Is it possible to find the perl line number, with backtrace, if possible, of where the error occurred?

Perl doesn't catch segfaults; so by the time it has occurred, perl has lost control and can do nothing.

Otherwise, maybe I should run Devel::Trace, or something similiar, while testing.

Devel::Trace slows things down horribly and produces reams of output. Try Devel::CallTrace instead.

A faulting program:

#! perl -slw
use strict;

sub segfault {
    my $x = unpack 'P', \ "";
}

sub a { segfault(); }
sub b { a(); }
sub c{ b(); }

c();

[download]

A run under Devel::CallTrace:

C:\test>perl -d:CallTrace junk.pl
 Devel::CallTrace::import (c:/perl64/site/lib/Devel/CallTrace.pm:75-78
+)
 CODE(0x276280)
 CODE(0x2762f8)
  strict::import (c:/perl64/lib/strict.pm:34-37)
 main::c (junk.pl:10-10)
  main::b (junk.pl:9-9)
   main::a (junk.pl:8-8)
    main::segfault (junk.pl:4-6)

[download]

Then, if the faulting subroutine is large, you can enable Devel::Trace on entry and disable it on exit to that one subroutine to get you down to the line number.

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In reply to Re: How to find perl line after segfault. by BrowserUk
in thread How to find perl line after segfault. by Steve_BZ

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