fix(core): panic on big string allocation (#7395)

Co-authored-by: Bert Belder <bertbelder@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/core/encode_decode_test.js b/core/encode_decode_test.js
index 69e6e053b..bbb52252e 100644
--- a/core/encode_decode_test.js
+++ b/core/encode_decode_test.js
@@ -41,6 +41,17 @@ function main() {
 
   assert(Deno.core.decode(new Uint8Array(fixture1)) === "𝓽𝓮𝔁𝓽");
   assert(Deno.core.decode(new Uint8Array(fixture2)) === "Hello �� World");
+
+  // See https://github.com/denoland/deno/issues/6649
+  let thrown = false;
+  try {
+    Deno.core.decode(new Uint8Array(2 ** 29));
+  } catch (e) {
+    thrown = true;
+    assert(e instanceof RangeError);
+    assert(e.message === "string too long");
+  }
+  assert(thrown);
 }
 
 main();