Getting "No error" instead of "No such file or directory" on Win32

[Shlomi Fish]

Hi all,

in this CPAN testers XML-LibXML test failure:

http://www.cpantesters.org/cpan/report/d9cf95fc-d5e8-1017-8e8a-88a105085451

I am getting this:

[QUOTE]
t/01basic.t ......................... ok

# Failed test 'error parsing non-existent does_not_exist.xml'
# at t/02parse.t line 238.
# 'Could not create file parser context for file "does_not_exist.xml": No error at t/02parse.t line 237.
# '
# doesn't match '(?-xism:\ACould not create file parser context for file "does_not_exist\.xml": No\ such\ file\ or\ directory)'
# Looks like you failed 1 test of 531.
t/02parse.t .........................
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/531 subtests

[/QUOTE]

My question is - why?

Regards,

Shlomi Fish

[Michael G Schwern]

Post by Shlomi Fish
[QUOTE]
t/01basic.t ......................... ok
# Failed test 'error parsing non-existent does_not_exist.xml'
# at t/02parse.t line 238.
# 'Could not create file parser context for file "does_not_exist.xml": No error at t/02parse.t line 237.
# '
# doesn't match '(?-xism:\ACould not create file parser context for file "does_not_exist\.xml": No\ such\ file\ or\ directory)'
# Looks like you failed 1 test of 531.
t/02parse.t .........................
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/531 subtests
[/QUOTE]
My question is - why?

Some systems stringify an errno value of 0 as "no error". A few things could
have caused this:

1) Something might have set errno to 0 between the failure and the error being
printed. Many I/O operations will do this, some at the OS level.

This could be in the CLEANUP_ERROR_HANDLER or REPORT_ERROR or even inside
xmlCreateFileParserCtxt itself.

2) The failure may not have been the result of an I/O failure causing errno to
never have been set.

Is there a guarantee that xmlCreateFileParserCtxt() sets errno reliably?