From df02a83d79d10f2a22cb83e6a452c916ad0b7b7d Mon Sep 17 00:00:00 2001
From: waqar bin zafar <waqarniazi51@gmail.com>
Date: Mon, 25 May 2026 09:46:28 +0500
Subject: [PATCH] repl: fix crash when bare 'import' is typed

---
 lib/repl.js                                        |  7 ++++++-
 test/parallel/test-repl-import-incomplete-crash.js | 13 +++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 test/parallel/test-repl-import-incomplete-crash.js

diff --git a/lib/repl.js b/lib/repl.js
index 60ea4457ab1bf6..5a5b4acdd5e860 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -250,7 +250,12 @@ writer.options = { ...inspect.defaultOptions, showProxy: true };
 // Converts static import statement to dynamic import statement
 const toDynamicImport = (codeLine) => {
   let dynamicImportStatement = '';
-  const ast = acornParse(codeLine, { __proto__: null, sourceType: 'module', ecmaVersion: 'latest' });
+  let ast;
+  try {
+    ast = acornParse(codeLine, { __proto__: null, sourceType: 'module', ecmaVersion: 'latest' });
+  } catch {
+    return codeLine;
+  }
   acornWalk.ancestor(ast, {
     ImportDeclaration(node) {
       const awaitDynamicImport = `await import(${JSONStringify(node.source.value)});`;
diff --git a/test/parallel/test-repl-import-incomplete-crash.js b/test/parallel/test-repl-import-incomplete-crash.js
new file mode 100644
index 00000000000000..bc1d48821f516c
--- /dev/null
+++ b/test/parallel/test-repl-import-incomplete-crash.js
@@ -0,0 +1,13 @@
+'use strict';
+const common = require('../common');
+const child_process = require('child_process');
+const assert = require('assert');
+
+// Regression test for https://github.com/nodejs/node/issues/63551:
+// Typing a bare `import` keyword in the REPL must not crash the process.
+const proc = child_process.spawn(process.execPath, ['-i']);
+proc.on('error', common.mustNotCall());
+proc.on('exit', common.mustCall((code) => {
+  assert.strictEqual(code, 0);
+}));
+proc.stdin.write('import\n.exit\n');