[issue14230] Delegating generator is not always visible to debugging tools such as inspect & pdb

[Mark Shannon]

New submission from Mark Shannon <mark at hotpy.org>:

Delegating generators do not show always up in stack traces, such as inspect.stack().
The show up during the first delegation, but not thereafter.

I have attached a patch. It alters the way the YIELD_FROM bytecode works; it loops back on itself. This ensures the delegator's frame is always in the trace.

Unfortunately I started working on it before Benjamin fixed issue 14220
(rev 3357eac1ba62). By the nature of it, this patch necessarily fixes most of issue  14220, so I have just included the tests for issue 14220
in this patch as well.
So in order to apply this, 3357eac1ba62 will have to be backed out.
Sorry for the overlap.

----------
components: Interpreter Core
files: yieldfrom.patch
keywords: patch
messages: 155182
nosy: Mark.Shannon
priority: normal
severity: normal
status: open
title: Delegating generator is not always visible to debugging tools such as inspect & pdb
type: behavior
versions: Python 3.3
Added file: http://bugs.python.org/file24759/yieldfrom.patch

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