Bug #11419
Updated by matsuda (Akira Matsuda) over 8 years ago
This code segfaults on 2.3 trunk (does not segfault on 2.2 stable):
~~~
% ruby -e 'Object.instance_method(:tap).super_method'
-e:1: [BUG] Segmentation fault at 0x00000000000010
ruby 2.3.0dev (2015-08-06 trunk 51500) [x86_64-darwin14]
-- Crash Report log information --------------------------------------------
See Crash Report log file under the one of following:
* ~/Library/Logs/CrashReporter
* /Library/Logs/CrashReporter
* ~/Library/Logs/DiagnosticReports
* /Library/Logs/DiagnosticReports
for more details.
Don't forget to include the above Crash Report log file in bug reports.
-- Control frame information -----------------------------------------------
c:0003 p:---- s:0007 e:000006 CFUNC :super_method
c:0002 p:0015 s:0004 E:001a30 EVAL -e:1 [FINISH]
c:0001 p:0000 s:0002 E:001a10 (none) [FINISH]
-- Ruby level backtrace information ----------------------------------------
-e:1:in `<main>'
-e:1:in `super_method'
-- Machine register context ------------------------------------------------
rax: 0x00007ff61b0e05d8 rbx: 0x00007ff61afddb40 rcx: 0x0000000000000000
rdx: 0x0000000000000000 rdi: 0x00007ff61c0aea28 rsi: 0x0000000101d95e18
rbp: 0x00007fff5e094100 rsp: 0x00007fff5e0940d0 r8: 0x00007ff61ac094c8
r9: 0x0000000000000dda r10: 0x0000000000000001 r11: 0x000000000000000d
r12: 0x00007ff61c0aea28 r13: 0x0000000101f8ff80 r14: 0x00007ff61c0aea28
r15: 0x00007ff61ac09120 rip: 0x0000000101bc0148 rfl: 0x0000000000010206
-- C level backtrace information -------------------------------------------
0 ruby 0x0000000101d06474 rb_vm_bugreport + 388
1 ruby 0x0000000101baf0a9 rb_bug_context + 473
2 ruby 0x0000000101c7faa3 sigsegv + 83
3 libsystem_platform.dylib 0x00007fff965cff1a _sigtramp + 26
4 ruby 0x0000000101bc0148 method_super_method + 40
5 ??? 0x0000000000000000 0x0 + 0
-- Other runtime information -----------------------------------------------
* Loaded script: -e
* Loaded features:
0 enumerator.so
1 rational.so
2 complex.so
3 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/x86_64-darwin14/enc/encdb.bundle
4 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/x86_64-darwin14/enc/trans/transdb.bundle
5 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/unicode_normalize.rb
6 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/x86_64-darwin14/rbconfig.rb
7 thread.rb
8 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/x86_64-darwin14/thread.bundle
9 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/compatibility.rb
10 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/defaults.rb
11 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/deprecate.rb
12 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/errors.rb
13 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/version.rb
14 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/requirement.rb
15 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/platform.rb
16 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/basic_specification.rb
17 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/stub_specification.rb
18 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/util/list.rb
19 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/x86_64-darwin14/stringio.bundle
20 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/specification.rb
21 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/exceptions.rb
22 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/core_ext/kernel_gem.rb
23 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/monitor.rb
24 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb
25 /Users/a_matsuda/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/rubygems.rb
~~~
Not only :tap but other instance methods defined on Object such as :object_id, :clone also segfaults in the same way.
OTOH, these **do not** segfault.
~~~
% ruby -e 'Object.new.method(:tap).super_method'
% ruby -e 'Object.instance_method(:==).super_method'
% ruby -e 'String.instance_method(:reverse).super_method'
% ruby -e 'Class.new { def foo() end }.instance_method(:foo).super_method'
~~~