fix(parser): reject async await => {} in scripts (#15222)

`async await => {}` was rejected in modules but should be rejected in scripts as well.

Author: sapphi-red

crates/oxc_parser/src/js/arrow.rs

@@ -41,6 +41,10 @@ impl<'a> ParserImpl<'a> {
             let Expression::Identifier(ident) = &expr else {
                 return self.unexpected();
             };
+            // It is a Syntax Error if ArrowParameters Contains AwaitExpression is true.
+            if ident.name == "await" {
+                self.error(diagnostics::identifier_async("await", ident.span));
+            }
             return Some(self.parse_simple_arrow_function_expression(
                 span,
                 ident,

tasks/coverage/misc/pass/oxc-11487.cjs renamed to tasks/coverage/misc/fail/oxc-11487.cjs

@@ -1,3 +1,3 @@
 codegen_misc Summary:
-AST Parsed     : 49/49 (100.00%)
-Positive Passed: 49/49 (100.00%)
+AST Parsed     : 48/48 (100.00%)
+Positive Passed: 48/48 (100.00%)

tasks/coverage/snapshots/codegen_misc.snap

@@ -1,5 +1,3 @@
 formatter_misc Summary:
-AST Parsed     : 49/49 (100.00%)
-Positive Passed: 48/49 (97.96%)
-Expect to Parse: tasks/coverage/misc/pass/oxc-11487.cjs
-Cannot use `await` as an identifier in an async context
+AST Parsed     : 48/48 (100.00%)
+Positive Passed: 48/48 (100.00%)

tasks/coverage/snapshots/formatter_misc.snap

@@ -3,9 +3,7 @@ commit: 4cc3d888
 parser_babel Summary:
 AST Parsed     : 2422/2440 (99.26%)
 Positive Passed: 2395/2440 (98.16%)
-Negative Passed: 1675/1752 (95.61%)
-Expect Syntax Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/es2017/async-functions/async-await-as-arrow-binding-identifier/input.js
-
+Negative Passed: 1676/1752 (95.66%)
 Expect Syntax Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/es2018/object-rest-spread/comma-after-rest/input.js
 
 Expect Syntax Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/es2018/object-rest-spread/comma-after-spread-for-in/input.js
@@ -5632,6 +5630,12 @@ Expect to Parse: tasks/coverage/babel/packages/babel-parser/test/fixtures/typesc
    ╰────
   help: Either remove this `await` or add the `async` keyword to the enclosing function
 
+  × Cannot use `await` as an identifier in an async context
+   ╭─[babel/packages/babel-parser/test/fixtures/es2017/async-functions/async-await-as-arrow-binding-identifier/input.js:1:7]
+ 1 │ async await => {}
+   ·       ─────
+   ╰────
+
   × Expected a semicolon or an implicit semicolon after a statement, but found none
    ╭─[babel/packages/babel-parser/test/fixtures/es2017/async-functions/async-function-and-non-bmp-character/input.js:1:6]
  1 │ async function𝐬 f() {}

tasks/coverage/snapshots/parser_babel.snap

@@ -1,7 +1,7 @@
 parser_misc Summary:
-AST Parsed     : 49/49 (100.00%)
-Positive Passed: 49/49 (100.00%)
-Negative Passed: 93/93 (100.00%)
+AST Parsed     : 48/48 (100.00%)
+Positive Passed: 48/48 (100.00%)
+Negative Passed: 94/94 (100.00%)
 
   × Cannot assign to 'arguments' in strict mode
    ╭─[misc/fail/arguments-eval.ts:1:10]
@@ -124,6 +124,12 @@ Negative Passed: 93/93 (100.00%)
    ·                 ────
    ╰────
 
+  × Cannot use `await` as an identifier in an async context
+   ╭─[misc/fail/oxc-11487.cjs:1:7]
+ 1 │ async await => {}
+   ·       ─────
+   ╰────
+
   × Unexpected token
    ╭─[misc/fail/oxc-11487.mjs:1:13]
  1 │ async await => {}

tasks/coverage/snapshots/parser_misc.snap

@@ -1,6 +1,6 @@
 semantic_misc Summary:
-AST Parsed     : 49/49 (100.00%)
-Positive Passed: 31/49 (63.27%)
+AST Parsed     : 48/48 (100.00%)
+Positive Passed: 30/48 (62.50%)
 semantic Error: tasks/coverage/misc/pass/oxc-11593.ts
 Scope children mismatch:
 after transform: ScopeId(0): [ScopeId(1)]

tasks/coverage/snapshots/semantic_misc.snap

@@ -1,3 +1,3 @@
 transformer_misc Summary:
-AST Parsed     : 49/49 (100.00%)
-Positive Passed: 49/49 (100.00%)
+AST Parsed     : 48/48 (100.00%)
+Positive Passed: 48/48 (100.00%)