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List:       apache-httpd-bugs
Subject:    [Bug 57641] New: mod_substitute: Invalid merge order
From:       bugzilla () apache ! org
Date:       2015-02-27 12:55:09
Message-ID: bug-57641-7868 () https ! bz ! apache ! org/bugzilla/
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https://bz.apache.org/bugzilla/show_bug.cgi?id=57641

            Bug ID: 57641
           Summary: mod_substitute: Invalid merge order
           Product: Apache httpd-2
           Version: 2.5-HEAD
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: mod_substitute
          Assignee: bugs@httpd.apache.org
          Reporter: marc.stern@approach.be

httpd - and all modules - use the same order to merge the options and execute
the related actions:
 - global scope
 - vhost scope
 - location scope (in sequential order)

mod_substitute execute the actions the other way around:
 - location scope (in sequential order)
 - vhost scope
 - global scope

This is incompatible with the logic used by the whole project.

Details of the code:
in merge_substitute_dcfg(), we have
 a->patterns = apr_array_append(p, over->patterns, base->patterns);
This should be
 a->patterns = apr_array_append(p, base->patterns, over->patterns);

The problem lies in all versions

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