From: Soutaro Matsumoto <matsumoto@...>
Date: 2009-01-29T16:33:44+09:00
Subject: [ruby-core:21657] [BUG:1.9] crash on variable reference in BEGIN inside class

Hi,

ruby 1.9 crashes on variable reference in BEGIN block inside class or
block like the following.


  class C
    x = 10
    BEGIN { puts x }
  end

  lambda {
    x = 10
    BEGIN { puts x }
  }


Prohibiting BEGIN in non-toplevel scope seems good for me.


$ rubysvn --version
ruby 1.9.1p5000 (2009-01-29 trunk 21874) [i386-darwin9.6.0]

$ rubysvn
class C
  x = 10
  BEGIN { puts x }
end

rubysvn: [BUG] get_local_var_idx: -1
ruby 1.9.1p5000 (2009-01-29 trunk 21874) [i386-darwin9.6.0]

-- control frame ----------
c:0002 p:-587732 s:0004 b:0004 l:000003 d:000003 TOP
c:0001 p:0000 s:0002 b:0002 l:000004 d:000004 TOP    <main>:54964
---------------------------
-- Ruby level backtrace information-----------------------------------------

-- C level backtrace information -------------------------------------------
0x119612 0   rubysvn                             0x00119612
rb_vm_bugreport + 82
0x2cf6c 1   rubysvn                             0x0002cf6c rb_warning + 444
0x2cfcb 2   rubysvn                             0x0002cfcb rb_bug + 43
0xf3461 3   rubysvn                             0x000f3461
rb_iseq_translate_threaded_code + 1345
0xf5a5c 4   rubysvn                             0x000f5a5c
rb_parse_in_main + 3692
0xfdcf9 5   rubysvn                             0x000fdcf9
rb_iseq_compile_node + 3193
0xfde1a 6   rubysvn                             0x000fde1a
rb_iseq_compile_node + 3482
0xfee68 7   rubysvn                             0x000fee68
rb_iseq_compile_node + 7656
0xf6b67 8   rubysvn                             0x000f6b67
rb_parse_in_main + 8055
0xf84b3 9   rubysvn                             0x000f84b3
rb_parse_in_main + 14531
0xfd4fc 10  rubysvn                             0x000fd4fc
rb_iseq_compile_node + 1148
0x100dbb 11  rubysvn                             0x00100dbb
ruby_debug_breakpoint + 3579
0x100e71 12  rubysvn                             0x00100e71
rb_iseq_new_main + 97
0xbe7e6 13  rubysvn                             0x000be7e6 ruby_set_argv
+ 2326
0x108dff 14  rubysvn                             0x00108dff
rb_vm_call_cfunc + 175
0xbea9d 15  rubysvn                             0x000bea9d
ruby_process_options + 157
0x3210b 16  rubysvn                             0x0003210b ruby_options
+ 123
0x2147 17  rubysvn                             0x00002147 main + 87
0x20b6 18  rubysvn                             0x000020b6 start + 54

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


-- 
Soutaro Matsumoto