automatically adding () to the expression to be printed

An expression like {a:2} is ambiguous since it can be an object literal with property a and value 2 or a statement block with label a and one expression inside, 2. Adding () disambiguates {}.

1 files changed, 2 insertions, 0 deletions

diff --git a/modules/script/_bootstrap/debugger.js b/modules/script/_bootstrap/debugger.js
index 6ae0d9c2..dc42228f 100644
--- a/modules/script/_bootstrap/debugger.js
+++ b/modules/script/_bootstrap/debugger.js
@@ -324,10 +324,12 @@ function splitPrintOptions(s, style) {
 
 function doPrint(expr, style) {
     // This is the real deal.
+    expr = `(${expr})`;
     const cv = saveExcursion(
         () => focusedFrame === null
             ? debuggeeGlobalWrapper.executeInGlobalWithBindings(expr, debuggeeValues)
             : focusedFrame.evalWithBindings(expr, debuggeeValues));
+
     if (cv === null) {
         print('Debuggee died.');
     } else if ('return' in cv) {