From: "Radosław Bułat" Date: 2008-01-14T06:12:07+09:00 Subject: [BUG]Very strange bug which causes segmentation fault. I found very, very strange bug in ruby 1.9. I've discovered that executing my ~/.irbrc file causes segmentation fault. I've tried to cut down source but I failed. Every time I do very small change (for example delete some method definition) bug doesn't appear. Even if I remove some gem (which is not used at all!) bug doesn't appear. So I describe all steps to reproduce this bug, because I have to small knowledge to spy this bug. I've filed this bug also on rubyforge Ruby bugs tracker (http://rubyforge.org/tracker/index.php?func=detail&aid=16679&group_id=426&atid=1698). STEP TO REPRODUCE * Check out new version of ruby (I've tried with 15010 revision), compile and install to some directory (--prefix and --program-suffix option are useful, I've used --prefix=/home/radarek/opt, --program-suffix=1.9). It's very important to use clean ruby installation (I'll explain later). * Install some gems, gem1.9 install GEM (small digression: I've fetched and installed it manually, 'gem install ...' has some problems with installation) - wirble - utility_belt * Patch wirble.rb (you find it in wirble gem directory) with http://code.tie-rack.org/cms/wirble/wirble.rb_no_more_1.9_errors.patch file. * Download my .irbrc file from: http://rubyforge.org/tracker/download.php/426/1698/16679/3103/.irbrc. Try run this file. * Execute .irbrc file When I execute it I have following errors: Loaded suite .irbrc Started .. Finished in 0.000714944 seconds. 2 tests, 3 assertions, 0 failures, 0 errors :126: [BUG] Segmentation fault ruby 1.9.0 (2008-01-13 revision 0) [x86_64-linux] -- control frame ---------- c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP :126 --------------------------- -- backtrace of native function call (Use addr2line) -- 0x4acccf 0x4cb14e 0x4cb2a1 0x47d7b3 0x2b657ff05100 0x7f6420 ------------------------------------------------------- Aborted (core dumped) But there are some weird things: - when I comment out some method definition (which are not used), for example 'ri', 'qri' and run again - bugs doesn't appear - when I manually delete utility_belt gem directory and run again - bugs doesn't appear (look at the .irbrc source file, 'require "utility_belt" is commented out!) - sometimes (but very rarely, maybe 5% chance) everything is ok Can anyone reproduce it? -- Rados�aw Bu�at http://radarek.jogger.pl - m�j blog