From: "enebo (Thomas Enebo)" Date: 2013-04-17T04:59:37+09:00 Subject: [ruby-core:54364] [CommonRuby - Feature #7895] Exception#backtrace_locations to go with Thread#backtrace_locations and Kernel#caller_locations Issue #7895 has been updated by enebo (Thomas Enebo). Has anyone talked about .backtrace returning a subclass of String (or singleton) which duck-types to the same methods as Location? It is arguably hacky and would not work for === but it would still allow them to be used in a compatible way. Or maybe .backtrace_locations provides this special string. If set_backtrace is used it will just be dressed up with this methods it .backtrace (or .backtrace_locations) is called. ---------------------------------------- Feature #7895: Exception#backtrace_locations to go with Thread#backtrace_locations and Kernel#caller_locations https://bugs.ruby-lang.org/issues/7895#change-38639 Author: headius (Charles Nutter) Status: Open Priority: Normal Assignee: Category: Target version: Thread#backtrace_locations and Kernel#caller_locations were added in Ruby 2.0.0, but no equivalent method was added to Exception to get backtrace locations. The String format of Exception#backtrace elements makes it difficult to do any inspection of the actual files and lines it reports, so having backtrace_locations would be very useful. In #7435 ko1 pointed out that Exception defines set_backtrace, which takes an array (presumably of Strings in the same format as Exception#backtrace) and that this would need to be addressed in order to support backtrace_locations. I propose that if you set_backtrace, you are already breaking the ability to get structured Location elements, so set_backtrace should cause backtrace_locations to return nil or an empty array (probably an empty array, so it can always be expected to be non-nil). We could consider also adding set_backtrace_locations as a way to set Location elements into the exception. An example script where backtrace_locations would be very useful is here (avoiding the need to regexp match to get file and line number): https://gist.github.com/headius/4999244 -- http://bugs.ruby-lang.org/