Ok, I've got some valgrind output: Program terminated with signal SIGABRT, Aborted. #0 __restore_sigs (set=set@entry=0x1ffeffe910) at ./arch/x86_64/syscall_arch.h:40 40 return ret; (gdb) backtrace #0 __restore_sigs (set=set@entry=0x1ffeffe910) at ./arch/x86_64/syscall_arch.h:40 #1 0x00000000004cf1c4 in raise (sig=sig@entry=6) at src/signal/raise.c:11 #2 0x00000000004c96ea in abort () at src/exit/abort.c:11 #3 0x0000000000452f16 in catchsig (sig=) at main.c:1231 #4 catchsig (sig=) at main.c:1217 #5 #6 get_meta (p=p@entry=0x4a5af50 "\260\232\243\001") at src/malloc/mallocng/meta.h:141 #7 0x00000000004ca62c in __libc_free (p=0x4a5af50) at src/malloc/mallocng/free.c:105 #8 0x0000000000459d57 in r_unref (tmp=tmp@entry=0x48728c8) at node.c:492 #9 0x00000000004456e5 in unref (r=0x48728c8) at awk.h:1898 #10 purge_record () at field.c:360 #11 0x0000000000445f36 in set_record ( buf=0x549bdae "SIZE\t1KB\t192758\t112698119\nSIZE\t4KB\t462090\t1122421206\nSIZE\t16KB\t355596\t3138948391\nSIZE\t64KB\t413028\t13558910172\nSIZE\t256KB\t1014012\t165385758947\nSIZE\t1MB\t2546508\t1346405498466\nSIZE\t10MB\t480844\t1602796961"..., cnt=25, fw=0x0) at field.c:269 #12 0x000000000044e765 in inrec (iop=, errcode=errcode@entry=0x1ffefffa50) at io.c:608 #13 0x00000000004414f8 in h_interpret (code=) at interpret.h:1289 #14 0x0000000000402631 in main (argc=, argv=) at main.c:516 (gdb) frame 8 #8 0x0000000000459d57 in r_unref (tmp=tmp@entry=0x48728c8) at node.c:492 492 mpfr_unset(tmp); (gdb) print tmp $1 = (NODE *) 0x48728c8 (gdb) print *tmp $2 = {sub = {nodep = {l = {lptr = 0x100000002, li = 0x100000002, ll = 4294967298, lp = 0x100000002}, r = {rptr = 0x4a5af50, preg = {0x4a5af50, 0x0}, av = 0x4a5af50, bv = 0x4a5af50, uptr = 0x4a5af50, iptr = 0x4a5af50}, x = {extra = 0x0, aptr = 0x0, xl = 0}, name = 0x4e , reserved = 75884000, rn = 0x8, cnt = 0, reflags = 4294967295}, val = {nm = {fltnum = 2.1219957919534036e-314, mpnum = {{_mpfr_prec = 4294967298, _mpfr_sign = 77967184, _mpfr_exp = 0, _mpfr_d = 0x0}}, mpi = {{ _mp_alloc = 2, _mp_size = 1, _mp_d = 0x4a5af50}}}, rndmode = 78, sp = 0x485e5e0 "27499184", slen = 8, sref = 0, idx = -1, wsp = 0x0, wslen = 0, typre = 0x0}}, type = Node_val, flags = 2108} ==43165== Conditional jump or move depends on uninitialised value(s) ==43165== at 0x4CA82E: enframe (meta.h:204) ==43165== by 0x462EAB: xrealloc (xalloc.h:173) ==43165== by 0x462EAB: xpalloc (dfa.c:850) ==43165== by 0x462F52: copy.isra.10 (dfa.c:2043) ==43165== by 0x464BC1: dfaanalyze (dfa.c:2490) ==43165== by 0x4679F2: dfacomp (dfa.c:3527) ==43165== by 0x45F596: make_regexp (re.c:230) ==43165== by 0x413740: make_regnode (awkgram.y:5026) ==43165== by 0x416C08: yyparse (awkgram.y:505) ==43165== by 0x41B443: parse_program (awkgram.y:2587) ==43165== by 0x4025AB: main (main.c:469) ==43165== Uninitialised value was created by a stack allocation ==43165== at 0x4760E3: re_compile_internal (regcomp.c:755) ==43165== ==43165== Conditional jump or move depends on uninitialised value(s) ==43165== at 0x4CA82E: enframe (meta.h:204) ==43165== by 0x4D837D: __libc_realloc (realloc.c:46) ==43165== by 0x46B977: test_realloc (regex_internal.h:476) ==43165== by 0x46B977: re_dfa_add_node (regex_internal.c:1438) ==43165== by 0x46BA7A: duplicate_node (regcomp.c:1643) ==43165== by 0x46BC59: duplicate_node_closure (regcomp.c:1566) ==43165== by 0x46E3CF: calc_eclosure_iter.isra.30 (regcomp.c:1745) ==43165== by 0x47660C: calc_eclosure (regcomp.c:1708) ==43165== by 0x47660C: analyze (regcomp.c:1235) ==43165== by 0x47660C: re_compile_internal (regcomp.c:821) ==43165== by 0x476EB9: re_compile_pattern (regcomp.c:256) ==43165== by 0x45F0FA: make_regexp (re.c:215) ==43165== by 0x413765: make_regnode (awkgram.y:5031) ==43165== by 0x416C08: yyparse (awkgram.y:505) ==43165== by 0x41B443: parse_program (awkgram.y:2587) ==43165== Uninitialised value was created by a stack allocation ==43165== at 0x4760E3: re_compile_internal (regcomp.c:755) ==43165== ==43165== Conditional jump or move depends on uninitialised value(s) ==43165== at 0x4CA82E: enframe (meta.h:204) ==43165== by 0x462D44: xmalloc (xalloc.h:147) ==43165== by 0x46770C: xnmalloc (xalloc.h:134) ==43165== by 0x46770C: dfassbuild (dfa.c:3455) ==43165== by 0x46770C: dfacomp (dfa.c:3522) ==43165== by 0x45F596: make_regexp (re.c:230) ==43165== by 0x413765: make_regnode (awkgram.y:5031) ==43165== by 0x416C08: yyparse (awkgram.y:505) ==43165== by 0x41B443: parse_program (awkgram.y:2587) ==43165== by 0x4025AB: main (main.c:469) ==43165== Uninitialised value was created by a stack allocation ==43165== at 0x4760E3: re_compile_internal (regcomp.c:755) ==43165== Since it looks like a gawk bug, not directly anything to do with musl, I'll see if I can submit a bug report with the gawk maintainers. Ivo Palli ________________________________ From: Ivo Palli Sent: Friday, September 24, 2021 16:38 To: musl@lists.openwall.com ; Rich Felker Subject: Re: [musl] Musl compiled gawk coredumps. How to find out where? >Do you think you can share your script and input? That would help anyone >trying to reproduce the bug if they can't find the issue in the code via >inspection. I'm afraid not. But I will put some effort into helping to find the bug.