[ruby-dev:32957] SEGV by Symbol#match

岩月と申します。

Ruby 1.9でSymbol#matchを使うとSEGVが発生しました。

% gdb --args ruby -ve ":a.match(/a/)"
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This GDB was configured as "i386-marcel-freebsd"...
(gdb) run
Starting program: /usr/home/don/ruby/ruby-1.9/_build_/ruby -ve :a.match\(/a/\)
[New LWP 100100]
[New Thread 0x8157000 (LWP 100100)]
[New Thread 0x8157300 (LWP 100112)]
ruby 1.9.0 (2008-01-07 revision 0) [i386-freebsd6.3]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x8157000 (LWP 100100)]
str_new3 (klass=136203720, str=0) at ../string.c:279
279         if (RSTRING_LEN(str) <= RSTRING_EMBED_LEN_MAX) {
(gdb) bt
#0  str_new3 (klass=136203720, str=0) at ../string.c:279
#1  0x080c3dbe in sym_match (sym=1, other=135651356) at ../string.c:5727
#2  0x080dc168 in vm_call_method (th=0x815a000, cfp=0x81ddf58, num=1,
blockptr=0x1, flag=97, id=1888, mn=0x80c3db0,
    recv=2355214, klass=1888) at vm_insnhelper.c:279
#3  0x080d6e79 in vm_eval (th=0x815a000, initial=0) at insns.def:1049
#4  0x080db2fe in vm_eval_body (th=0x815a000) at ../vm.c:1147
#5  0x080dcb7f in rb_iseq_eval (iseqval=136203840) at ../vm.c:1356
#6  0x08058acb in ruby_exec_node (n=0x81e4ecc, file=0x8249de1 "-e") at
../eval.c:228
#7  0x0805b784 in ruby_run_node (n=0x81e4ecc) at ../eval.c:258
#8  0x080580b2 in main (argc=3, argv=0xbfbfe79c, envp=0xbfbfe7ac) at
../main.c:35


以下のように修正すると正常に動作しました。

Index: string.c
===================================================================
--- string.c	(revision 14932)
+++ string.c	(working copy)
@@ -5975,7 +5975,7 @@
     rb_define_method(rb_cSymbol, "length", sym_length, 0);
     rb_define_method(rb_cSymbol, "size", sym_length, 0);
     rb_define_method(rb_cSymbol, "empty?", sym_empty, 0);
-    rb_define_method(rb_cSymbol, "match", sym_match, -1);
+    rb_define_method(rb_cSymbol, "match", sym_match, 1);

     rb_define_method(rb_cSymbol, "upcase", sym_upcase, 0);
     rb_define_method(rb_cSymbol, "downcase", sym_downcase, 0);



-- 
IWATSUKI Hiroyuki <URL:mailto:[e-mail]>