mhenry@samsara:~/tmp/ruby-1.9.1-p129> ./configure --prefix=$HOME/ruby
.
.
.

./miniruby -I./lib -I.ext/common -I./- -r./ext/purelib.rb  ./enc/make_encmake.rb --builtin-encs="ascii.o us_ascii.o unicode.o utf_8.o" --builtin-transes="newline.o" enc.mk
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:177: [BUG] Stack consistency error (sp: 110, bp: 108)
ruby 1.9.1p129 (2009-05-12 revision 23412) [i686-linux]

-- control frame ----------
c:0025 p:0178 s:0110 b:0108 l:000094 d:000107 BLOCK  /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:177
c:0024 p:---- s:0101 b:0101 l:000100 d:000100 FINISH
c:0023 p:---- s:0099 b:0099 l:000098 d:000098 CFUNC  :gsub!
c:0022 p:0023 s:0095 b:0095 l:000094 d:000094 METHOD /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173
c:0021 p:0110 s:0090 b:0088 l:000074 d:000087 BLOCK  /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:180
c:0020 p:---- s:0081 b:0081 l:000080 d:000080 FINISH
c:0019 p:---- s:0079 b:0079 l:000078 d:000078 CFUNC  :gsub!
c:0018 p:0023 s:0075 b:0075 l:000074 d:000074 METHOD /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173
c:0017 p:0110 s:0070 b:0068 l:000054 d:000067 BLOCK  /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:180
c:0016 p:---- s:0061 b:0061 l:000060 d:000060 FINISH
c:0015 p:---- s:0059 b:0059 l:000058 d:000058 CFUNC  :gsub!
c:0014 p:0023 s:0055 b:0055 l:000054 d:000054 METHOD /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173
c:0013 p:0018 s:0050 b:0050 l:000041 d:000049 BLOCK  /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:191
c:0012 p:---- s:0047 b:0047 l:000046 d:000046 FINISH
c:0011 p:---- s:0045 b:0045 l:000044 d:000044 CFUNC  :each_value
c:0010 p:3351 s:0042 b:0042 l:000041 d:000041 CLASS  /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:190
c:0009 p:0009 s:0040 b:0040 l:000039 d:000039 TOP    /home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:5
c:0008 p:---- s:0038 b:0038 l:000037 d:000037 FINISH
c:0007 p:---- s:0036 b:0036 l:000035 d:000035 CFUNC  :require
c:0006 p:0011 s:0032 b:0032 l:000031 d:000031 TOP    /home/mhenry/tmp/ruby-1.9.1-p129/lib/mkmf.rb:4
c:0005 p:---- s:0018 b:0018 l:000017 d:000017 FINISH
c:0004 p:---- s:0016 b:0016 l:000015 d:000015 CFUNC  :load
c:0003 p:0104 s:0012 b:0012 l:000e7c d:001dd4 EVAL   ./enc/make_encmake.rb:8
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:000e7c d:000e7c TOP    <main>:17
---------------------------
-- Ruby level backtrace information-----------------------------------------
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:177:in `block in expand'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173:in `gsub!'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173:in `expand'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:180:in `block in expand'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173:in `gsub!'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173:in `expand'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:180:in `block in expand'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173:in `gsub!'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:173:in `expand'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:191:in `block in <module:RbConfig>'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:190:in `each_value'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:190:in `<module:RbConfig>'
/home/mhenry/tmp/ruby-1.9.1-p129/rbconfig.rb:5:in `<top (required)>'
/home/mhenry/tmp/ruby-1.9.1-p129/lib/mkmf.rb:4:in `require'
/home/mhenry/tmp/ruby-1.9.1-p129/lib/mkmf.rb:4:in `<top (required)>'
./enc/make_encmake.rb:8:in `load'
./enc/make_encmake.rb:8:in `<main>'

-- C level backtrace information -------------------------------------------
0x815cdb8 ./miniruby(rb_vm_bugreport+0x48) [0x815cdb8]
0x8083d6e ./miniruby [0x8083d6e]
0x8083de8 ./miniruby(rb_bug+0x28) [0x8083de8]
0x8152a0c ./miniruby [0x8152a0c]
0x8153074 ./miniruby [0x8153074]
0x8159829 ./miniruby(rb_yield+0x299) [0x8159829]
0x811dd18 ./miniruby [0x811dd18]
0x814aa6d ./miniruby [0x814aa6d]
0x8157efe ./miniruby [0x8157efe]
0x814f34f ./miniruby [0x814f34f]
0x8153074 ./miniruby [0x8153074]
0x8159829 ./miniruby(rb_yield+0x299) [0x8159829]
0x811dd18 ./miniruby [0x811dd18]
0x814aa6d ./miniruby [0x814aa6d]
0x8157efe ./miniruby [0x8157efe]
0x814f34f ./miniruby [0x814f34f]
0x8153074 ./miniruby [0x8153074]
0x8159829 ./miniruby(rb_yield+0x299) [0x8159829]
0x811dd18 ./miniruby [0x811dd18]
0x814aa6d ./miniruby [0x814aa6d]
0x8157efe ./miniruby [0x8157efe]
0x814f34f ./miniruby [0x814f34f]
0x8153074 ./miniruby [0x8153074]
0x8159829 ./miniruby(rb_yield+0x299) [0x8159829]
0x8097497 ./miniruby [0x8097497]
0x8097ca2 ./miniruby [0x8097ca2]
0x810c7c1 ./miniruby(st_foreach+0xa1) [0x810c7c1]
0x80999d2 ./miniruby [0x80999d2]
0x8085081 ./miniruby(rb_ensure+0x81) [0x8085081]
0x8098dd2 ./miniruby(rb_hash_foreach+0x42) [0x8098dd2]
0x80992db ./miniruby [0x80992db]
0x8157efe ./miniruby [0x8157efe]
0x814f34f ./miniruby [0x814f34f]
0x8153074 ./miniruby [0x8153074]
0x81532ea ./miniruby(rb_iseq_eval+0xfa) [0x81532ea]
0x8087847 ./miniruby(rb_load+0x167) [0x8087847]
0x80884cb ./miniruby(rb_require_safe+0x55b) [0x80884cb]
0x8157efe ./miniruby [0x8157efe]
0x814f34f ./miniruby [0x814f34f]
0x8153074 ./miniruby [0x8153074]
0x81532ea ./miniruby(rb_iseq_eval+0xfa) [0x81532ea]
0x8087847 ./miniruby(rb_load+0x167) [0x8087847]
0x8087979 ./miniruby [0x8087979]
0x814aa6d ./miniruby [0x814aa6d]
0x8157efe ./miniruby [0x8157efe]
0x814f34f ./miniruby [0x814f34f]
0x8153074 ./miniruby [0x8153074]
0x81531c4 ./miniruby(rb_iseq_eval_main+0x94) [0x81531c4]
0x8085bcf ./miniruby(ruby_exec_node+0x9f) [0x8085bcf]
0x8086fb6 ./miniruby(ruby_run_node+0x46) [0x8086fb6]
0x805c270 ./miniruby(main+0x60) [0x805c270]
0x400d95f5 /lib/libc.so.6(__libc_start_main+0xe5) [0x400d95f5]
0x805c171 ./miniruby [0x805c171]

[NOTE]
You may encounter a bug of Ruby interpreter. Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

make: *** [enc.mk] Aborted