Re: [ID 20000124.004] "perl in malloc(): warning: recursive call" on

[Ilya Zakharevich <ilya@math.ohio-state.edu>]

Lars Eggert writes:
> Running the following test script causes perl to crash. You may need
> to run the script several times before seeing the problem. (The script
> spawns a child process that does nothing but write to an array. The
> parent signals the child periodically.)

Signals and Perl do not mix.  Please do not use signals if a segfault
is not a desirable form of output.

>   $SIG{ALRM} = sub { $state++ };

One should not do anything as bad as that in a sighandler.  What is
the failure rate you see?  You may get slightly better rate (3% in my
tests) with something like

$SIG{ALRM} = sub { ++$state ; return };

and preallocating 

  $state = 0;

Ilya

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Follow-Ups from:

Lars Eggert <larse@ISI.EDU>

References to:

Lars Eggert <larse@ISI.EDU>

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