* string.c (rb_str_set_len): should fail to modify shared string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28865 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 39 insertions, 0 deletions

diff --git a/ext/-test-/string/extconf.rb b/ext/-test-/string/extconf.rb
new file mode 100644
index 0000000000..42c10b994b
--- /dev/null
+++ b/ext/-test-/string/extconf.rb
@@ -0,0 +1,6 @@
+$srcs = Dir[File.join($srcdir, "*.{#{SRC_EXT.join(%q{,})}}")]
+inits = $srcs.map {|s| File.basename(s, ".*")}
+inits.delete("init")
+inits.map! {|s|"X(#{s})"}
+$defs << "-DTEST_INIT_FUNCS(X)=\"#{inits.join(' ')}\""
+create_makefile("-test-/string/string")
diff --git a/ext/-test-/string/init.c b/ext/-test-/string/init.c
new file mode 100644
index 0000000000..793181d148
--- /dev/null
+++ b/ext/-test-/string/init.c
@@ -0,0 +1,19 @@
+#include "ruby.h"
+
+#define init(n) {void Init_##n(VALUE klass); Init_##n(klass);}
+
+VALUE
+bug_str_modify(VALUE str)
+{
+    rb_str_modify(str);
+    return str;
+}
+
+void
+Init_string(void)
+{
+    VALUE mBug = rb_define_module("Bug");
+    VALUE klass = rb_define_class_under(mBug, "String", rb_cString);
+    rb_define_method(klass, "modify!", bug_str_modify, 0);
+    TEST_INIT_FUNCS(init);
+}
diff --git a/ext/-test-/string/set_len.c b/ext/-test-/string/set_len.c
new file mode 100644
index 0000000000..3c7d19d778
--- /dev/null
+++ b/ext/-test-/string/set_len.c
@@ -0,0 +1,14 @@
+#include "ruby.h"
+
+static VALUE
+bug_str_set_len(VALUE str, VALUE len)
+{
+    rb_str_set_len(str, NUM2LONG(len));
+    return str;
+}
+
+void
+Init_set_len(VALUE klass)
+{
+    rb_define_method(klass, "set_len", bug_str_set_len, 1);
+}