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Re: The number of ways I've independently discovered to make Perl segfault:

by scrottie (Scribe)
on Sep 28, 2003 at 12:16 UTC ( #294735=note: print w/ replies, xml ) Need Help??


in reply to The number of ways I've independently discovered to make Perl segfault:

sub f { my $x = shift; *z = $x; } f({}); f();
Dave Mitchell solved this within a week and gave this description: "the second call to f() has $x as type RV (due to the previous call), but !ROK - due to the undef assignment. sv_setsv_flags() didn't check for ROK in this context." This was discovered while writing Object::Lexical. It stuffs closures into a stash created to represent an object - each object is its own blessed stash. I assumed (incorrectly) that the problem had something to do with blessing stashes. The fix is in 5.8.1. Hats off to the Perl 5 Porters! You guys rock! -scott


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