[issue23048] abort when jumping out of a loop

[Xavier de Gaye]

Xavier de Gaye added the comment:

> Building on OS X 10.10 with the head of the code tree (as of today), I cannot 
> reproduce this.  Also the disassembly looks fine:

I should have mentionned that I am running a debug build of python.

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[issue23048] abort when jumping out of a loop

[Roundup Robot]

Roundup Robot added the comment:

New changeset 09f938915c6f by Benjamin Peterson in branch '3.4':
pop the loop block even for infinite while loops (closes #23048)
https://hg.python.org/cpython/rev/09f938915c6f

New changeset baa5258bef22 by Benjamin Peterson in branch '2.7':
pop the loop block even for infinite while loops (closes #23048)
https://hg.python.org/cpython/rev/baa5258bef22

New changeset ec96ffa6aa95 by Benjamin Peterson in branch 'default':
merge 3.4 (#23048)
https://hg.python.org/cpython/rev/ec96ffa6aa95

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nosy: +python-dev
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue23048] abort when jumping out of a loop

[Benjamin Peterson]

Changes by Benjamin Peterson :


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assignee:  -> benjamin.peterson
nosy: +benjamin.peterson

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[issue23048] abort when jumping out of a loop

[Raymond Hettinger]

Raymond Hettinger added the comment:

Building on OS X 10.10 with the head of the code tree (as of today), I cannot 
reproduce this.  Also the disassembly looks fine:

$ python3.5 jump.py 
> /Users/raymond/tmp/jump.py(3)foo()
-> while 1:
(Pdb) next
> /Users/raymond/tmp/jump.py(4)foo()
-> pass
(Pdb) jump 5
> /Users/raymond/tmp/jump.py(5)foo()
-> return # this is line 5
(Pdb) list
  1 def foo():
  2 import pdb; pdb.set_trace()
  3 while 1:
  4 pass
  5  -> return # this is line 5
  6 
  7 foo()
  8 
[EOF]
(Pdb) !from dis import dis
(Pdb) !dis(foo)
  2   0 LOAD_CONST   1 (0)
  3 LOAD_CONST   0 (None)
  6 IMPORT_NAME  0 (pdb)
  9 STORE_FAST   0 (pdb)
 12 LOAD_FAST0 (pdb)
 15 LOAD_ATTR1 (set_trace)
 18 CALL_FUNCTION0 (0 positional, 0 keyword pair)
 21 POP_TOP

  3  22 SETUP_LOOP   3 (to 28)

  4 >>   25 JUMP_ABSOLUTE   25

  5 >>   28 LOAD_CONST   0 (None)
 31 RETURN_VALUE
(Pdb) !import sys
(Pdb) p sys.version_info
sys.version_info(major=3, minor=5, micro=0, releaselevel='alpha', serial=0)

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nosy: +rhettinger

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[issue23048] abort when jumping out of a loop

[Xavier de Gaye]

New submission from Xavier de Gaye:

With the following jump.py script:
def foo():
import pdb; pdb.set_trace()
while 1:
pass
return # this is line 5

foo()


The following debugging session aborts on Python 3.5.0a0 (default:334c01aa7f93, 
Dec  3 2014, 16:20:19):
$ python jump.py
> /tmp/test/jump.py(3)foo()
-> while 1:
(Pdb) next
> /tmp/test/jump.py(4)foo()
-> pass
(Pdb) jump 5
python: Objects/frameobject.c:258: frame_setlineno: Assertion `blockstack_top 
== 0' failed.
Aborted (core dumped)

--
components: Interpreter Core
messages: 232604
nosy: xdegaye
priority: normal
severity: normal
status: open
title: abort when jumping out of a loop
type: crash
versions: Python 3.5

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