add grid_panic regression test

e2etests/regression_test.go

@@ -681,6 +681,28 @@ explanation: |md
 
 And other normal markdown stuff
 |
+`,
+		},
+		{
+			name: "grid_panic",
+			script: `
+			2 rows 1 obj: {
+				grid-rows: 2
+
+				one
+			}
+			3 rows 2 obj: {
+				grid-rows: 3
+
+				one
+				two
+			}
+			4 columns 2 obj: {
+				grid-columns: 4
+
+				one
+				two
+			}
 `,
 		},
 	}