debugger: fix behavior of { a: 1 } in the debugger repl

fix: #46808

Author: meixg

lib/internal/debugger/inspect_repl.js

@@ -575,8 +575,16 @@ function createRepl(inspector) {
     if (input === '\n') return lastCommand;
     // Add parentheses: exec process.title => exec("process.title");
     const match = RegExpPrototypeExec(/^\s*(?:exec|p)\s+([^\n]*)/, input);
+    input = match ? match[1] : input;
+
+    // Add parentheses to make sure input is parsed as expression
+    if (RegExpPrototypeExec(/^\s*{/, input) !== null &&
+        RegExpPrototypeExec(/;\s*$/, input) === null) {
+      input = `(${StringPrototypeTrim(input)})\n`;
+    }
+
     if (match) {
-      lastCommand = `exec(${JSONStringify(match[1])})`;
+      lastCommand = `exec(${JSONStringify(input)})`;
     } else {
       lastCommand = input;
     }