How do you get Perl to stop and give a stack trace when you reference an undef value, rather than merely warning? It seems that use strict; isn’t sufficient for this purpose.
How do you get Perl to stop and give a stack trace when you
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How do you get Perl to stop and give a stack trace when you reference an undef value, rather than merely warning? It seems that use strict; isn’t sufficient for this purpose.
The first line makes the warning fatal. The next two cause a stack trace when your program dies.
See also
man 3pm warningsfor more details.