[issue29096] Signal Handlers reliably cause UnboundLocalErrors

Joe Jevnik added the comment: The issue appears to be in ceval.c:unicode_concatenate (or the py2 equivalent) The code sets the local variable on the lhs to NULL before doing a potentially inplace append to the string. This means that if a signal is raised during the concat, we never hit the ST

[issue29096] Signal Handlers reliably cause UnboundLocalErrors

Ted Meyer added the comment: Sorry everyone, it appears I made a mistake pasting the code in here. There was a type where I was trying to print local_val instead of local_var. the code should be this: import signal def sig_hdlr(signum, frame): raise ValueError() def faulty(): local_va

[issue29096] Signal Handlers reliably cause UnboundLocalErrors

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[issue29096] Signal Handlers reliably cause UnboundLocalErrors

New submission from Ted Meyer: Using this simple snippit of code: import signal import signal def sig_hdlr(signum, frame): raise ValueError() def faulty(): local_var = "" signal.signal(signal.SIGALRM, sig_hdlr) signal.alarm(1) try: while True: local_va