This is caused by the 'safe signals' that were introduced by 5.8.0. The sleep is treated a single opcode and so the signal is not seen until after the opcode completes. See the 'safe signals' section of perl58delta. Also see perl581delta for how to bypass this and get the old unsafe behaviour back. 

c:\test>set PERL_SIGNALS=unsafe

c:\test>p1
[0] Perl> $SIG{ INT } = sub{ print 'Caught signal INT'; };;
[0] Perl> print 'still here' while sleep 10;;
still here
Caught signal INT
still here
Terminating on signal SIGBREAK(21)

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Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: win32, ctrl-c, sleep, and signals by BrowserUk
in thread win32, ctrl-c, sleep, and signals by SirBones

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