no-lonely-if: Fix an edge case (#2168)

Author: fisker

rules/no-lonely-if.js

@@ -97,7 +97,7 @@ function fix(innerIfStatement, sourceCode) {
 			const lastToken = sourceCode.getLastToken(inner.consequent);
 			if (isNotSemicolonToken(lastToken)) {
 				const nextToken = sourceCode.getTokenAfter(outer);
-				if (needsSemicolon(lastToken, sourceCode, nextToken.value)) {
+				if (nextToken && needsSemicolon(lastToken, sourceCode, nextToken.value)) {
 					yield fixer.insertTextBefore(nextToken, ';');
 				}
 			}

test/no-lonely-if.mjs

@@ -51,6 +51,11 @@ test.snapshot({
 		`,
 		// No `BlockStatement`
 		'if (a) if (b) foo();',
+		outdent`
+			if (a) {
+				if (b) foo()
+			}
+		`,
 		// `EmptyStatement`
 		'if (a) if (b);',
 		// Nested

test/snapshots/no-lonely-if.mjs.md

@@ -89,6 +89,26 @@ Generated by [AVA](https://avajs.dev).
     `
 
 ## Invalid #5
+      1 | if (a) {
+      2 | 	if (b) foo()
+      3 | }
+
+> Output
+
+    `␊
+      1 | if (a && b) foo()␊
+    `
+
+> Error 1/1
+
+    `␊
+      1 | if (a) {␊
+    > 2 | 	if (b) foo()␊
+        | 	^^^^^^^^^^^^ Unexpected \`if\` as the only statement in a \`if\` block without \`else\`.␊
+      3 | }␊
+    `
+
+## Invalid #6
       1 | if (a) if (b);
 
 > Output
@@ -104,7 +124,7 @@ Generated by [AVA](https://avajs.dev).
         |        ^^^^^^^ Unexpected \`if\` as the only statement in a \`if\` block without \`else\`.␊
     `
 
-## Invalid #6
+## Invalid #7
       1 | if (a) {
       2 | 	if (b) {
       3 | 		// Should not report
@@ -140,7 +160,7 @@ Generated by [AVA](https://avajs.dev).
       8 | }␊
     `
 
-## Invalid #7
+## Invalid #8
        1 | function * foo() {
        2 | 	if (a || b)
        3 | 	if (a ?? b)
@@ -325,7 +345,7 @@ Generated by [AVA](https://avajs.dev).
       11 | }␊
     `
 
-## Invalid #8
+## Invalid #9
       1 | async function foo() {
       2 | 	if (a)
       3 | 	if (await a)
@@ -380,7 +400,7 @@ Generated by [AVA](https://avajs.dev).
       6 | }␊
     `
 
-## Invalid #9
+## Invalid #10
       1 | if (((a || b))) if (((c || d)));
 
 > Output
@@ -396,7 +416,7 @@ Generated by [AVA](https://avajs.dev).
         |                 ^^^^^^^^^^^^^^^^ Unexpected \`if\` as the only statement in a \`if\` block without \`else\`.␊
     `
 
-## Invalid #10
+## Invalid #11
        1 | if // 1
        2 | (
        3 | 	// 2
@@ -472,7 +492,7 @@ Generated by [AVA](https://avajs.dev).
       19 | }␊
     `
 
-## Invalid #11
+## Invalid #12
       1 | if (a) {
       2 | 	if (b) foo()
       3 | }
@@ -495,7 +515,7 @@ Generated by [AVA](https://avajs.dev).
       4 | [].forEach(bar)␊
     `
 
-## Invalid #12
+## Invalid #13
       1 | if (a)
       2 | 	if (b) foo()
       3 | ;[].forEach(bar)
@@ -517,7 +537,7 @@ Generated by [AVA](https://avajs.dev).
         | ^^ Unexpected \`if\` as the only statement in a \`if\` block without \`else\`.␊
     `
 
-## Invalid #13
+## Invalid #14
       1 | if (a) {
       2 | 	if (b) foo()
       3 | }