On 21 Jul 2014, at 09:25, Carl Mäsak (via RT) <perl6-bugs-follo...@perl.org> wrote: > # New Ticket Created by "Carl Mäsak" > # Please include the string: [perl #122355] > # in the subject line of all future correspondence about this issue. > # <URL: https://rt.perl.org/Ticket/Display.html?id=122355 > > > > <hoelzro> in Perl 5, one can assign to $? in an END block to alter a > program's exit status. Is there an analogous construct in Perl 6? > <masak> hoelzro: `exit($status);` > <masak> hm, `END exit(5)` hangs locally. > <hoelzro> masak: that's what I tried, and also discovered =) > <masak> r: END exit(5) > <camelia> rakudo-{parrot,moar} e56d94: OUTPUT«(timeout)» > <camelia> ..rakudo-jvm e56d94: OUTPUT«(timeout)Unhandled exception: > java.lang.StackOverflowError [...] > * masak submits rakudobug > > Moar and Parrot loop forever; the JVM blows the call stack. My guess > is that a call to &exit tries to run all the registered END blocks or > something. > > I don't recall the spec mentioning this, but it feels fairly obvious > to me that we should support calling &exit from an END block, and that > it should Just Work. We probably should have wording in S32 to that > effect.
FWIW, I think the problem is that running the END blocks does not remove them from the list of END blocks. Each END block should only be run *once*. Hence, execution of an END block should remove it from the list *before* executing it. Pretty sure that would solve this problem. Liz
