1 files changed, 10 insertions, 0 deletions
diff --git a/library/std/src/io/tests.rs b/library/std/src/io/tests.rs
index 5396f7f6e21..c306de3039f 100644
--- a/library/std/src/io/tests.rs
+++ b/library/std/src/io/tests.rs
@@ -692,3 +692,13 @@ fn read_buf_full_read() {
 
     assert_eq!(BufReader::new(FullRead).fill_buf().unwrap().len(), DEFAULT_BUF_SIZE);
 }
+
+#[test]
+// 64-bit only to be sure the allocator will fail fast on an impossible to satsify size
+#[cfg(target_pointer_width = "64")]
+fn try_oom_error() {
+    let mut v = Vec::<u8>::new();
+    let reserve_err = v.try_reserve(isize::MAX as usize - 1).unwrap_err();
+    let io_err = io::Error::from(reserve_err);
+    assert_eq!(io::ErrorKind::OutOfMemory, io_err.kind());
+}