asan.log

=================================================================
==18832==ERROR: AddressSanitizer: heap-use-after-free on address 0x603000445120 at pc 0x7f5a9e81d94a bp 0x7ffd4ed70590 sp 0x7ffd4ed70580
READ of size 8 at 0x603000445120 thread T0
    #0 0x7f5a9e81d949 in gc_mark src/6model/reprs/MVMCallCapture.c:50
    #1 0x7f5a9e7a00ce in process_worklist src/gc/collect.c:313
    #2 0x7f5a9e7a1520 in MVM_gc_collect src/gc/collect.c:129
    #3 0x7f5a9e792d62 in run_gc src/gc/orchestrate.c:357
    #4 0x7f5a9e794afd in MVM_gc_enter_from_allocator src/gc/orchestrate.c:470
    #5 0x7f5a9e6fdc35 in MVM_interp_run src/core/interp.c:4354
    #6 0x7f5a9e977aaf in MVM_vm_run_file src/moar.c:318
    #7 0x55f83df341dd in main src/main.c:246
    #8 0x7f5a9de763f0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x203f0)
    #9 0x55f83df34339 in _start (/home/dan/Source/perl6/install/bin/moar+0x2339)

0x603000445120 is located 0 bytes inside of 32-byte region [0x603000445120,0x603000445140)
freed by thread T0 here:
    #0 0x7f5a9f4c9b60 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc6b60)
    #1 0x7f5a9e81d164 in MVM_free src/core/alloc.h:29
    #2 0x7f5a9e81d164 in gc_free src/6model/reprs/MVMCallCapture.c:77
    #3 0x7f5a9e7a1975 in MVM_gc_collect_free_nursery_uncopied src/gc/collect.c:580
    #4 0x7f5a9e7930b8 in finish_gc src/gc/orchestrate.c:233
    #5 0x7f5a9e7930b8 in run_gc src/gc/orchestrate.c:361
    #6 0x7f5a9e794afd in MVM_gc_enter_from_allocator src/gc/orchestrate.c:470
    #7 0x7f5a9e6fdc35 in MVM_interp_run src/core/interp.c:4354
    #8 0x7f5a9e977aaf in MVM_vm_run_file src/moar.c:318
    #9 0x55f83df341dd in main src/main.c:246
    #10 0x7f5a9de763f0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x203f0)

previously allocated by thread T0 here:
    #0 0x7f5a9f4ca080 in calloc (/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc7080)
    #1 0x7f5a9e6cb212 in MVM_calloc src/core/alloc.h:11
    #2 0x7f5a9e6cb212 in MVM_args_copy_callsite src/core/args.c:46
    #3 0x7f5a9e6cb5d5 in MVM_args_save_capture src/core/args.c:104
    #4 0x7f5a9e6e04f8 in MVM_interp_run src/core/interp.c:1261
    #5 0x7f5a9e977aaf in MVM_vm_run_file src/moar.c:318
    #6 0x55f83df341dd in main src/main.c:246
    #7 0x7f5a9de763f0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x203f0)

SUMMARY: AddressSanitizer: heap-use-after-free src/6model/reprs/MVMCallCapture.c:50 in gc_mark
Shadow bytes around the buggy address:
  0x0c06800809d0: 00 00 00 00 fa fa fd fd fd fd fa fa fd fd fd fd
  0x0c06800809e0: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
  0x0c06800809f0: fd fd fa fa fd fd fd fd fa fa fd fd fd fd fa fa
  0x0c0680080a00: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
  0x0c0680080a10: fa fa fd fd fd fd fa fa fd fd fd fa fa fa 00 00
=>0x0c0680080a20: 00 00 fa fa[fd]fd fd fd fa fa fd fd fd fd fa fa
  0x0c0680080a30: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
  0x0c0680080a40: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
  0x0c0680080a50: fd fa fa fa 00 00 00 00 fa fa fd fd fd fd fa fa
  0x0c0680080a60: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
  0x0c0680080a70: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==18832==ABORTING