Issue #11109 has been updated by Jeffrey Yang. File bug.rb added Thanks for your fix and advise. I added a `sio.rewind` between `from_bson`. The script works well. I should've realized the EOF issue. Please see also the attached file. By the way, how long does a bugfix be merged into BSON's master branch? ---------------------------------------- Bug #11109: Crash of irb. https://bugs.ruby-lang.org/issues/11109#change-52297 * Author: Jeffrey Yang * Status: Third Party's Issue * Priority: Normal * Assignee: ruby-core * ruby -v: 2.2.2 * Backport: 2.2: UNKNOWN ---------------------------------------- ENV: Mac OS X 10.10.3 ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14] HOW TO COMPILE: 1. cd to the dir of ruby 2.2.2. 2. ./configure 3. make 4. make install as root. STEPS: 1. Start the irb on console. 2. Type the following code lines in irb: ```ruby require 'stringio' require 'bson' sio = StringIO.new 1.to_bson BSON::Int64. from_bson sio ``` 3. The crash happens. Please see also the attached file for all details. ---Files-------------------------------- bug_report.txt (12 KB) bug.rb (151 Bytes) bug.rb (162 Bytes) -- https://bugs.ruby-lang.org/