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Something that I find useful for this is diagnostics, which comes with Perl. This pragma is famous for giving verbose explanations for all kinds of errors, but perhaps it is not so well known that it also prints the stack trace upon dying. For example,

# sub a { b(@_) } sub b { c(@_) } sub c { 1/shift }; a(0);

The output:

$ perl
Illegal division by zero at line 4.

$ perl -Mdiagnostics
Illegal division by zero at line 3 (#1)
    (F) You tried to divide a number by 0.  Either something was wrong in
    your logic, or you need to put a conditional in to guard against
    meaningless input.
Uncaught exception from user code:
        Illegal division by zero at line 3.
        main::c(0) called at line 2
        main::b(0) called at line 1
        main::a(0) called at line 4

Update: Note that stack traces for warnings are not printed.

In reply to Re: Automatic stack traces for warns and dies by itub
in thread Automatic stack traces for warns and dies by fergal

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