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==2487==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xf270f0ff at pc 0x56be14a6 bp 0xff94d6b8 sp 0xff94d6ac
READ of size 1 at 0xf270f0ff thread T0
    #0 0x56be14a5 in tok_nextc /home/will/python/cpython/Parser/tokenizer.c:1025:28
    #1 0x56bd9c4a in tok_get /home/will/python/cpython/Parser/tokenizer.c:1457:13
    #2 0x56bdad09 in tok_get /home/will/python/cpython/Parser/tokenizer.c:1524:34
    #3 0x56bd926a in PyTokenizer_Get /home/will/python/cpython/Parser/tokenizer.c:1804:18
    #4 0x56bd4a37 in parsetok /home/will/python/cpython/Parser/parsetok.c:208:16
    #5 0x56bd6391 in PyParser_ParseFileObject /home/will/python/cpython/Parser/parsetok.c:134:12
    #6 0x56a84e9b in PyParser_ASTFromFileObject /home/will/python/cpython/Python/pythonrun.c:1150:15
    #7 0x56a85ac7 in PyRun_FileExFlags /home/will/python/cpython/Python/pythonrun.c:916:11
    #8 0x56a83b28 in PyRun_SimpleFileExFlags /home/will/python/cpython/Python/pythonrun.c:396:13
    #9 0x56a83336 in PyRun_AnyFileExFlags /home/will/python/cpython/Python/pythonrun.c:80:16
    #10 0x5678a224 in run_file /home/will/python/cpython/Modules/main.c:318:11
    #11 0x5678a224 in Py_Main /home/will/python/cpython/Modules/main.c:768
    #12 0x56783100 in main /home/will/python/cpython/./Programs/python.c:69:11
    #13 0xf7555496 in __libc_start_main (/usr/lib32/libc.so.6+0x18496)
    #14 0x566bc5e7 in _start (/home/will/python/cpython/python+0xf85e7)

0xf270f0ff is located 1 bytes to the left of 8194-byte region [0xf270f100,0xf2711102)
allocated by thread T0 here:
    #0 0x56757814 in realloc (/home/will/python/cpython/python+0x193814)
    #1 0x567845d1 in _PyMem_RawRealloc /home/will/python/cpython/Objects/obmalloc.c:84:12
    #2 0x56783596 in PyMem_Realloc /home/will/python/cpython/Objects/obmalloc.c:343:12
    #3 0x56bdffac in tok_nextc /home/will/python/cpython/Parser/tokenizer.c:1058:31
    #4 0x56bd9559 in tok_get /home/will/python/cpython/Parser/tokenizer.c:1354:17
    #5 0x56bd926a in PyTokenizer_Get /home/will/python/cpython/Parser/tokenizer.c:1804:18
    #6 0x56bd4a37 in parsetok /home/will/python/cpython/Parser/parsetok.c:208:16
    #7 0x56bd6391 in PyParser_ParseFileObject /home/will/python/cpython/Parser/parsetok.c:134:12
    #8 0x56a84e9b in PyParser_ASTFromFileObject /home/will/python/cpython/Python/pythonrun.c:1150:15
    #9 0x56a85ac7 in PyRun_FileExFlags /home/will/python/cpython/Python/pythonrun.c:916:11
    #10 0x56a83b28 in PyRun_SimpleFileExFlags /home/will/python/cpython/Python/pythonrun.c:396:13
    #11 0x56a83336 in PyRun_AnyFileExFlags /home/will/python/cpython/Python/pythonrun.c:80:16
    #12 0x5678a224 in run_file /home/will/python/cpython/Modules/main.c:318:11
    #13 0x5678a224 in Py_Main /home/will/python/cpython/Modules/main.c:768
    #14 0x56783100 in main /home/will/python/cpython/./Programs/python.c:69:11
    #15 0xf7555496 in __libc_start_main (/usr/lib32/libc.so.6+0x18496)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/will/python/cpython/Parser/tokenizer.c:1025:28 in tok_nextc
Shadow bytes around the buggy address:
  0x3e4e1dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3e4e1dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3e4e1de0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3e4e1df0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3e4e1e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x3e4e1e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa[fa]
  0x3e4e1e20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3e4e1e30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3e4e1e40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3e4e1e50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3e4e1e60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==2487==ABORTING