Bug 981944

Summary:	compare exits with a non-zero exit code when no error occurred
Product:	[Fedora] Fedora	Reporter:	Tom Hughes <tom>
Component:	ImageMagick	Assignee:	Pavel Alexeev <pahan>
Status:	CLOSED UPSTREAM	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	nmurray, pahan
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2013-07-10 20:42:53 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Tom Hughes 2013-07-07 08:44:28 UTC

Description of problem:

In rawhide the ImageMagick compare command line tool exits with a non-zero exit code (specifically an exit code of one) even when everything worked fine.

Version-Release number of selected component (if applicable):

ImageMagick-6.8.6.3-1.fc20.x86_64

How reproducible:

Every time.

Steps to Reproduce:

rawhide [~] % compare image.jpg image.jpg /tmp/diff.jpg
rawhide [~] % echo $?
1

Actual results:

1

Expected results:

0

Additional info:

This works fine in F19 with ImageMagick 6.7.8.9.

Comment 1 Pavel Alexeev 2013-07-10 20:42:53 UTC

Thank you for the bugreport and willing make free software better.

Problem reported upstream: http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=23722

Comment 2 Pavel Alexeev 2013-07-15 18:41:49 UTC

Got upstream answer:
A perfect match for -metric ncc is 1 and not zero. If the user wants that default, then just add -metric ncc until the issue is resolved

see http://www.imagemagick.org/Usage/compare/#statistics