Re: Signal::StackTrace not working?

[Athanasius]

Hello perlancar,

I’m seeing the same behaviour on Windows. I think the problem is that the trace is given from the vantage point of the statement immediately following the statement that was in effect when the signal was received. I played around with the following script:

#!perl
use strict;
use warnings;
use Signal::StackTrace::CarpLike qw( INT );

f();
print "After f()\n";

sub f { g(); }
sub g
{
    sleep 5;
    print "In g(), after sleep\n";
}

Output:

13:05 >perl 1052_SoPW.pl
INT at 1052_SoPW.pl line 13.
        eval {...} called at 1052_SoPW.pl line 13
        main::g() called at 1052_SoPW.pl line 9
        main::f() called at 1052_SoPW.pl line 6
In g(), after sleep
After f()

13:05 >

Note the line number: line 13 is the print statement following sleep. And with that print statement commented out:

13:05 >perl 1052_SoPW.pl
INT at 1052_SoPW.pl line 7.
        eval {...} called at 1052_SoPW.pl line 7
After f()

13:07 >

The INT signal is now reported as having been received after sub g returned, because sleep happened to be the last statement in the sub. And the stack trace shown is correct as from the viewpoint of line 7.

This looks like a fairly serious bug to me.

Hope that helps,