Issue #5024 has been updated by nobu (Nobuyoshi Nakada). Category set to misc Status changed from Assigned to Third Party's Issue ---------------------------------------- Bug #5024: ruby-mode.el syntax highlighting breaks on regular expression with quotes https://bugs.ruby-lang.org/issues/5024#change-34344 Author: slickrobert (Robert Smith) Status: Third Party's Issue Priority: Normal Assignee: nobu (Nobuyoshi Nakada) Category: misc Target version: 1.9.2 ruby -v: 1.9.2-p180 revision 30909 I am using 1.9.2-p160 revision 29036 If there are an odd number of quotation marks inside a regular expression, the syntax highlighting breaks, continuing the regular expression color until another quotation mark is found. method /^"([^"]*)"$/ do |arg| # continues regular expression syntax color until quotation is matched Syntax continues to work correctly with parentheses around the method, such as method(/^"([^"]*)"$/) do |arg| Searching led me to a related bug that was fixed: http://redmine.ruby-lang.org/issues/show/4242 -- http://bugs.ruby-lang.org/