Ruby 1.9.3p327(2012-11-10revision37606)
ext/-test-/string/cstr.c
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00001 #include "ruby.h"
00002 
00003 static VALUE
00004 bug_str_cstr_term(VALUE str)
00005 {
00006     long len;
00007     char *s;
00008     rb_str_modify(str);
00009     len = RSTRING_LEN(str);
00010     RSTRING_PTR(str)[len] = 'x';
00011     s = StringValueCStr(str);
00012     rb_gc();
00013     return INT2NUM(s[len]);
00014 }
00015 
00016 void
00017 Init_cstr(VALUE klass)
00018 {
00019     rb_define_method(klass, "cstr_term", bug_str_cstr_term, 0);
00020 }
00021