From @jkeenan

This was first reported to me off list by Carlos Guevara, based on his
smoke testing rigs.

http://matrix.cpantesters.org/?dist=Data-Alias

http://matrix.cpantesters.org/?dist=Syntax-Keyword-Try

Carlos also reported that test(s) in the latter distro hung. I can
confirm that on FreeBSD-11, Syntax::Keyword::Try's test t/11loop.t hung
indefinitely and had to be Ctrl-C-ed for smoking to proceed. I was
consequently not able to get a definitive bisection for that module.

On Linux I was able to bisect the problem with Data::Alias to:

f23e164367e8b9494783181262bf4a1a16d26961 is the first bad commit
commit f23e164367e8b9494783181262bf4a1a16d26961
Author: David Mitchell <davem@iabyn.com>
Date: Tue Jun 18 15:11:12 2019 +0100

Perl_list() tail-call optimise

The part of this function that scans the children of e.g.

@a = do { void; void; list }

applying list context only to the last child, tail call
optimise that call to list().

(See also a few commits later entitled "Perl_scalar()
tail-call optimise" for a discourse on setting PL_curcop
(in)correctly.)

:100644 100644 77dc177ec9bfd8c488d2a62aacaaaedc4f2658b7
a30740f2a5a449b1644665331ba560cbc9c167ee M op.c
#####

No further diagnose yet attempted.

Thank you very much.
Jim Keenan

perl perl perl

From @jkeenan

On Tue, 02 Jul 2019 03​:02​:02 GMT, jkeenan@​pobox.com wrote​:

This was first reported to me off list by Carlos Guevara, based on his
smoke testing rigs.

http​://matrix.cpantesters.org/?dist=Data-Alias

http​://matrix.cpantesters.org/?dist=Syntax-Keyword-Try

Carlos also reported that test(s) in the latter distro hung. I can
confirm that on FreeBSD-11, Syntax​::Keyword​::Try's test t/11loop.t hung
indefinitely and had to be Ctrl-C-ed for smoking to proceed. I was
consequently not able to get a definitive bisection for that module.

Discussion of the hanging test in Syntax​::Keyword​::Try's test suite is moved to #17076.

Thank you very much.

--
James E Keenan (jkeenan@​cpan.org)

The RT System itself - Status changed from 'new' to 'open'

@jkeenan Is there something left to discuss here then?

We reported the breakage to Data::Alias in its bugtracker. However, the author has not yet responded. So the ticket is not closable. We should review its status as we get closer to 5.32.0 release.

I reached out to the maintainer. I don't know if I'll get a response. Still not sure what decision to make here.

At the moment, I'm thinking of making this a non-blocker. The author is w5ill non-responsive, and there's only so far we can go without responsiveness.

A few modules are dependent on this, but not enough to break CPAN considerably.

At the moment, I'm thinking of making this a non-blocker. The author is w5ill non-responsive, and there's only so far we can go without responsiveness.

A few modules are dependent on this, but not enough to break CPAN considerably.

Has @iabyn (the original committer) commented on this yet?

This was eventually fixed, latest Data::Alias shows no problems. Closing ticket.

This was eventually fixed, latest Data::Alias shows no problems. Closing ticket.

Confirmed. Thanks.