1 files changed, 32 insertions, 1 deletions
diff --git a/src/components/script/dom/bindings/error.rs b/src/components/script/dom/bindings/error.rs
index aa4c84cd981..bbfad388e4f 100644
--- a/src/components/script/dom/bindings/error.rs
+++ b/src/components/script/dom/bindings/error.rs
@@ -4,9 +4,12 @@
 
 use js::jsapi::{JSContext, JSBool};
 use js::jsapi::{JS_IsExceptionPending};
-
+use js::jsapi::{JS_ReportErrorNumber, JSErrorFormatString, struct_JSErrorFormatString, JSEXN_TYPEERR};
 use js::glue::{ReportError};
 
+use libc;
+use std::ptr;
+
 #[deriving(Show)]
 pub enum Error {
     IndexSize,
@@ -44,3 +47,31 @@ pub fn throw_not_in_union(cx: *JSContext, names: &'static str) -> JSBool {
     });
     return 0;
 }
+
+static ERROR_FORMAT_STRING_STRING: [libc::c_char, ..4] = [
+    '{' as libc::c_char,
+    '0' as libc::c_char,
+    '}' as libc::c_char,
+    0 as libc::c_char,
+];
+
+static ERROR_FORMAT_STRING: JSErrorFormatString = struct_JSErrorFormatString {
+    format: &ERROR_FORMAT_STRING_STRING as *libc::c_char,
+    argCount: 1,
+    exnType: JSEXN_TYPEERR as i16,
+};
+
+extern fn get_error_message(_user_ref: *mut libc::c_void,
+                            _locale: *libc::c_char,
+                            error_number: libc::c_uint) -> *JSErrorFormatString
+{
+    assert_eq!(error_number, 0);
+    &ERROR_FORMAT_STRING as *JSErrorFormatString
+}
+
+pub fn throw_type_error(cx: *JSContext, error: &str) {
+    let error = error.to_c_str();
+    error.with_ref(|error| unsafe {
+        JS_ReportErrorNumber(cx, get_error_message, ptr::null(), 0, error);
+    });
+}