Revert "Merge pull request #42 from jmesmon/fix-oom"

This reverts commit 1c3f457cf9, reversing
changes made to 84b5c416ca.

src/reader.rs

@@ -335,15 +335,7 @@ impl<'a, R: Read> Decoder for DecoderReader<'a, R> {
     fn read_seq<T, F>(&mut self, f: F) -> DecodingResult<T>
         where F: FnOnce(&mut DecoderReader<'a, R>, usize) -> DecodingResult<T>
     {
-        use std::mem::size_of;
-        use std::usize;
         let len = try!(self.read_usize());
-        if let SizeLimit::Bounded(x) = self.size_limit {
-            if (len > usize::MAX / size_of::<T>()) ||
-                    (len * size_of::<T>()) as u64 > (x - self.read) {
-                return Err(DecodingError::SizeLimit)
-            }
-        }
         f(self, len)
     }
     fn read_seq_elt<T, F>(&mut self, _: usize, f: F) -> DecodingResult<T>

src/test.rs

@@ -323,21 +323,3 @@ fn test_slicebox() {
 fn test_multi_strings() {
     assert!(encode(&("foo", "bar", "baz"), Infinite).is_ok());
 }
-
-#[test]
-fn no_oom() {
-    use std::io::Cursor;
-
-    #[derive(RustcEncodable)]
-    struct FakeVec {
-        len: u64,
-        byte: u8
-    }
-
-    let x = encode(&FakeVec { len: 0xffffffffffffffffu64, byte: 1 }, Bounded(10)).unwrap();
-    let y : Result<Vec<u8>, _> = decode_from(&mut Cursor::new(&x[..]), Bounded(10));
-    match y {
-        Err(DecodingError::SizeLimit) => assert!(true),
-        _ => assert!(false)
-    }
-}