Bug #13084
closedString cast to Rational on 2.4.0p0 results in SegFault with Mathn required
Description
See the below example, while mathn
is required recasting a string into a Rational causes a SegFault. Remove mathn and the code will not crash.
require 'mathn'
# Both result in Segfault
Rational("5/5")
"5/5".to_r
segfault_test.rb:5: [BUG] Segmentation fault at 0x0000000000001b
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]
-- 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:0010 e:000009 CFUNC :to_r
c:0002 p:0016 s:0006 e:000005 EVAL segfault_test.rb:5 [FINISH]
c:0001 p:0000 s:0003 E:0022d0 (none) [FINISH]
-- Ruby level backtrace information ----------------------------------------
segfault_test.rb:5:in <main>' segfault_test.rb:5:in
to_r'
-- Machine register context ------------------------------------------------
rax: 0x0000000000000000 rbx: 0x000000000000000b rcx: 0xaf82f5dc522c0078
rdx: 0x00007fff5106bcc1 rdi: 0x000000000000000b rsi: 0x000000000000000b
rbp: 0x00007fff5106bd10 rsp: 0x00007fff5106bcf0 r8: 0x00007fff5106bc4c
r9: 0x000000000000000a r10: 0x0000000000000005 r11: 0x000000000000000a
r12: 0x0000000000004000 r13: 0x000000000000003f r14: 0x000000000000000b
r15: 0x00007fff5106bd98 rip: 0x000000010ec9f90a rfl: 0x0000000000010246
-- C level backtrace information -------------------------------------------
0 ruby 0x000000010ed5efe4 rb_vm_bugreport + 388
1 ruby 0x000000010ebf93da rb_bug_context + 490
2 ruby 0x000000010ecdaf48 sigsegv + 72
3 libsystem_platform.dylib 0x00007fffba3b2bba _sigtramp + 26
4 ruby 0x000000010ec9f90a nurat_div + 266
5 ruby 0x000000010ec9eb71 parse_rat + 593
6 ruby 0x000000010eca1a91 string_to_r + 145
7 ruby 0x000000010ed5246e vm_call_cfunc + 302
8 ruby 0x000000010ed3c78c vm_exec_core + 11932
9 ruby 0x000000010ed4cfc4 vm_exec + 116
10 ruby 0x000000010ec02028 ruby_exec_internal + 136
11 ruby 0x000000010ec01f46 ruby_run_node + 54
12 ruby 0x000000010eb935cf main + 79
-- Other runtime information -----------------------------------------------
-
Loaded script: segfault_test.rb
-
Loaded features:
0 enumerator.so
1 thread.rb
2 rational.so
3 complex.so
4 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/x86_64-darwin16/enc/encdb.bundle
5 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/x86_64-darwin16/enc/trans/transdb.bundle
6 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/unicode_normalize.rb
7 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/x86_64-darwin16/rbconfig.rb
8 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/compatibility.rb
9 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/defaults.rb
10 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/deprecate.rb
11 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/errors.rb
12 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/version.rb
13 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/requirement.rb
14 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/platform.rb
15 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/basic_specification.rb
16 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/stub_specification.rb
17 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/util/list.rb
18 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/x86_64-darwin16/stringio.bundle
19 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/specification.rb
20 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/exceptions.rb
21 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/dependency.rb
22 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/core_ext/kernel_gem.rb
23 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb
24 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb
25 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems.rb
26 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/path_support.rb
27 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/version.rb
28 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/core_ext/name_error.rb
29 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/levenshtein.rb
30 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/jaro_winkler.rb
31 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checker.rb
32 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb
33 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
34 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
35 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/name_error_checkers.rb
36 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/method_name_checker.rb
37 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/null_checker.rb
38 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/formatter.rb
39 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean.rb
40 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/cmath.rb
41 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/e2mmap.rb
42 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/matrix.rb
43 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/singleton.rb
44 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable/impl.rb
45 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable.rb
46 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/prime.rb
47 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/x86_64-darwin16/mathn/rational.bundle
48 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/x86_64-darwin16/mathn/complex.bundle
49 /Users/rposborne/.rbenv/versions/2.4.0/lib/ruby/2.4.0/mathn.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
[1] 1319 abort ruby segfault_test.rb