fix failed test

src/compiler/parse/read/context.ts

@@ -10,13 +10,20 @@ import {
 import { parse_expression_at } from "../acorn";
 import { Pattern } from "estree";
 
-export default function read_context(parser: Parser): Pattern {
+export default function read_context(
+	parser: Parser
+): Pattern & { start: number; end: number } {
 	const start = parser.index;
 	let i = parser.index;
 
 	const code = full_char_code_at(parser.template, i);
 	if (isIdentifierStart(code, true)) {
-		return { type: "Identifier", name: parser.read_identifier() };
+		return {
+			type: "Identifier",
+			name: parser.read_identifier(),
+			start,
+			end: parser.index
+		};
 	}
 
 	if (!is_bracket_open(code)) {
@@ -54,6 +61,12 @@ export default function read_context(parser: Parser): Pattern {
 	parser.index = i;
 
 	const pattern_string = parser.template.slice(start, i);
-	return (parse_expression_at(`${' '.repeat(start - 1)}(${pattern_string} = 1)`, start - 1) as any)
-		.left as Pattern;
+	try {
+		return (parse_expression_at(
+			`${" ".repeat(start - 1)}(${pattern_string} = 1)`,
+			start - 1
+		) as any).left;
+	} catch (error) {
+		parser.acorn_error(error);
+	}
 }

test/parser/samples/each-block-destructured/output.json

@@ -85,30 +85,80 @@
 					}
 				],
 				"context": {
+					"type": "ArrayPattern",
 					"start": 18,
 					"end": 39,
-					"type": "ArrayPattern",
+					"loc": {
+						"start": {
+							"line": 1,
+							"column": 18
+						},
+						"end": {
+							"line": 1,
+							"column": 39
+						}
+					},
 					"elements": [
 						{
+							"type": "Identifier",
 							"start": 19,
 							"end": 22,
-							"type": "Identifier",
+							"loc": {
+								"start": {
+									"line": 1,
+									"column": 19
+								},
+								"end": {
+									"line": 1,
+									"column": 22
+								}
+							},
 							"name": "key"
 						},
 						{
+							"type": "Identifier",
 							"start": 24,
 							"end": 29,
-							"type": "Identifier",
+							"loc": {
+								"start": {
+									"line": 1,
+									"column": 24
+								},
+								"end": {
+									"line": 1,
+									"column": 29
+								}
+							},
 							"name": "value"
 						},
 						{
+							"type": "RestElement",
 							"start": 31,
 							"end": 38,
-							"type": "RestElement",
+							"loc": {
+								"start": {
+									"line": 1,
+									"column": 31
+								},
+								"end": {
+									"line": 1,
+									"column": 38
+								}
+							},
 							"argument": {
 								"type": "Identifier",
 								"start": 34,
 								"end": 38,
+								"loc": {
+									"start": {
+										"line": 1,
+										"column": 34
+									},
+									"end": {
+										"line": 1,
+										"column": 38
+									}
+								},
 								"name": "rest"
 							}
 						}

test/validator/samples/each-block-destructured-object-rest-comma-after/errors.json

@@ -1,5 +1,5 @@
 [{
-	"code": "comma-after-rest",
+	"code": "parse-error",
 	"message": "Comma is not permitted after the rest element",
 	"pos": 100,
 	"start": {

test/validator/samples/each-block-invalid-context-destructured-object/errors.json

@@ -1,6 +1,6 @@
 [{
-	"code": "unexpected-reserved-word",
-	"message": "'case' is a reserved word in JavaScript and cannot be used here",
+	"code": "parse-error",
+	"message": "Unexpected keyword 'case'",
 	"start": {
 		"line": 1,
 		"column": 18,

test/validator/samples/each-block-invalid-context-destructured/errors.json

@@ -1,6 +1,6 @@
 [{
-	"code": "unexpected-reserved-word",
-	"message": "'case' is a reserved word in JavaScript and cannot be used here",
+	"code": "parse-error",
+	"message": "Unexpected token",
 	"start": {
 		"line": 1,
 		"column": 17,