Item13423: Perl 5.22 deprecates unescaped left brace in Regular Expressions

The 5.22 introduced new deprecation warnings.

The current trunk emits them at every request many times, depending how much plugins are installed.

Examples:

[Thu May 21 17:43:34 2015] Meta.pm: Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/^%META:TOPICINFO{ <-- HERE .*?}%$/ at /me/fw/sites/devmast/foswiki/core/lib/Foswiki/Meta.pm line 3631.

[Thu May 21 17:43:34 2015] rest: Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/}{ <-- HERE / at /me/fw/sites/devmast/foswiki/core/lib/Foswiki/Configure/LoadSpec.pm line 530.

[Thu May 21 17:43:34 2015] rest: Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/%RDIFF2COMPARE{ <-- HERE "?(.*?)"?}%/ at /me/fw/sites/devmast/foswiki/core/lib/Foswiki/Plugins/CompareRevisionsAddonPlugin.pm line 55.

[Thu May 21 17:43:28 2015] rest: Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(%EDITCELL{ <-- HERE .*?}%)/ at /me/fw/sites/devmast/foswiki/core/lib/Foswiki/Plugins/EditRowPlugin/Table.pm line 587.

[Thu May 21 17:43:34 2015] rest: Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/%RENDERLIST{ <-- HERE (.*?)}%\s*(([\n\r]+[^ ]{3}[^\n\r]*)*?)(([\n\r]+ {3}[^\n\r]*)+)/ at /me/fw/sites/devmast/foswiki/core/lib/Foswiki/Plugins/RenderListPlugin.pm line 84.

many many others. The error-log growing very very fast.

-- JozefMojzis - 21 May 2015

Marking this urgent for 1.2, we can address while workikng to stabilize the unicode core work.

-- GeorgeClark - 21 May 2015

Reopen if any more regex issues encountered.

-- GeorgeClark - 23 Jun 2015

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