ambrus reported a similar error recently in the Chatterbox and subsequently submitted perlbug #42029 to p5p (and to RT.perl.org (#42029). It seems that the following alone is enough to crash bleadperl and maintperl:

perl -e 'warn readline'

[download]

You might want to append your report to that bug.

In reply to Re: Check core dump with new Perl by Corion
in thread Check core dump with new Perl by bsb

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