Assertion failed!
 at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/Assert.pm line 61.
	Assert::ASSERT('') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/Store.pm line 1382
	TWiki::Store::topicExists('TWiki::Store=HASH(0x1e6a728)', 'TWiki', 'TWiki.PatternSkinCustomization') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/Prefs/PrefsCache.pm line 194
	TWiki::Prefs::PrefsCache::loadPrefsFromTopic('TWiki::Prefs::PrefsCache=HASH(0x653b218)', 'TWiki', 'TWiki.PatternSkinCustomization', undef) called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/Prefs/PrefsCache.pm line 125
	TWiki::Prefs::PrefsCache::new('TWiki::Prefs::PrefsCache', 'TWiki::Prefs=HASH(0x237c150)', undef, 'TOPIC', 'TWiki', 'TWiki.PatternSkinCustomization') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/Prefs.pm line 305
	TWiki::Prefs::getTopicPreferencesValue('TWiki::Prefs=HASH(0x237c150)', 'DENYTOPICVIEW', 'TWiki', 'TWiki.PatternSkinCustomization') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/Access.pm line 465
	TWiki::Access::checkAccessPermission('TWiki::Access=HASH(0x2ad3c58)', 'VIEW', 'BaseUserMapping_666', undef, undef, 'TWiki.PatternSkinCustomization', 'TWiki') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki.pm line 2730
	TWiki::_TOC('TWiki=HASH(0x14d1e38)', '---+!! Pattern Skin\x{a}<!--\x{a}   Contributions to this skin are ap...', 'PatternSkin', 'TWiki', '"TWiki.PatternSkinCustomization" title=" "') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki.pm line 3756
	TWiki::handleCommonTags('TWiki=HASH(0x14d1e38)', '---+!! Pattern Skin\x{a}<!--\x{a}   Contributions to this skin are ap...', 'TWiki', 'PatternSkin', 'TWiki::Meta=HASH(0x2ae0a90)') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/UI/View.pm line 485
	TWiki::UI::View::_prepare('---+!! Pattern Skin\x{a}<!--\x{a}   Contributions to this skin are ap...', 'TWiki=HASH(0x14d1e38)', 'TWiki', 'PatternSkin', 'TWiki::Meta=HASH(0x2ae0a90)', 0) called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/UI/View.pm line 469
	TWiki::UI::View::view('TWiki=HASH(0x14d1e38)') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/UI.pm line 204
	TWiki::UI::__ANON__() called at /usr/share/perl5/vendor_perl/Error.pm line 419
	eval {...} called at /usr/share/perl5/vendor_perl/Error.pm line 411
	Error::subs::try('CODE(0x14b6c30)', 'HASH(0x2ad3748)') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/UI.pm line 279
	TWiki::UI::execute('TWiki::Request=HASH(0x1deb9b8)', 'CODE(0x14d26f0)', 'view', 1) called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/UI.pm line 180
	TWiki::UI::handleRequest('TWiki::Request=HASH(0x1deb9b8)') called at /var/www/develop.twiki.org/twiki/twikisvn/core/lib/TWiki/Engine/CGI.pm line 48
	TWiki::Engine::CGI::run('TWiki::Engine::CGI=HASH(0x1aba998)') called at view line 47.