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* string.c (rb_string_value_cstr): rb_str_modify can change

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RSTRING_PTR.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30648 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2011-01-24 22:00:55 +00:00
parent 68823fdea5
commit 7a6113d6b6
4 changed files with 47 additions and 1 deletions
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20
ext/-test-/string/cstr.c Normal file
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@ -0,0 +1,20 @@
#include "ruby.h"
static VALUE
bug_str_cstr_term(VALUE str)
{
long len;
char *s;
rb_str_modify(str);
len = RSTRING_LEN(str);
RSTRING_PTR(str)[len] = 'x';
s = StringValueCStr(str);
rb_gc();
return INT2NUM(s[len]);
}
void
Init_cstr(VALUE klass)
{
rb_define_method(klass, "cstr_term", bug_str_cstr_term, 0);
}