set `did_panic` flag (#3687)

3 files changed, 13 insertions, 1 deletions

diff --git a/src/js_lexer.zig b/src/js_lexer.zig
index e8b852d0d..a0ad75c7b 100644
--- a/src/js_lexer.zig
+++ b/src/js_lexer.zig
@@ -1793,6 +1793,7 @@ fn NewLexer_(
                 }
             };
 
+            lexer.did_panic = true;
             try lexer.addRangeError(lexer.range(), "Unexpected {s}", .{found}, true);
         }
 
diff --git a/src/js_parser.zig b/src/js_parser.zig
index d20c1a868..2d00654c9 100644
--- a/src/js_parser.zig
+++ b/src/js_parser.zig
@@ -11633,7 +11633,11 @@ fn NewParser_(
                         error.Backtrack => {
                             backtrack = true;
                         },
-                        else => {},
+                        else => {
+                            if (p.lexer.did_panic) {
+                                backtrack = true;
+                            }
+                        },
                     }
                     if (comptime FnReturnType == anyerror!bool or FnReturnType == anyerror!void)
                         // we are not using the value
diff --git a/test/transpiler/transpiler.test.js b/test/transpiler/transpiler.test.js
index 3040a9913..f83c00296 100644
--- a/test/transpiler/transpiler.test.js
+++ b/test/transpiler/transpiler.test.js
@@ -106,6 +106,13 @@ describe("Bun.Transpiler", () => {
       ts.expectPrinted_("import Foo = Baz.Bar;\nexport default Foo;", "const Foo = Baz.Bar;\nexport default Foo");
     });
 
+    it("ternary should parse correctly when parsing typescript fails", () => {
+      ts.expectPrinted_(
+        "var c = Math.random() ? ({ ...{} }) : ({ ...{} })",
+        "var c = Math.random() ? { ...{} } : { ...{} }",
+      );
+    });
+
     it.todo("instantiation expressions", async () => {
       const exp = ts.expectPrinted_;
       const err = ts.expectParseError;