New submission from Jelle Zijlstra <jelle.zijls...@gmail.com>:
$ gdb ./python
...
(gdb) r
...
Python 3.9.0b1 (tags/v3.9.0b1:97fe9cfd9f8, May 30 2020, 05:26:48)
...
>>> import io
>>> io.FileIO(0).name
0
>>>
Program received signal SIGSEGV, Segmentation fault.
_PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:100
100 return tstate->interp;
(gdb) bt
#0 _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:100
#1 PyOS_InterruptOccurred () at ./Modules/signalmodule.c:1785
#2 0x0000000000673905 in my_fgets (buf=buf@entry=0xa40780 "8LJ\367\377\177",
len=len@entry=100, fp=fp@entry=0x7ffff74a48e0 <_IO_2_1_stdin_>) at
Parser/myreadline.c:87
#3 0x000000000067397b in PyOS_StdioReadline
(sys_stdin=sys_stdin@entry=0x7ffff74a48e0 <_IO_2_1_stdin_>,
sys_stdout=sys_stdout@entry=0x7ffff74a5620 <_IO_2_1_stdout_>,
prompt=prompt@entry=0x7ffff6f8d8e0 ">>> ") at Parser/myreadline.c:269
#4 0x0000000000673b4f in PyOS_Readline (sys_stdin=0x7ffff74a48e0
<_IO_2_1_stdin_>, sys_stdout=0x7ffff74a5620 <_IO_2_1_stdout_>,
prompt=0x7ffff6f8d8e0 ">>> ") at Parser/myreadline.c:355
#5 0x00000000005d90d9 in tok_nextc (tok=0xa3fd30) at Parser/tokenizer.c:856
#6 0x00000000005dad02 in tok_get (tok=tok@entry=0xa3fd30,
p_start=p_start@entry=0x7fffffffd508, p_end=p_end@entry=0x7fffffffd510) at
Parser/tokenizer.c:1194
#7 0x00000000005dcb69 in PyTokenizer_Get (tok=0xa3fd30,
p_start=p_start@entry=0x7fffffffd508, p_end=p_end@entry=0x7fffffffd510) at
Parser/tokenizer.c:1842
#8 0x0000000000653c73 in _PyPegen_fill_token (p=0x7ffff6f8f540) at
Parser/pegen/pegen.c:551
#9 0x0000000000670355 in statement_newline_rule (p=0x7ffff6f8f540) at
Parser/pegen/parse.c:1143
#10 interactive_rule (p=0x7ffff6f8f540) at Parser/pegen/parse.c:725
#11 _PyPegen_parse (p=p@entry=0x7ffff6f8f540) at Parser/pegen/parse.c:19388
#12 0x0000000000654b32 in _PyPegen_run_parser (p=0x7ffff6f8f540) at
Parser/pegen/pegen.c:1037
#13 0x0000000000654e4c in _PyPegen_run_parser_from_file_pointer
(fp=fp@entry=0x70f74a48e0, start_rule=start_rule@entry=80,
filename_ob=filename_ob@entry=0x7ffff6f84eb0,
enc=enc@entry=0x7ffff704ec60 "utf-8", ps1=ps1@entry=0x7ffff6f8d8e0 ">>> ",
ps2=ps2@entry=0x90000000d0 <error: Cannot access memory at address
0x90000000d0>, flags=0x7fffffffd7b8,
errcode=0x7fffffffd6e4, arena=0x7ffff6ff6b30) at Parser/pegen/pegen.c:1097
#14 0x00000000005d6bea in PyPegen_ASTFromFileObject (fp=0x70f74a48e0,
fp@entry=0x7ffff74a48e0 <_IO_2_1_stdin_>,
filename_ob=filename_ob@entry=0x7ffff6f84eb0, mode=80, mode@entry=256,
enc=enc@entry=0x7ffff704ec60 "utf-8", ps1=ps1@entry=0x7ffff6f8d8e0 ">>> ",
ps2=0x90000000d0 <error: Cannot access memory at address 0x90000000d0>,
ps2@entry=0x7ffff6f8dbe0 "... ",
flags=<optimized out>, errcode=<optimized out>, arena=<optimized out>) at
Parser/pegen/peg_api.c:52
#15 0x00000000005460d9 in PyRun_InteractiveOneObjectEx
(fp=fp@entry=0x7ffff74a48e0 <_IO_2_1_stdin_>,
filename=filename@entry=0x7ffff6f84eb0, flags=flags@entry=0x7fffffffd7b8) at
Python/pythonrun.c:243
#16 0x000000000054631e in PyRun_InteractiveLoopFlags
(fp=fp@entry=0x7ffff74a48e0 <_IO_2_1_stdin_>,
filename_str=filename_str@entry=0x673e32 "<stdin>",
flags=flags@entry=0x7fffffffd7b8)
at Python/pythonrun.c:122
#17 0x0000000000546d4c in PyRun_AnyFileExFlags (fp=0x7ffff74a48e0
<_IO_2_1_stdin_>, filename=0x673e32 "<stdin>", closeit=0, flags=0x7fffffffd7b8)
at Python/pythonrun.c:81
#18 0x0000000000429fb7 in pymain_run_stdin (cf=0x7fffffffd7b8, config=0x9bd800)
at Modules/main.c:467
#19 pymain_run_python (exitcode=0x7fffffffd7b0) at Modules/main.c:556
#20 Py_RunMain () at Modules/main.c:632
#21 0x000000000042a2d6 in pymain_main (args=0x7fffffffd8a0) at
Modules/main.c:662
#22 Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at
Modules/main.c:686
#23 0x00007ffff7100830 in __libc_start_main (main=0x41ef30 <main>, argc=1,
argv=0x7fffffffd9f8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffd9e8)
at ../csu/libc-start.c:291
#24 0x0000000000429089 in _start ()
(gdb)
Same happens with Python 3.9.0b1+ (heads/3.9:588efc29c5d, May 30 2020,
14:16:10) (current HEAD of the 3.9 branch).
In previous versions of Python this would exit the interpreter but not segfault.
----------
keywords: 3.9regression
messages: 370386
nosy: Jelle Zijlstra, benjamin.peterson, stutzbach
priority: normal
severity: normal
status: open
title: Segfaults on io.FileIO(0).name in 3.9
versions: Python 3.10, Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue40826>
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