This has been an interesting thread so out of curiosity I happened to check on the bug report. According to Dave Mitchell:
Thanks for the report. This is fixed in perl 5.9.5 onwards, probably by change #31203. PL_in_my wasn't being re-initialised at the start of the eval, so '$string' was being misinterpreted as 'my $string'.
Looks like Somni had it right in Re: Bug : eval and accent.

In reply to Re^4: Bug : eval and accent by Argel
in thread Bug : eval and accent by sylvanus_monachus

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