IO::Handle: Fix a spurious error reported for regular file handles #18035
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89341f8 fix for GH Perl#6799 introduced a regression when calling error() on an IO::Handle object that was opened for reading a regular file: $ perl -e 'open my $f, q{<}, q{/etc/hosts} or die; print qq{error\n} if $f->error' error In case of a regular file opened for reading, IoOFP() returns NULL and PerlIO_error(NULL) reports -1. Compare to the case of a file opened for writing when both IoIFP() and IoOFP() return non-NULL, equaled pointer. This patch fixes handling the case of the NULL output stream. GH Perl#18019
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89341f8 fix for GH #6799 introduced a regression when calling error()
on an IO::Handle object that was opened for reading a regular file:
$ perl -e 'open my $f, q{<}, q{/etc/hosts} or die; print qq{error\n} if $f->error'
error
In case of a regular file opened for reading, IoOFP() returns NULL and
PerlIO_error(NULL) reports -1. Compare to the case of a file opened
for writing when both IoIFP() and IoOFP() return non-NULL, equaled
pointer.
This patch fixes handling the case of the NULL output stream.
GH #18019