[Fix] jsx-wrap-multilines: fix crash with declarations that are on a new line after =

Fixes #2875.

Author: ljharb

CHANGELOG.md

@@ -9,6 +9,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 * [`jsx-key`]: added `checkKeyMustBeforeSpread` option for new jsx transform ([#2835][] @morlay)
 * [`jsx-newline`]: add new rule ([#2693][] @jzabala)
 * [`jsx-no-constructed-context-values`]: add new rule which checks when the value passed to a Context Provider will cause needless rerenders ([#2763][] @dylanOshima)
+* [`jsx-wrap-multilines`]: fix crash with `declaration`s that are on a new line after `=` ([#2875][] @ljharb)
 
 ### Fixed
 * [`display-name`]/component detection: avoid a crash on anonymous components ([#2840][] @ljharb)
@@ -18,6 +19,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 * [`no-typos`]: avoid crash with computed method name ([#2870][] @ljharb, @AriPerkkio)
 * [`jsx-max-depth`]: avoid crash with childless jsx child ([#2869][] @ljharb, @AriPerkkio)
 
+[#2871]: https://github.com/yannickcr/eslint-plugin-react/issues/2875
 [#2871]: https://github.com/yannickcr/eslint-plugin-react/issues/2871
 [#2870]: https://github.com/yannickcr/eslint-plugin-react/issues/2870
 [#2869]: https://github.com/yannickcr/eslint-plugin-react/issues/2869

lib/rules/jsx-wrap-multilines.js

@@ -157,14 +157,15 @@ module.exports = {
         if (!isParenthesised(node)) {
           const tokenBefore = sourceCode.getTokenBefore(node, {includeComments: true});
           const tokenAfter = sourceCode.getTokenAfter(node, {includeComments: true});
-          if (tokenBefore.loc.end.line < node.loc.start.line) {
+          const start = node.loc.start;
+          if (tokenBefore.loc.end.line < start.line) {
             // Strip newline after operator if parens newline is specified
             report(
               node,
               MISSING_PARENS,
               (fixer) => fixer.replaceTextRange(
                 [tokenBefore.range[0], tokenAfter && (tokenAfter.value === ';' || tokenAfter.value === '}') ? tokenAfter.range[0] : node.range[1]],
-                `${trimTokenBeforeNewline(node, tokenBefore)}(\n${' '.repeat(node.loc.start.column)}${sourceCode.getText(node)}\n${' '.repeat(node.loc.start.column - 2)})`
+                `${trimTokenBeforeNewline(node, tokenBefore)}(\n${start.column > 0 ? ' '.repeat(start.column) : ''}${sourceCode.getText(node)}\n${start.column > 0 ? ' '.repeat(start.column - 2) : ''})`
               )
             );
           } else {

tests/lib/rules/jsx-wrap-multilines.js

@@ -1250,5 +1250,25 @@ ruleTester.run('jsx-wrap-multilines', rule, {
       output: ARROW_WITH_LOGICAL_AUTOFIX,
       options: [{logical: 'parens-new-line'}],
       errors: [{message: MISSING_PARENS}]
+    }, {
+      code: [
+        'import React from \'react\';',
+        '',
+        'const A =',
+        '<div>',
+        '    B',
+        '</div>;'
+      ].join('\n'),
+      output: [
+        'import React from \'react\';',
+        '',
+        'const A = (',
+        '<div>',
+        '    B',
+        '</div>',
+        ');'
+      ].join('\n'),
+      options: [{declaration: 'parens-new-line'}],
+      errors: [{message: MISSING_PARENS}]
     }]
 });