[async-functions] support await expressions in finally statements

src/asmjs/asm-wasm-builder.cc

Index: src/asmjs/asm-wasm-builder.cc
diff --git a/src/asmjs/asm-wasm-builder.cc b/src/asmjs/asm-wasm-builder.cc
index 0b60df1837039833406ab6ac2c6e9c97bfb53401..6710f48f962e7c90bc019dd14be8b8058c128a3d 100644
--- a/src/asmjs/asm-wasm-builder.cc
+++ b/src/asmjs/asm-wasm-builder.cc
@@ -310,6 +310,8 @@ class AsmWasmBuilderImpl final : public AstVisitor<AsmWasmBuilderImpl> {
     breakable_blocks_.pop_back();
   }
 
+  void VisitInternalVariable(InternalVariable* expr) { UNREACHABLE(); }
+
   void DoBreakOrContinue(BreakableStatement* target, bool is_continue) {
     DCHECK_EQ(kFuncScope, scope_);
     for (int i = static_cast<int>(breakable_blocks_.size()) - 1; i >= 0; --i) {