So it seems that this is an intentional upstream change*.
The perlvar entry for $? now notes that it contains "the 16-bit status
word returned by the traditional Unix wait() system call (or else is
made up to look like it). Thus, the exit value of the subprocess is
really ($? >> 8), and $? & 127 gives which signal, if any, the process
died from, and $? & 128 reports whether there was a core dump."
Unfortunately, a stopped process does not fit these semantics and
moreover the W*() macros expect the un-molested status word as
argument.
You will need to change your code to test ${^CHILD_ERROR_NATIVE}
rather than $? with the W*() macros.
--bod
* http://www.mail-archive.com/perl5-chan...@perl.org/msg11298.html
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