Backport #4082: Segfault with tailcall_optimization and class definition

• Status: Closed
• Assignee: yugui (Yuki Sonoda)

[judofyr (Magnus Holm)]

=begin
Code:

 RubyVM::InstructionSequence.compile_option = {
   :tailcall_optimization => true,
   :trace_instruction => false
 }

 RubyVM::InstructionSequence.new(<<-EOF).eval
   class Foo
     def fact_helper(n, res)
       if n == 1
         res
       else
         fact_helper(n - 1, n * res)
       end
     end
     
     def fact(n)
       fact_helper(n, 1)
     end
   end
 EOF

 p Foo.new.fact(30000)

Error:

 <compiled>:6: [BUG] Segmentation fault
 ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]

 -- control frame ----------
 c:0004 p:0031 s:0014 b:0011 l:000010 d:000010 METHOD <compiled>:6
 c:0003 p:0078 s:0007 b:0006 l:001588 d:001e68 EVAL   -:22
 c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
 c:0001 p:0000 s:0002 b:0002 l:001588 d:001588 TOP   
 ---------------------------
 -- Ruby level backtrace information ----------------------------------------
 -:22:in `<main>'
 <compiled>:6:in `fact_helper'

 -- C level backtrace information -------------------------------------------

 [NOTE]
 You may have encountered a bug in the Ruby interpreter or extension libraries.
 Bug reports are welcome.
 For details: http://www.ruby-lang.org/bugreport.html

 Abort trap

=end

[naruse (Yui NARUSE)]

• Status changed from Open to Assigned
• Assignee set to ko1 (Koichi Sasada)
• Priority changed from Normal to 3

=begin

=end

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

=begin
This issue was solved with changeset r29885.
Magnus, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end

[nobu (Nobuyoshi Nakada)]

• Category set to core
• Status changed from Closed to Assigned
• Assignee changed from ko1 (Koichi Sasada) to yugui (Yuki Sonoda)
• Priority changed from 3 to Normal

=begin

=end

[yugui (Yuki Sonoda)]

• Status changed from Assigned to Closed

=begin
This issue was solved with changeset r30265.
Magnus, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end