Project

General

Profile

Bug #17854

Updated by meta@vmeta.jp (Koichiro Iwao) 3 months ago

## Affected version 
 * Ruby 2.6, 2.7, 3.0 compiled with **clang on FressBD** 

 No tested with other versions. Ruby compiled with GCC doesn't have this issue. 

 ## Snippet to reproduce 
 ``` 
 ruby -e 'case 1; when 2r; 3; end' 
 ``` 

 ## Step to reproduce 

 Prepare a fresh installation of FreeBSD 13. Either Ruby installed from system package or ruby-build can reproduce the issue. 


 ``` 
 # clang -v  
 FreeBSD clang version 11.0.1 (git@github.com:llvm/llvm-project.git llvmorg-11.0.1-0-g43ff75f2c3fe) 
 Target: x86_64-unknown-freebsd13.0 
 Thread model: posix 
 InstalledDir: /usr/bin 
 [root@ruby-bug /tmp]# clang -v  
 FreeBSD clang version 11.0.1 (git@github.com:llvm/llvm-project.git llvmorg-11.0.1-0-g43ff75f2c3fe) 
 Target: x86_64-unknown-freebsd13.0 
 Thread model: posix 
 InstalledDir: /usr/bin 
 ``` 

 ### System Ruby 


 ``` 
 # pkg install ruby  
 # /usr/local/bin/ruby -v 
 # /usr/local/bin/ruby -e 'case 1; when 2r; 3; end' 
 ``` 

 ### Ruby installed by ruby-build 

 Same as Ruby installed by ruby-build. 
 ``` 
 # pkg install rbenv ruby-build 
 # bash 
 bash# eval "$(rbenv init -)" 
 bash# cd /tmp 
 bash# rbenv install 2.7.3 
 bash# rbenv local 2.7.3 
 bash# rbenv which ruby 
 /root/.rbenv/versions/2.7.3/bin/ruby 
 bash# ruby -e 'case 1; when 2r; 3; end' 
 ``` 


 ## Backtrace (submitted by the original reporter) 
 ``` 

 Backtrace (with a debug build): 

 * thread #1, name = 'ruby27', stop reason = signal SIGSEGV 
     frame #0: 0x0000000801add4e8 libruby27.so.27`append_compile_error(iseq=0x000000089445a6b8, line=1125956, fmt="") at compile.c:380:47 
     frame #1: 0x00007fffffffc930 
   * frame #2: 0x0000000801c4d915 libruby27.so.27`rb_st_lookup [inlined] do_hash(key=36847331000, tab=0x000000086f314d40) at st.c:326:33 
     frame #3: 0x0000000801c4d90b libruby27.so.27`rb_st_lookup(tab=0x000000086f314d40, key=36847331000, value=0x00007fffffffc958) at st.c:1104 
     frame #4: 0x0000000801b63443 libruby27.so.27`rb_hash_lookup2 [inlined] hash_stlike_lookup(hash=36847330480, key=<unavailable>, pval=0x00007fffffffc958) at hash.c:0 
     frame #5: 0x0000000801b6339a libruby27.so.27`rb_hash_lookup2(hash=36847330480, key=36847331000, def=8) at hash.c:2070 
     frame #6: 0x0000000801b0640a libruby27.so.27`when_vals(iseq=0x000000089445a550, cond_seq=0x00007fffffffcb60, vals=0x0000000878b93098, l1=<unavailable>, only_special_literals=1, literals=<unavailable>) at compile.c:4322:18 
     frame #7: 0x0000000801afac70 libruby27.so.27`iseq_compile_each0 at compile.c:5334:27 
     frame #8: 0x0000000801afa5c1 libruby27.so.27`iseq_compile_each0(iseq=0x000000089445a550, ret=0x00007fffffffcd60, node=0x0000000878b93108, popped=0) at compile.c:7162 
     frame #9: 0x0000000801b0ab71 libruby27.so.27`setup_args_core [inlined] compile_args(node=0x0000000878b93140) at compile.c:3923:13 
     frame #10: 0x0000000801b0ab59 libruby27.so.27`setup_args_core(iseq=0x000000089445a550, args=0x00007fffffffcd60, argn=<unavailable>, dup_rest=<unavailable>, flag=<unavailable>, keywords=0x00007fffffffcd28) at compile.c:5049 
     frame #11: 0x0000000801af4dbf libruby27.so.27`iseq_compile_each0 [inlined] compile_call(iseq=0x000000089445a550, ret=0x00007fffffffce80, node=0x0000000878b93060, type=<unavailable>, line=1, popped=0) at compile.c:7046:16 
     frame #12: 0x0000000801af4ce1 libruby27.so.27`iseq_compile_each0(iseq=0x000000089445a550, ret=0x00007fffffffce80, node=0x0000000878b93060, popped=0) at compile.c:7670 
     frame #13: 0x0000000801adc735 libruby27.so.27`rb_iseq_compile_node(iseq=0x000000089445a550, node=<unavailable>) at compile.c:702:6 
     frame #14: 0x0000000801b85a47 libruby27.so.27`rb_iseq_new_with_opt(ast=0x000000089445a718, name=<unavailable>, path=<unavailable>, realpath=<unavailable>, first_lineno=1, parent=0x0000000819358010, type=ISEQ_TYPE_MAIN, option=0x0000000801cf1d28) at iseq.c:821:5 
     frame #15: 0x0000000801b85b6d libruby27.so.27`rb_iseq_new_main(ast=<unavailable>, path=<unavailable>, realpath=<unavailable>, parent=<unavailable>) at iseq.c:787:12 
     frame #16: 0x0000000801c40537 libruby27.so.27`ruby_process_options at ruby.c:1904:9 
     frame #17: 0x0000000801c3f433 libruby27.so.27`ruby_process_options(argc=<unavailable>, argv=<unavailable>) at ruby.c:2413 
     frame #18: 0x0000000801b3f513 libruby27.so.27`ruby_options(argc=<unavailable>, argv=<unavailable>) at eval.c:124:2 
     frame #19: 0x0000000000201cca ruby27`main(argc=<unavailable>, argv=<unavailable>) at main.c:50:23 
     frame #20: 0x0000000000201a70 ruby27`_start(ap=<unavailable>, cleanup=<unavailable>) at crt1.c:76:7 
 ``` 

 ## Patch 

 The following patch is provided by the original reporter but it looks too ad-hoc. If this bug is fixed in Ruby upstream, I'll apply it to FreeBSD package. 

 ```diff 
 diff --git a/compile.c b/compile.c 
 index 1cabb8c..a954176 100644 
 --- a/compile.c 
 +++ b/compile.c 
 @@ -1987,7 +1987,7 @@ cdhash_cmp(VALUE val, VALUE lit) 
          return rb_float_cmp(lit, val); 
      } 
      else { 
 -          UNREACHABLE_RETURN(-1); 
 +          return -1; 
      } 
  } 
 
 @@ -2005,7 +2005,7 @@ cdhash_hash(VALUE a) 
        case T_FLOAT: 
          return rb_dbl_long_hash(RFLOAT_VALUE(a)); 
        default: 
 -          UNREACHABLE_RETURN(0); 
 +          return 0; 
      } 
  } 
 ``` 

 ## See also 
 Downstream bug: 
 * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255583

Back