From: fredngo@... Date: 2016-01-19T04:46:54+00:00 Subject: [ruby-core:72925] [Ruby trunk - Bug #11946] Assertion failed: (!STR_EMBED_P(shared)), function str_new_frozen, file string.c, line 1075. Issue #11946 has been updated by Fred Ngo. Confirming for me also. I have traced the problem to this line: https://github.com/rails/rails/blob/v4.2.5/actionpack/lib/action_dispatch/routing/route_set.rb#L546 in the call to name.to_s.match(/^[_a-z]\w*$/i). Specifically, when match() is called. The strange thing is that when I substitute name.to_s.freeze.match(/^[_a-z]\w*$/i) then it passes without the core dump failure. The other thing is that this line doesn't always fail, it only fails on some routes. I have no idea why, because the name is always a string class, and a valid string. Ruby 2.3.0 Rails 4.2.5 As Felix says, this is no a problem with Ruby 2.2.4. ---------------------------------------- Bug #11946: Assertion failed: (!STR_EMBED_P(shared)), function str_new_frozen, file string.c, line 1075. https://bugs.ruby-lang.org/issues/11946#change-56154 * Author: Felix Mohnert * Status: Open * Priority: Normal * Assignee: Nobuyoshi Nakada * ruby -v: 2.3.0 * Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN ---------------------------------------- Starting the Rails server or running specs for one of our applications results in: ~~~ Assertion failed: (!STR_EMBED_P(shared)), function str_new_frozen, file string.c, line 1075. Abort trap: 6 ~~~ Previous Ruby versions didn't cause a problem. I wasn't able to to find out what exactly causes it, if you know how to produce a better log here, I'm glad to provide it. -- https://bugs.ruby-lang.org/ Unsubscribe: