New submission from Xinmeng Xia <xi...@smail.nju.edu.cn>:
In issue 42500, recursive calls in "Try-except" are resolved. This PR has fixed
the crashes of some programs, such as program 1. And the core dump error is
replaced with RecursiveError.
However, program 2 will not report a RecursiveError. The program will fall into
an infinite loop. Even "Ctrl C" cannot stop the infinite loop. I try to track
the execution of this program and insert "print" information(see program 3).
The output seems random in execution between try branch and except branch! I
think this is a new bug after fixing 42500. I believe the program should also
return RecursiveError.
Program 1
===========================
def foo():
try:
1/0
except:
foo()
foo()
================================
Program 2
================================
def foo():
try:
foo()
except:
foo()
foo()
================================
Program 3
================================
def foo():
try:
print("a")
foo()
except:
print("b")
foo()
foo()
================================
Output for program3( unexpected infinite random loop. ):
......bbaaaabbabbaabbabbaaabbabbaabbabbaaaaaaaabbabbaabbabbaaabbabbaabbabbaaaabbabbaabbabbaaabbabbaabbabbaaaaabbabbaabbabbaaabbabbaabbabbaaaabbabbaabbabbaaabbabbaabbabbaaaaaabbabbaabbabbaaabbabbaabbabbaaaabb......
>>python -V
Python 3.10.0a4
----------
components: Interpreter Core
messages: 385171
nosy: xxm
priority: normal
severity: normal
status: open
title: Random and infinite loop in dealing with recursion error for "try-except
"
type: behavior
versions: Python 3.10
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42951>
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