[New-bugs-announce] [issue29655] Certain errors during IMPORT_STAR can leak a reference

[Peter Cawley]

New submission from Peter Cawley:

In the implementation of the IMPORT_STAR opcode, if the call to PyFrame_FastToLocalsWithError fails, or f_locals is NULL, then control flow jumps to the error handler without performing a decref on the "from" variable. As the "from" variable is initialised by POPping from the stack, the reference is leaked.

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components: Interpreter Core
messages: 288582
nosy: Peter Cawley
priority: normal
severity: normal
status: open
title: Certain errors during IMPORT_STAR can leak a reference
type: behavior
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29655>
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