address 2 of Daniel's comments

cranelift/wasm/src/code_translator.rs

@@ -2642,11 +2642,7 @@ pub fn translate_operator<FE: FuncEnvironment + ?Sized>(
 
  // We have an actual handling block for this tag, rather than just forwarding.
  // Detatch the continuation object by setting its parent to NULL.
- let pointer_type = environ.pointer_type();
- // TODO(frank-emrich): Would be nice to use a target-specific
- // constant for the null pointer here, rather than the literal
- // 0.
- let null = builder.ins().iconst(pointer_type, 0);
+ let null = builder.ins().null(environ.pointer_type());
  environ.typed_continuations_store_parent(builder, resumed_contobj, null);
 
  state.pushn(&params);

crates/runtime/src/continuation.rs

@@ -381,7 +381,7 @@ pub fn resume(
 
  // Note that this function updates the typed continuation store field in the
  // VMContext (i.e., the currently running continuation), but does not update
- // any parent pointers. The latter has to happend elsewhere.
+ // any parent pointers. The latter has to happen elsewhere.
 
  // We mark `contobj` as the currently running one
  instance.set_typed_continuations_store(contobj);