Adding more tests to prevent regression again :sweat

pkg/yqlib/operator_select_test.go

@@ -5,6 +5,12 @@ import (
 )
 
 var selectOperatorScenarios = []expressionScenario{
+	{
+		skipDoc:    true,
+		document:   `cat: pants`,
+		expression: `select(.nope) | key + " why though?"`,
+		expected:   []string{},
+	},
 	{
 		skipDoc:    true,
 		document:   `cat`,