On Thursday 11 September 2008 07:17:56 Carl Mäsak wrote:
> Jonathan (>), Carl (>>):
> >> This also works, but segfaults:
> >>
> >> $ ./perl6 -e 'class A {}; sub c { say A.new.b() }; c'
> >> Method 'b' not found for invocant of class 'A'
> >> current instr.: 'c' pc 99 (EVAL_13:42)
> >> called from Sub '_block11' pc 17 (EVAL_13:11)
> >> called from Sub 'parrot;PCT::HLLCompiler;eval' pc 806
> >> (src/PCT/HLLCompiler.pir:481)
> >> called from Sub 'parrot;PCT::HLLCompiler;command_line' pc 1305
> >> (src/PCT/HLLCompiler.pir:708)
> >> called from Sub 'parrot;Perl6::Compiler;main' pc 14567 (perl6.pir:172)
> >> perl6(27149) malloc: *** error for object 0xcc2e40: double free
> >> *** set a breakpoint in malloc_error_break to debug
> >> Segmentation fault
> >
> > Is this still an issue - I think I saw something to the effect taht the
> > double free had been resolved recently-ish?
>
> Aye, this one still persists.
This backtrace pattern bothers me a lot; I wish I could figure it out:
Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb7b4f8d0 (LWP 29711)]
0xb7f17410 in __kernel_vsyscall ()
(gdb) bt
#0 0xb7f17410 in __kernel_vsyscall ()
#1 0x4810b085 in raise () from /lib/tls/i686/cmov/libc.so.6
#2 0x4810ca01 in abort () from /lib/tls/i686/cmov/libc.so.6
#3 0x4814e835 in free_check () from /lib/tls/i686/cmov/libc.so.6
#4 0x4814f495 in free () from /lib/tls/i686/cmov/libc.so.6
#5 0xb7cae3c1 in mem_sys_free (from=0x0) at src/gc/memory.c:304
#6 0xb7caeafa in destroy_context (interp=0x81e4008) at src/gc/register.c:163
#7 0xb7cb555b in Parrot_really_destroy (interp=0x81e4008, exit_code_unused=1,
arg_unused=0x0) at src/inter_create.c:441
#8 0xb7ca8459 in Parrot_exit (interp=0x81e4008, status=1) at src/exit.c:89
#9 0xb7ca7e26 in find_exception_handler (interp=0x81e4008,
exception=0x4822b864) at src/exceptions.c:149
#10 0xb7ca8095 in Parrot_ex_throw_from_op (interp=0x81e4008,
exception=0xb772ee3c, dest=0x0) at src/exceptions.c:193
#11 0xb7ca8209 in Parrot_ex_rethrow_from_op (interp=0x81e4008,
exception=0xb772ee3c) at src/exceptions.c:363
#12 0xb7c7af1f in Parrot_rethrow_p (cur_opcode=0x828d6f4, interp=0x81e4008)
at src/ops/core.ops:832
#13 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0x828d6f4)
at src/runops_cores.c:222
#14 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=164)
at src/interpreter.c:937
#15 0xb7cb754d in runops (interp=0x81e4008, offs=164) at src/inter_run.c:101
---Type <return> to continue, or q <return> to quit---
#16 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb772ef1c,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb38f5c "<��x�212�<��x�212�-") at src/inter_run.c:236
#17 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb772ef1c,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
#18 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb772ee3c) at src/exceptions.c:292
#19 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008,
ret_addr=0x828d65c, exitcode=45,
format=0xb7e76018 "Method '%Ss' not found for invocant of class '%Ss'")
at src/exceptions.c:339
#20 0xb7c63a6c in Parrot_callmethodcc_p_sc (cur_opcode=0x828d650,
interp=0x81e4008) at src/ops/object.ops:71
#21 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0x828d650)
at src/runops_cores.c:222
#22 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#23 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#24 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73c65e0,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb3916c "�<��X��<��X�\024") at src/inter_run.c:236
#25 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73c65e0,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
---Type <return> to continue, or q <return> to quit---
#26 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73c58c0) at src/exceptions.c:292
#27 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#28 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73c620c)
at src/oo.c:624
#29 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73c6084,
info=0xb73c594c) at ./src/pmc/class.pmc:222
#30 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73c620c) at src/pmc.c:368
#31 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#32 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#33 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#34 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#35 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73b40dc,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb3942c "t>;��X�t>;��X�\024") at src/inter_run.c:236
#36 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73b40dc,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
#37 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73b3e74) at src/exceptions.c:292
#38 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#39 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73b4050)
at src/oo.c:624
#40 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73b3ffc,
info=0xb73b3eac) at ./src/pmc/class.pmc:222
#41 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73b4050) at src/pmc.c:368
#42 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#43 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#44 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#45 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#46 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73b67b0,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb396ec "�e;�l\002Y��e;�l\002Y�\024") at src/inter_run.c:236
#47 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73b67b0,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
---Type <return> to continue, or q <return> to quit---
#48 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73b65b8) at src/exceptions.c:292
#49 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#50 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73b6724)
at src/oo.c:624
#51 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73b66b4,
info=0xb73b65d4) at ./src/pmc/class.pmc:222
#52 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73b6724) at src/pmc.c:368
