Issue #7982 has been reported by erik.s.chang (Erik Chang). ---------------------------------------- Bug #7982: rb_raise segfaults on %lli format with (0xffffffff + 1) https://bugs.ruby-lang.org/issues/7982 Author: erik.s.chang (Erik Chang) Status: Open Priority: Normal Assignee: Category: Target version: current: 2.1.0 ruby -v: ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux] This was not a problem on 1.9.3 Run attached "t" extension with: ruby -rt -e '"".blowup(0xffffffff + 1)' to reproduce. Using %lld works around the issue. -- http://bugs.ruby-lang.org/