# Something broke ruby floats **URL:** \ **Category:** Ruby\ **Created:** [November 28, 2009, 6:38pm UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565 "2009-11-28T18:38:39Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Joel\_VanderWerf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e19b73/32.png) [@Joel\_VanderWerf](https://www.ruby-forum.com/u/Joel_VanderWerf)\ **Post date:** [November 28, 2009, 6:38pm UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565/1 "2009-11-28T18:38:39Z")
Noticed this after rebuilding ruby (with configure args –disable-pthread --enable-shared): ~/src/ruby\> RUBYOPT=’’ ./ruby -e ‘x=0.123; puts x’ 123.0 ~/src/ruby\> ldd ./ruby linux-gate.so.1 =\> (0x00b0e000) libruby.so.1.8 =\> /usr/local/lib/libruby.so.1.8 (0x00236000) libdl.so.2 =\> /lib/tls/i686/cmov/libdl.so.2 (0x00132000) libcrypt.so.1 =\> /lib/tls/i686/cmov/libcrypt.so.1 (0x007b8000) libm.so.6 =\> /lib/tls/i686/cmov/libm.so.6 (0x00d63000) libc.so.6 =\> /lib/tls/i686/cmov/libc.so.6 (0x00394000) /lib/ld-linux.so.2 (0x0067e000) ~/src/ruby\> ./ruby -v ruby 1.8.6 (2008-08-11 patchlevel 287) [i686-linux] (same after make install) Any ideas what broke? I’ve never seen anything like this before, and I’ve been using p287 on several systems for months (at least). This is on ubuntu karmic. Further info: ~/src/ruby\> make check not ok float 1 – ./sample/test.rb:1172 not ok float 2 – ./sample/test.rb:1173 not ok float 3 – ./sample/test.rb:1174 not ok float 4 – ./sample/test.rb:1175 not ok float 5 – ./sample/test.rb:1176 not ok float 6 – ./sample/test.rb:1177 not ok float 7 – ./sample/test.rb:1178 not ok float 8 – ./sample/test.rb:1179 not ok float 9 – ./sample/test.rb:1180 test failed make: \*\*\* [test] Error 1 ---
**Author:** ![Joel\_VanderWerf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e19b73/32.png) [@Joel\_VanderWerf](https://www.ruby-forum.com/u/Joel_VanderWerf)\ **Post date:** [November 28, 2009, 11:15pm UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565/2 "2009-11-28T23:15:26Z")
CC’ing ruby-core@ ---
**Author:** ![Joel\_VanderWerf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e19b73/32.png) [@Joel\_VanderWerf](https://www.ruby-forum.com/u/Joel_VanderWerf)\ **Post date:** [November 29, 2009, 5:40am UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565/3 "2009-11-29T05:40:30Z")
> > ~/src/ruby\> RUBYOPT=’’ ./ruby -e ‘x=0.123; puts x’ > > 123.0 on Ubuntu 8.04.3 LTS I don’t seem to get it. $ ./ruby -ve ‘x=0.123; puts x’ ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-linux] 0.123 If that is any help. -r ---
**Author:** ![Joel\_VanderWerf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e19b73/32.png) [@Joel\_VanderWerf](https://www.ruby-forum.com/u/Joel_VanderWerf)\ **Post date:** [November 29, 2009, 7:52am UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565/4 "2009-11-29T07:52:11Z")
Roger P. wrote: > -r > That’s consistent with my experience through ubuntu 9.04. Also, the > ubuntu-packaged ruby (which is 1.8.7) doesn’t have the problem in 9.10. It appears to be a gcc version issue. With 4.4.1, floats break; with 4.3.4, all is ok. Maybe this is related to the date parsing issue with 4.4.1 (when building the syntax gem). It sounds like gcc 4.4.2 fixes some “serious bugs” in 4.4.1 [1], but the ubuntu packagers are reluctant to upgrade.[2] Fortunately, gcc-4.3 is easy to apt-get. [1] [http://freesoftnews.com/archives/18347](http://freesoftnews.com/archives/18347) [2] [Question #91976 “need gcc-4.4.2 for certain ruby libs” : Questions : gcc-4.4 package : Ubuntu](https://answers.launchpad.net/ubuntu/+source/gcc-4.4/+question/91976) ---
**Author:** ![Joel\_VanderWerf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e19b73/32.png) [@Joel\_VanderWerf](https://www.ruby-forum.com/u/Joel_VanderWerf)\ **Post date:** [December 1, 2009, 5:37pm UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565/5 "2009-12-01T17:37:05Z")
> It sounds like gcc 4.4.2 fixes some “serious bugs” in 4.4.1 [1], but the > ubuntu packagers are reluctant to upgrade.[2] Fortunately, gcc-4.3 is easy > to apt-get. Does 4.4.2 fix these floating point weirdnesses then? -r ---
**Author:** ![Joel\_VanderWerf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e19b73/32.png) [@Joel\_VanderWerf](https://www.ruby-forum.com/u/Joel_VanderWerf)\ **Post date:** [November 29, 2009, 8:04am UTC](https://www.ruby-forum.com/t/something-broke-ruby-floats/179565/6 "2009-11-29T08:04:29Z")
Ryan D. wrote: > CC’ing ruby-core@ Thanks. Brief update: building with gcc-4.3 seems to fix the issue, and `make check` passes, except for one test in SOAP.