3 files changed, 5 insertions, 5 deletions
diff --git a/components/script/dom/imagedata.rs b/components/script/dom/imagedata.rs
index 9e80d86d089..e80914d8aea 100644
--- a/components/script/dom/imagedata.rs
+++ b/components/script/dom/imagedata.rs
@@ -65,7 +65,7 @@ impl ImageData {
         if let Some(jsobject) = opt_jsobject {
             let cx = global.get_cx();
             typedarray!(in(cx) let array_res: Uint8ClampedArray = jsobject);
-            let mut array = array_res
+            let array = array_res
                 .map_err(|_| Error::Type("Argument to Image data is not an Uint8ClampedArray".to_owned()))?;
 
             let byte_len = array.as_slice().len() as u32;
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index e265c83aa90..d520985aafe 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -1979,7 +1979,7 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
 
         typedarray!(in(cx) let array_buffer: ArrayBuffer = data);
         let data_vec = match array_buffer {
-            Ok(mut data) => data.to_vec(),
+            Ok(data) => data.to_vec(),
             Err(_) => fallible_array_buffer_view_to_vec(cx, data)?,
         };
 
@@ -2016,8 +2016,8 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
     fn BufferSubData(&self, target: u32, offset: i64, data: ArrayBufferViewOrArrayBuffer) {
         let data_vec = match data {
             // Typed array is rooted, so we can safely temporarily retrieve its slice
-            ArrayBufferViewOrArrayBuffer::ArrayBuffer(mut inner) => inner.to_vec(),
-            ArrayBufferViewOrArrayBuffer::ArrayBufferView(mut inner) => inner.to_vec(),
+            ArrayBufferViewOrArrayBuffer::ArrayBuffer(inner) => inner.to_vec(),
+            ArrayBufferViewOrArrayBuffer::ArrayBufferView(inner) => inner.to_vec(),
         };
 
         let bound_buffer = handle_potential_webgl_error!(self, self.bound_buffer(target), return);
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 4d6fca64cbd..22fed1e1652 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -1117,7 +1117,7 @@ impl Window {
     pub fn cancel_all_tasks(&self) {
         let mut ignore_flags = self.ignore_further_async_events.borrow_mut();
         for task_source_name in TaskSourceName::all() {
-            let mut flag = ignore_flags.entry(task_source_name).or_insert(Default::default());
+            let flag = ignore_flags.entry(task_source_name).or_insert(Default::default());
             let cancelled = mem::replace(&mut *flag, Default::default());
             cancelled.store(true, Ordering::Relaxed);
         }