Bug #8634: Segfault with sprintf of force_encoding('UTF-16LE') on Windows

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: 2.1.0
• ruby -v: ruby 2.1.0dev (2013-07-14 trunk 41961) [i386-mingw32]
• Backport: 1.9.3: DONTNEED, 2.0.0: DONTNEED

[phasis68 (Heesob Park)]

The revision r41937 raised segfault in test_m17n.rb

http://ci.rubyinstaller.org/job/ruby-trunk-x64-test-all/1590/console

Here is a simplified test case.

C:\work>ruby -e 'p("%s".force_encoding("UTF-16LE")%"test")'
-e:1: [BUG] Segmentation fault
ruby 2.1.0dev (2013-07-14 trunk 41961) [i386-mingw32]

-- Control frame information -----------------------------------------------
c:0003 p:---- s:0008 e:000007 CFUNC :p
c:0002 p:0015 s:0004 E:0007e4 EVAL -e:1 [FINISH]
c:0001 p:0000 s:0002 E:0022b4 TOP [FINISH]

-e:1:in <main>' -e:1:in p'

-- C level backtrace information -------------------------------------------
C:\Windows\SysWOW64\ntdll.dll(ZwWaitForSingleObject+0x15) [0x7701F8B1]
C:\Windows\syswow64\kernel32.dll(WaitForSingleObjectEx+0x43) [0x75151194]
C:\Windows\syswow64\kernel32.dll(WaitForSingleObject+0x12) [0x75151148]
c:\usr\local\bin\msvcrt-ruby210.dll(rb_vm_bugreport+0xa7) [0x6D3811B7]
c:\usr\local\bin\msvcrt-ruby210.dll(rb_name_err_mesg_new+0x69d) [0x6D2435AD]
c:\usr\local\bin\msvcrt-ruby210.dll(rb_bug+0x2e) [0x6D2443AE]
c:\usr\local\bin\msvcrt-ruby210.dll(rb_check_safe_str+0x110) [0x6D305760]
[0x00401866]
C:\Windows\SysWOW64\ntdll.dll(RtlKnownExceptionFilter+0xb7) [0x770774DF]

-- Other runtime information -----------------------------------------------

• Loaded script: -e

• Loaded features:

  0 enumerator.so
  1 c:/usr/local/lib/ruby/2.1.0/i386-mingw32/enc/encdb.so
  2 c:/usr/local/lib/ruby/2.1.0/i386-mingw32/enc/cp949.so
  3 c:/usr/local/lib/ruby/2.1.0/i386-mingw32/enc/trans/transdb.so
  4 c:/usr/local/lib/ruby/2.1.0/i386-mingw32/rbconfig.rb
  5 c:/usr/local/lib/ruby/2.1.0/rubygems/compatibility.rb
  6 c:/usr/local/lib/ruby/2.1.0/rubygems/defaults.rb
  7 c:/usr/local/lib/ruby/2.1.0/rubygems/deprecate.rb
  8 c:/usr/local/lib/ruby/2.1.0/rubygems/errors.rb
  9 c:/usr/local/lib/ruby/2.1.0/rubygems/version.rb
  10 c:/usr/local/lib/ruby/2.1.0/rubygems/requirement.rb
  11 c:/usr/local/lib/ruby/2.1.0/rubygems/platform.rb
  12 c:/usr/local/lib/ruby/2.1.0/rubygems/basic_specification.rb
  13 c:/usr/local/lib/ruby/2.1.0/rubygems/stub_specification.rb
  14 c:/usr/local/lib/ruby/2.1.0/rubygems/specification.rb
  15 c:/usr/local/lib/ruby/2.1.0/rubygems/exceptions.rb
  16 c:/usr/local/lib/ruby/2.1.0/i386-mingw32/enc/utf_16le.so
  17 c:/usr/local/lib/ruby/2.1.0/i386-mingw32/enc/trans/utf_16_32.so
  18 c:/usr/local/lib/ruby/2.1.0/rubygems/core_ext/kernel_gem.rb
  19 c:/usr/local/lib/ruby/2.1.0/thread.rb
  20 c:/usr/local/lib/ruby/2.1.0/monitor.rb
  21 c:/usr/local/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb
  22 c:/usr/local/lib/ruby/2.1.0/rubygems.rb

[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

This application has requested the Runtime to terminate it in an unusual way.

[nobu (Nobuyoshi Nakada)]

• Category set to core
• Status changed from Open to Assigned
• Assignee set to nobu (Nobuyoshi Nakada)
• Priority changed from Normal to 5
• Target version set to 2.1.0
• Backport changed from 1.9.3: UNKNOWN, 2.0.0: UNKNOWN to 1.9.3: DONTNEED, 2.0.0: DONTNEED

fixing.

[nobu (Nobuyoshi Nakada)]

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

This issue was solved with changeset r41967.
Heesob, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

string.c: consider old terminator

• string.c (str_fill_term): consider old terminator length, and should
  not use rb_enc_ascget since it depends on the current encoding which
  may not be compatible with the new terminator. [Bug #8634]