Fix typo in comment

compiler/rustc_arena/src/lib.rs

@@ -533,7 +533,7 @@ impl DropArena {
         ptr::write(mem, object);
         let result = &mut *mem;
         // Record the destructor after doing the allocation as that may panic
-        // and would cause `object`'s destuctor to run twice if it was recorded before
+        // and would cause `object`'s destructor to run twice if it was recorded before
         self.destructors
             .borrow_mut()
             .push(DropType { drop_fn: drop_for_type::<T>, obj: result as *mut T as *mut u8 });
@@ -560,7 +560,7 @@ impl DropArena {
         mem::forget(vec.drain(..));
 
         // Record the destructors after doing the allocation as that may panic
-        // and would cause `object`'s destuctor to run twice if it was recorded before
+        // and would cause `object`'s destructor to run twice if it was recorded before
         for i in 0..len {
             destructors.push(DropType {
                 drop_fn: drop_for_type::<T>,

compiler/rustc_data_structures/src/graph/vec_graph/mod.rs

@@ -29,7 +29,7 @@ impl<N: Idx> VecGraph<N> {
 
         // Create the *edge starts* array. We are iterating over over
         // the (sorted) edge pairs. We maintain the invariant that the
-        // length of the `node_starts` arary is enough to store the
+        // length of the `node_starts` array is enough to store the
         // current source node -- so when we see that the source node
         // for an edge is greater than the current length, we grow the
         // edge-starts array by just enough.

compiler/rustc_span/src/lib.rs

@@ -738,14 +738,14 @@ impl<D: Decoder> Decodable<D> for Span {
 }
 
 /// Calls the provided closure, using the provided `SourceMap` to format
-/// any spans that are debug-printed during the closure'e exectuino.
+/// any spans that are debug-printed during the closure's execution.
 ///
 /// Normally, the global `TyCtxt` is used to retrieve the `SourceMap`
 /// (see `rustc_interface::callbacks::span_debug1). However, some parts
 /// of the compiler (e.g. `rustc_parse`) may debug-print `Span`s before
 /// a `TyCtxt` is available. In this case, we fall back to
 /// the `SourceMap` provided to this function. If that is not available,
-/// we fall back to printing the raw `Span` field values
+/// we fall back to printing the raw `Span` field values.
 pub fn with_source_map<T, F: FnOnce() -> T>(source_map: Lrc<SourceMap>, f: F) -> T {
     SESSION_GLOBALS.with(|session_globals| {
         *session_globals.source_map.borrow_mut() = Some(source_map);