I compiled Chrome on Linux with the following settings:

enable_nacl = false
symbol_level = 2
is_component_build = true
is_asan = true
is_debug = false
dcheck_always_on = true

When running unittests, I get the following ASan failure:

[ RUN      ] JSCallReducerTest.PromiseConstructorWithHook
=================================================================
==259720==ERROR: AddressSanitizer: heap-use-after-free on address 0x619000243340 at pc 0x7f04eaf8884f bp 0x7ffe48831450 sp 0x7ffe48831448
WRITE of size 1 at 0x619000243340 thread T0
    #0 0x7f04eaf8884e  (./src/out/Default/./libv8_for_testing.so+0x222a84e)
    #1 0x7f04eafad433  (./src/out/Default/./libv8_for_testing.so+0x224f433)
    #2 0x7f04eadb204d  (./src/out/Default/./libv8_for_testing.so+0x205404d)
    #3 0x559e22aa37d5  (./src/out/Default/unittests+0x118b7d5)
    #4 0x559e23a2e792  (./src/out/Default/unittests+0x2116792)
    #5 0x559e23a30764  (./src/out/Default/unittests+0x2118764)
    #6 0x559e23a31a56  (./src/out/Default/unittests+0x2119a56)
    #7 0x559e23a57636  (./src/out/Default/unittests+0x213f636)
    #8 0x559e23a56862  (./src/out/Default/unittests+0x213e862)
    #9 0x559e233a2f0d  (./src/out/Default/unittests+0x1a8af0d)
    #10 0x7f04e614a2b0  (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

0x619000243340 is located 448 bytes inside of 904-byte region [0x619000243180,0x619000243508)
freed by thread T0 here:
    #0 0x559e224e4ca2  (./src/out/Default/unittests+0xbccca2)
    #1 0x559e23a308c2  (./src/out/Default/unittests+0x21188c2)
    #2 0x559e23a31a56  (./src/out/Default/unittests+0x2119a56)
    #3 0x559e23a57636  (./src/out/Default/unittests+0x213f636)
    #4 0x559e23a56862  (./src/out/Default/unittests+0x213e862)
    #5 0x559e233a2f0d  (./src/out/Default/unittests+0x1a8af0d)
    #6 0x7f04e614a2b0  (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

previously allocated by thread T0 here:
    #0 0x559e224e4062  (./src/out/Default/unittests+0xbcc062)
    #1 0x559e22ac5e3f  (./src/out/Default/unittests+0x11ade3f)
    #2 0x559e23a30670  (./src/out/Default/unittests+0x2118670)
    #3 0x559e23a31a56  (./src/out/Default/unittests+0x2119a56)
    #4 0x559e23a57636  (./src/out/Default/unittests+0x213f636)
    #5 0x559e23a56862  (./src/out/Default/unittests+0x213e862)
    #6 0x559e233a2f0d  (./src/out/Default/unittests+0x1a8af0d)
    #7 0x7f04e614a2b0  (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

SUMMARY: AddressSanitizer: heap-use-after-free (./src/out/Default/./libv8_for_testing.so+0x222a84e) 
Shadow bytes around the buggy address:
  0x0c3280040610: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3280040620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3280040630: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c3280040640: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c3280040650: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0c3280040660: fd fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd fd
  0x0c3280040670: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c3280040680: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c3280040690: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c32800406a0: fd fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c32800406b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  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
  Shadow gap:              cc
==259720==ABORTING

Revision: a0db4ef29e70403f5d65dd088df46af2f5a34cea