0fd5 in utf82def_copy (ufrom=ufrom@entry=0x7fff48abeef0 "Warning: Mac and Windows entries in the 'name' table differ for the\n Copyright string in the language English (US)\n Mac String: Typeface © (your company). 2008. All Rights Reserved\nWindows String: Typeface © (femkeklaver.nl). 2008. All Rights Reserved\n") at ./Unicode/ucharmap.c:159 159 return do_iconv(from_utf8, ufrom, strlen(ufrom), sizeof(ufrom[0]), sizeof(char)); (rr) print ufrom $22 = 0x7fff48abeef0 "Warning: Mac and Windows entries in the 'name' table differ for the\n Copyright string in the language English (US)\n Mac String: Typeface © (your company). 2008. All Rights Reserved\nWindows String: Typeface © (femkeklaver.nl). 2008. All Rights Reserved\n" (rr) bt #0 do_iconv (cd=0x55b4437f72d0, inbuf=<optimized out>, inbuf@entry=0x7fff48abeef0, incount=<optimized out>, inunitsize=inunitsize@entry=1, outunitsize=outunitsize@entry=1) at ./Unicode/ucharmap.c:102 #1 0x00007fd0fc8a0fd5 in utf82def_copy (ufrom=ufrom@entry=0x7fff48abeef0 "Warning: Mac and Windows entries in the 'name' table differ for the\n Copyright string in the language English (US)\n Mac String: Typeface © (your company). 2008. All Rights Reserved\nWindows String: Typeface © (femkeklaver.nl). 2008. All Rights Reserved\n") at ./Unicode/ucharmap.c:159 #2 0x00007fd0fc958a84 in NOUI__LogError (format=<optimized out>, ap=ap@entry=0x7fff48abf0b0) at ./fontforge/nouiutil.c:55 #3 0x00007fd0fc958c49 in NOUI_LogError (format=<optimized out>) at ./fontforge/nouiutil.c:66 #4 0x00007fd0fc98555a in TTFAddLangStr (language=<optimized out>, spec=<optimized out>, plat=<optimized out>, stroff=<optimized out>, strlength=<optimized out>, id=0, info=0x7fff48abf220, ttf=0x55b4437ff990) at ./fontforge/parsettf.c:1609 #5 readttfcopyrights (info=0x7fff48abf220, ttf=0x55b4437ff990) at ./fontforge/parsettf.c:1748 #6 readttfpreglyph (info=0x7fff48abf220, ttf=0x55b4437ff990) at ./fontforge/parsettf.c:1814 #7 readttf (filename=0x55b4437ff930 "/home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/femkeklaver.ttf", info=0x7fff48abf220, ttf=0x55b4437ff990) at ./fontforge/parsettf.c:5554 #8 _SFReadTTF (ttf=ttf@entry=0x55b4437ff990, flags=flags@entry=0, openflags=openflags@entry=0, filename=filename@entry=0x55b4437ff930 "/home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/femkeklaver.ttf", chosenname=chosenname@entry=0x0, fd=fd@entry=0x0) at ./fontforge/parsettf.c:6342 #9 0x00007fd0fca66a7a in _ReadSplineFont (file=<optimized out>, file@entry=0x0, filename=filename@entry=0x55b4437ff870 "/home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/femkeklaver.ttf", openflags=openflags@entry=0) at ./fontforge/splinefont.c:1130 #10 0x00007fd0fca6794c in ReadSplineFont (filename=filename@entry=0x55b4437ff870 "/home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/femkeklaver.ttf", openflags=openflags@entry=0) at ./fontforge/splinefont.c:1310 #11 0x00007fd0fca67a51 in LoadSplineFont (filename=filename@entry=0x55b4437ff810 "/home/benutzer/source/fonts-femkeklaver/git/fonts-femkeklaver/femkeklaver.ttf", openflags=openflags@entry=0) at ./fontforge/splinefont.c:1361 #12 0x00007fd0fca0701e in bOpen (c=0x7fff48abfc10) at ./fontforge/scripting.c:1802 #13 0x00007fd0fca0a273 in docall (c=c@entry=0x7fff48ac03e0, name=name@entry=0x7fff48abfe60 "Open", val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9241 #14 0x00007fd0fca0a6ee