Message 309385 - Python tracker

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In-reply-to
Author	Mark.Shannon
Recipients	Demur Rumed, Mark.Shannon, benjamin.peterson, christian.heimes, mark.dickinson, nascheme, ncoghlan, pitrou, rhettinger, serhiy.storchaka, trent
Date	2018年01月02日.17:13:35
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1514913215.86.0.467229070634.issue17611@psf.upfronthosting.co.za>

Content
> It looks like the build core dumped on Travis-CI I failed to account for the extra stuff left on the stack when handling exceptions and jumping out of a finally block due to a `break`. Caught by Serhiy's tests in https://github.com/python/cpython/pull/5078. I could add a work around, but it would be a bit hacky. I'm now convinced that code duplication is the only way to do this properly. The only real advantage of JSR-style finally blocks is the ease of implementation of `frame.set_lineno()`. Rather than go around in circles any more, I suggest that we merge Serhiy's PR (PR 5006). I can then cherry-pick my commits to clean up the implementation of the `with` statement (as a new PR). I then plan to implement `try-finally` using code duplication, but that might not make it into 3.7 and we shouldn't hold up this issue any longer.

Content

> It looks like the build core dumped on Travis-CI
I failed to account for the extra stuff left on the stack when handling exceptions and jumping out of a finally block due to a `break`. Caught by Serhiy's tests in https://github.com/python/cpython/pull/5078.
I could add a work around, but it would be a bit hacky.
I'm now convinced that code duplication is the only way to do this properly. The only real advantage of JSR-style finally blocks is the ease of implementation of `frame.set_lineno()`.
Rather than go around in circles any more, I suggest that we merge Serhiy's PR (PR 5006). I can then cherry-pick my commits to clean up the implementation of the `with` statement (as a new PR).
I then plan to implement `try-finally` using code duplication, but that might not make it into 3.7 and we shouldn't hold up this issue any longer.

History
Date	User	Action	Args
2018年01月02日 17:13:35	Mark.Shannon	set	recipients: + Mark.Shannon, nascheme, rhettinger, mark.dickinson, ncoghlan, pitrou, christian.heimes, benjamin.peterson, trent, serhiy.storchaka, Demur Rumed
2018年01月02日 17:13:35	Mark.Shannon	set	messageid: <1514913215.86.0.467229070634.issue17611@psf.upfronthosting.co.za>
2018年01月02日 17:13:35	Mark.Shannon	link	issue17611 messages
2018年01月02日 17:13:35	Mark.Shannon	create

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