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Hello wise monks,

I'm unsure why these two lines produce different output. In particular, I don't know why the ${^MATCH} in the first line fails to be set to the matched part of the regular expression.
perl -e '$x = "abcde"; $x =~ s/b../==${^MATCH}==/p; print + "$x\n"' perl -e '$x = "abcde"; $sub="b.."; $x =~ s/$sub/==${^MATCH}==/p; print + "$x\n"'
Perl v5.12.4 produces:
a====e a==bcd==e
The perlre documentation gives no restrictions on contexts in which {^MATCH} can be used, saying only that it's an optimized synonym for $&. And in fact, if I change the first line to use $& instead of {^MATCH}, it behaves as expected. Thank you for any hints!

In reply to ${^MATCH} sometimes fails in target of substitution? by raygun

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    [Corion]: Also, that likely means we'll get a newer Perl, so we could then move the codebase to newer features ;)
    [Discipulus]: urrah!
    [marto]: Hmm, I sometimes wonder if moving to a new framework (such as mojo) would encourage more developers
    [Corion]: marto: Yes, that's the long game, but before that, I want to move away from our custom source code control and move to git, and before that, I want to get the test environment back up running. I have it running at home, but I want/need to set it up ...
    [Corion]: ... on a public host again.
    [Discipulus]: for sure, but who'll make the initial migration?
    [ambrus]: hi all
    [Corion]: I don't think that Mojo or whatever would bring much, as the site is heavy on nested templates, but there are some things that could/should be eliminated ;)
    [Corion]: Hi ambrus!
    [marto]: I'd be interested in seeing the schema and some test data. I think the move could be done in stages.

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