From: ts <decoux@...>
Date: 2001-12-16T22:12:28+09:00
Subject: [ruby-talk:28673] Re: Matrix#inverse broken?

>>>>> "J" == Joel VanderWerf <vjoel@PATH.Berkeley.EDU> writes:

J> m * (m.inv)

 This is unrelated but

pigeon% ./ruby -ve 'require "matrix"; Matrix[[2,2],[2,2]].inv'
ruby 1.7.2 (2001-12-13) [i686-linux]
/home/ts/local/r17/lib/ruby/1.7/matrix.rb:515:in `inverse_from'/home/ts/local/r17/lib
/ruby/1.7/e2mmap.rb:167: [BUG] Segmentation fault
ruby 1.7.2 (2001-12-13) [i686-linux]
Aborted
pigeon% 

pigeon% diff -u variable.c.old variable.c
--- variable.c.old      Sun Dec 16 14:00:19 2001
+++ variable.c  Sun Dec 16 14:02:04 2001
@@ -129,6 +129,9 @@
        st_foreach(rb_class_tbl, fc_i, &arg);
     }
     if (arg.path) {
+       if (!ROBJECT(klass)->iv_tbl) {
+           ROBJECT(klass)->iv_tbl = st_init_numtable();
+       } 
        st_insert(ROBJECT(klass)->iv_tbl,rb_intern("__classpath__"),arg.path);
        return arg.path;
     }
pigeon%

pigeon% ./ruby -ve 'require "matrix"; Matrix[[2,2],[2,2]].inv'
ruby 1.7.2 (2001-12-13) [i686-linux]
/home/ts/local/r17/lib/ruby/1.7/matrix.rb:515:in `inverse_from': Not Regular Matrix (
ExceptionForMatrix::ErrNotRegular)
        from /home/ts/local/r17/lib/ruby/1.7/matrix.rb:511:in `each'
        from /home/ts/local/r17/lib/ruby/1.7/matrix.rb:511:in `inverse_from'
        from /home/ts/local/r17/lib/ruby/1.7/matrix.rb:503:in `inverse'
        from -e:1
pigeon% 



Guy Decoux