diff --git a/Cargo.lock b/Cargo.lock
index 26b04bfb46a..47179a7f650 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2027,7 +2027,7 @@ dependencies = [
  "hashglobe 0.1.0",
  "hyper 0.10.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper_serde 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "mozjs 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mozjs 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "selectors 0.20.0",
  "serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2228,7 +2228,7 @@ dependencies = [
 
 [[package]]
 name = "mozjs"
-version = "0.9.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cc 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3027,7 +3027,7 @@ dependencies = [
  "mime_guess 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mitochondria 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozangle 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "mozjs 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mozjs 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "msg 0.0.1",
  "net_traits 0.0.1",
  "num-traits 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4516,7 +4516,7 @@ dependencies = [
 "checksum miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
 "checksum mitochondria 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9de3eca27871df31c33b807f834b94ef7d000956f57aa25c5aed9c5f0aae8f6f"
 "checksum mozangle 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "45a8a18a41cfab0fde25cc2f43ea89064d211a0fbb33225b8ff93ab20406e0e7"
-"checksum mozjs 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ffc9dc067f7e480f29ee32612b2aa76498c81926270c8190b8fe956b519dd659"
+"checksum mozjs 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ece829d04e44055b25d373bc92c28a032b549073bea8a5e57ca1c4b355d8377f"
 "checksum mozjs_sys 0.61.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1ff07b0f0a2371dc08d75d55371ca311be67e1fdfa6c146fc8ad154c340f70c9"
 "checksum mp3-metadata 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ab5f1d2693586420208d1200ce5a51cd44726f055b635176188137aff42c7de"
 "checksum mp4parse 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7316728464443fe5793a805dde3257864e9690cf46374daff3ce93de1df2f254"
diff --git a/components/script/dom/audiobuffer.rs b/components/script/dom/audiobuffer.rs
index ccce8510586..8a2ae5e158b 100644
--- a/components/script/dom/audiobuffer.rs
+++ b/components/script/dom/audiobuffer.rs
@@ -235,6 +235,10 @@ impl AudioBufferMethods for AudioBuffer {
         channel_number: u32,
         start_in_channel: u32,
     ) -> Fallible<()> {
+        if destination.is_shared() {
+            return Err(Error::Type("Cannot copy to shared buffer".to_owned()));
+        }
+
         if channel_number >= self.number_of_channels || start_in_channel > self.length {
             return Err(Error::IndexSize);
         }
@@ -276,6 +280,10 @@ impl AudioBufferMethods for AudioBuffer {
         channel_number: u32,
         start_in_channel: u32,
     ) -> Fallible<()> {
+        if source.is_shared() {
+            return Err(Error::Type("Cannot copy from shared buffer".to_owned()));
+        }
+
         if channel_number >= self.number_of_channels || start_in_channel > (source.len() as u32) {
             return Err(Error::IndexSize);
         }