New submission from Xavier de Gaye:
With the following pdb_jump.py script:
def foo(x):
import pdb; pdb.set_trace()
lineno = 3
lineno = 4
foo(1)
The change made to 'x' is lost after a jump to line 4:
$ ./python ~/tmp/test/pdb_jump.py
> ~/tmp/test/pdb_jump.py(3)foo()
-> lineno = 3
(Pdb) x = 123
(Pdb) jump 4
> ~/tmp/test/pdb_jump.py(4)foo()
-> lineno = 4
(Pdb) x
1
(Pdb)
The problem is that the Bdb format_stack_entry() method refers to
frame.f_locals and thus overwrites the changes made to the f_locals dictionary
as the f_locals dictionary is updated from the actual frame locals whenever the
f_locals accessor is called as stated in a comment of the Pdb setup() method.
----------
components: Library (Lib)
messages: 228783
nosy: georg.brandl, xdegaye
priority: normal
severity: normal
status: open
title: local variable changes lost after pdb jump command
type: behavior
versions: Python 3.4, Python 3.5
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Python tracker <[email protected]>
<http://bugs.python.org/issue22577>
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