1 files changed, 32 insertions, 0 deletions
diff --git a/ext/-test-/string/set_len.c b/ext/-test-/string/set_len.c
new file mode 100644
index 0000000000..b55ef6f469
--- /dev/null
+++ b/ext/-test-/string/set_len.c
@@ -0,0 +1,32 @@
+#include "ruby.h"
+
+static VALUE
+bug_str_set_len(VALUE str, VALUE len)
+{
+    rb_str_set_len(str, NUM2LONG(len));
+    return str;
+}
+
+static VALUE
+bug_str_append(VALUE str, VALUE addendum)
+{
+    StringValue(addendum);
+    rb_str_modify_expand(str, RSTRING_LEN(addendum));
+    memcpy(RSTRING_END(str), RSTRING_PTR(addendum), RSTRING_LEN(addendum));
+    return str;
+}
+
+static VALUE
+bug_str_resize(VALUE str, VALUE len)
+{
+    rb_str_resize(str, NUM2LONG(len));
+    return str;
+}
+
+void
+Init_string_set_len(VALUE klass)
+{
+    rb_define_method(klass, "set_len", bug_str_set_len, 1);
+    rb_define_method(klass, "append", bug_str_append, 1);
+    rb_define_method(klass, "resize", bug_str_resize, 1);
+}