New submission from almenon anon <almenon...@gmail.com>:
Code that runs fine in the command line can crash in the debugger Note that because https://bugs.python.org/issue10933 is not fixed yet I'm assuming this applies to all python 3 versions but it was confirmed in python 3.6 See https://github.com/microsoft/ptvsd/issues/1379: @fabioz says it better than I could: > This is really a CPython bug, not ptvsd (CPython is crashing because of a > stack overflow when the stack overflow is thrown inside a tracing function -- > because the user code already recursed too much). > As a note, the debugger is even disabled on the face of a stack overflow > (see: https://bugs.python.org/issue10933), so, even if it didn't crash, > things wouldn't work very well from that point onwards... > Maybe we could try to detect that a stack overflow is about to happen and > notify about it right before it happens in the debugger so that users could > know that the debugger would stop (note that this is actually pretty hard to > do from the debugger without killing performance because we don't have a > stack in the debugger as we try to run with frames untraced whenever possible > and I don't think there's a python API that provides the size of the stack in > a fast way -- but maybe I'm wrong, I haven't investigated much). > As a note, the ideal place for that would probably be in CPython itself (when > it got to that condition it could raise the recursion limit a bit and call a > handler or at least give some warning if configured to do so as it can be > really puzzling to know that the tracing got disabled because of a swallowed > StackOverflow). > So, I'm going to rename this issue to Deal better with StackOverflow in > CPython so that it reflects better the issue at hand, but it's not currently > high-priority -- that's really a bug in CPython itself and is probably better > fixed there (the workaround in user code -- in this case foxdot -- is not > throwing a StackOverflow). ---------- components: Interpreter Core messages: 351107 nosy: almenon anon priority: normal severity: normal status: open title: Deal better with StackOverflow exception when debugging type: crash versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38023> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