in handlename (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9354 #15 0x00007fd0fca0ba77 in term (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9592 #16 0x00007fd0fca0be23 in mul (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9737 #17 0x00007fd0fca0c0e5 in add (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9783 #18 0x00007fd0fca0c4be in comp (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9858 #19 0x00007fd0fca0c7ad in _and (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9899 #20 0x00007fd0fca0c96e in _or (val=0x7fff48ac0280, c=0x7fff48ac03e0) at ./fontforge/scripting.c:9931 #21 assign (c=c@entry=0x7fff48ac03e0, val=val@entry=0x7fff48ac0280) at ./fontforge/scripting.c:9967 #22 0x00007fd0fca09534 in expr (val=0x7fff48ac0280, c=0x7fff48ac03e0) at ./fontforge/scripting.c:10045 #23 ff_statement (c=c@entry=0x7fff48ac03e0) at ./fontforge/scripting.c:10258 #24 0x00007fd0fca0d6d1 in ProcessNativeScript (argc=argc@entry=4, argv=argv@entry=0x7fff48ac0848, script=script@entry=0x0) at ./fontforge/scripting.c:10405 #25 0x00007fd0fca0dd9d in _CheckIsScript (argv=0x7fff48ac0848, argc=1) at ./fontforge/scripting.c:10505 #26 CheckIsScript (argc=argc@entry=4, argv=argv@entry=0x7fff48ac0848) at ./fontforge/scripting.c:10546 #27 0x000055b44351f4aa in fontforge_main (argc=4, argv=0x7fff48ac0848) at ./fontforgeexe/startnoui.c:134 #28 0x00007fd0fc64618a in __libc_start_call_main (main=main@entry=0x55b44351f160 <main>, argc=argc@entry=4, argv=argv@entry=0x7fff48ac0848) at ../sysdeps/nptl/libc_start_call_main.h:58 #29 0x00007fd0fc646245 in __libc_start_main_impl (main=0x55b44351f160 <main>, argc=4, argv=0x7fff48ac0848, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff48ac0838) at ../csu/libc-start.c:381 #30 0x000055b44351f191 in _start () (rr) finish Run till exit from #1 0x00007fd0fc8a0fd5 in utf82def_copy (ufrom=ufrom@entry=0x7fff48abeef0 "Warning: Mac and Windows entries in the 'name' table differ for the\n Copyright string in the language English (US)\n Mac String: Typeface © (your company). 2008. All Rights Reserved\nWindows String: Typeface © (femkeklaver.nl). 2008. All Rights Reserved\n") at ./Unicode/ucharmap.c:159 0x00007fd0fc958a84 in NOUI__LogError (format=<optimized out>, ap=ap@entry=0x7fff48abf0b0) at ./fontforge/nouiutil.c:56 56 fprintf(stderr,"%s",str); Value returned is $23 = 0x0 (rr) print str $24 = <optimized out> (rr) next Program received signal SIGSEGV, Segmentation fault. __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:76 76 VPCMPEQ (%rdi), %ymm0, %ymm1 (rr) bt 5 #0 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:76 #1 0x00007fd0fc695425 in __GI__IO_fputs (str=str@entry=0x0, fp=0x7fd0fc7f2680 <_IO_2_1_stderr_>) at ./libio/iofputs.c:33 #2 0x00007fd0fc958a9a in fprintf (__fmt=<synthetic pointer>, __stream=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/stdio2.h:79 #3 NOUI__LogError (format=<optimized out>, ap=ap@entry=0x7fff48abf0b0) at ./fontforge/nouiutil.c:56 #4 0x00007fd0fc958c49 in NOUI_LogError (format=<optimized out>) at ./fontforge/nouiutil.c:66 (More stack frames follow...) (rr) up #1 0x00007fd0fc695425 in __GI__IO_fputs (str=str@entry=0x0, fp=0x7fd0fc7f2680 <_IO_2_1_stderr_>) at ./libio/iofputs.c:33 33 size_t len = strlen (str); (rr) print str $25 = 0x0 (rr) /usr/include/asm-generic/errno.h:67:#define EILSEQ 84 /* Illegal byte sequence */