If a sub named Dumperrrrrrrrrr exists, then 

print Dumperrrrrrrrrr $myvar;

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means 
print( Dumperrrrrrrrrr( $myvar ) );

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But there is no sub named Dumperrrrrrrrrr, so 

print Dumperrrrrrrrrr $myvar;

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means 
print( Dumperrrrrrrrrr $myvar );  # File handle and thing to print.

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print tries to write to Dumperrrrrrrrrr, but no file handle is associated with that symbol, so it returns false.

You can use no feature qw( bareword_filehandles ); (5.34+) to detect these errors. use v5.38; (5.38+) also does the trick (plus more).

In reply to Re: No error from typo [was: Perl doesn't give error when module is not found] by ikegami
in thread Perl doesn't give error when module is not found by Anonymous Monk

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