From: "nagachika (Tomoyuki Chikanaga)" Date: 2013-07-03T12:54:49+09:00 Subject: [ruby-core:55768] [ruby-trunk - Bug #8591][Third Party's Issue] [BUG] Segmentation fault ruby 2.0.0p195 (2013-05-14) [x64-mingw32] Issue #8591 has been updated by nagachika (Tomoyuki Chikanaga). Status changed from Open to Third Party's Issue It seems like a problem of mysql2. see also https://github.com/brianmario/mysql2/issues/372 ---------------------------------------- Bug #8591: [BUG] Segmentation fault ruby 2.0.0p195 (2013-05-14) [x64-mingw32] https://bugs.ruby-lang.org/issues/8591#change-40262 Author: chmel (Josef Chmel) Status: Third Party's Issue Priority: Urgent Assignee: cruby-windows Category: platform/windows Target version: ruby -v: ruby 2.0.0p195 (2013-05-14) [x64-mingw32] Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN rails server crashes with Segmentation fault in pure app created with rails new . after installing mysql2 gem like this gem install mysql2 -v '0.3.12b6' -- --with-opt-dir="C:\work\mysqlconnectorc61" On Windows 7 64b with ruby 2.0 64b in C:\Ruby200-x64 installed by ruby installer rubyinstaller-2.0.0-p195-x64.exe, devkit DevKit-mingw64-64-4.7.2-20130224-1432-sfx.exe and mysql connector mysql-connector-c-6.1.0-winx64.msi. without gem 'mysql2', '~>0.3.12b6' with gem 'sqlite3' server runs fine -- http://bugs.ruby-lang.org/