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New Diagnostics

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New Diagnostics

Several new conditions will trigger warnings that were silent before. Some only affect certain platforms. The following new warnings and errors outline these. These messages are classified as follows (listed in increasing order of desperation):

   (W) A warning (optional).
   (D) A deprecation (optional).
   (S) A severe warning (mandatory).
   (F) A fatal error (trappable).
   (P) An internal error you should never see (trappable).
   (X) A very fatal error (nontrappable).
   (A) An alien error message (not generated by Perl).

Source: what's new for perl5.004
Copyright: Larry Wall, et al.
Next: my variable %s masks earlier declaration in same scope

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