#53 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#54 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#55 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#56 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#57 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73b98e8,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb399ac "�226;�`VY��226;�`VY�\024") at src/inter_run.c:236
#58 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73b98e8,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
#59 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73b96f0) at src/exceptions.c:292
#60 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#61 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73b9840)
at src/oo.c:624
#62 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73b97ec,
info=0xb73b970c) at ./src/pmc/class.pmc:222
#63 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73b9840) at src/pmc.c:368
#64 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#65 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#66 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#67 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#68 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73bb30c,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb39c6c "0�;��W�0�;��W�\024") at src/inter_run.c:236
#69 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73bb30c,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
---Type <return> to continue, or q <return> to quit---
#70 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73bb130) at src/exceptions.c:292
#71 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#72 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73bb280)
at src/oo.c:624
#73 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73bb22c,
info=0xb73bb14c) at ./src/pmc/class.pmc:222
#74 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73bb280) at src/pmc.c:368
#75 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#76 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#77 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#78 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#79 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73bcef0,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb39f2c "\024��8\214W�\024��8\214W�\024") at src/inter_run.c:236
#80 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73bcef0,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
#81 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73bcd14) at src/exceptions.c:292
#82 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#83 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73bce64)
at src/oo.c:624
#84 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73bce10,
info=0xb73bcd30) at ./src/pmc/class.pmc:222
#85 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73bce64) at src/pmc.c:368
#86 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#87 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#88 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#89 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#90 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73bef34,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb3a1ec "\004���DY�\004���DY�\024") at src/inter_run.c:236
#91 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73bef34,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
---Type <return> to continue, or q <return> to quit---
#92 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73bed04) at src/exceptions.c:292
#93 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008, ret_addr=0x0,
exitcode=20, format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#94 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73bee8c)
at src/oo.c:624
#95 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73bee38,
info=0xb73bed58) at ./src/pmc/class.pmc:222
#96 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73bee8c) at src/pmc.c:368
#97 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008)
at src/ops/object.ops:249
#98 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#99 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=3289)
at src/interpreter.c:937
#100 0xb7cb754d in runops (interp=0x81e4008, offs=3289) at src/inter_run.c:101
#101 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0xb73c2b24,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e80886 "vPS",
ap=0xbfb3a4ac "H)<�8\215Y�H)<�8\215Y�\024") at src/inter_run.c:236
#102 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0xb73c2b24,
sig=0xb7e80886 "vPS") at src/inter_run.c:300
#103 0xb7ca7fcc in Parrot_ex_throw_from_c (interp=0x81e4008,
exception=0xb73c2948) at src/exceptions.c:292
#104 0xb7ca8361 in Parrot_ex_throw_from_c_args (interp=0x81e4008,
ret_addr=0x0, exitcode=20,
format=0xb7e82edc "Class %Ss already registered!\n")
at src/exceptions.c:339
#105 0xb7cdec19 in Parrot_oo_register_type (interp=0x81e4008, name=0xb73c2a98)
at src/oo.c:624
#106 0xb7e02296 in init_class_from_hash (interp=0x81e4008, self=0xb73c2a44,
info=0xb73c2964) at ./src/pmc/class.pmc:222
#107 0xb7ce620f in pmc_new_init (interp=0x81e4008, base_type=49,
init=0xb73c2a98) at src/pmc.c:368
#108 0xb7c70607 in Parrot_newclass_p_p (cur_opcode=0xb7b67b24,
interp=0x81e4008) at src/ops/object.ops:249
#109 0xb7ce6bd0 in runops_slow_core (interp=0x81e4008, pc=0xb7b67b24)
at src/runops_cores.c:222
#110 0xb7cb6a7f in runops_int (interp=0x81e4008, offset=15907)
at src/interpreter.c:937
#111 0xb7cb754d in runops (interp=0x81e4008, offs=15907) at
src/inter_run.c:101
#112 0xb7cb7753 in runops_args (interp=0x81e4008, sub=0x84d409c,
obj=0x823cf28, meth_unused=0x0, sig=0xb7e75473 "vP", ap=0xbfb3a76c " &s�")
at src/inter_run.c:236
#113 0xb7cb7d77 in Parrot_runops_fromc_args (interp=0x81e4008, sub=0x84d409c,
sig=0xb7e75473 "vP") at src/inter_run.c:300
#114 0xb7ca54f8 in Parrot_runcode (interp=0x81e4008, argc=3, argv=0xbfb3a864)
at src/embed.c:951
#115 0x08048a40 in main (argc=3, argv=0xbfb3a864) at perl6.c:25927
-- c
