Fixed SEGV error #1096

pkg/yqlib/operator_reduce.go

@@ -24,8 +24,6 @@ func reduceOperator(d *dataTreeNavigator, context Context, expressionNode *Expre
 	arrayExpNode := expressionNode.LHS.LHS
 	array, err := d.GetMatchingNodes(context, arrayExpNode)
 
-	log.Debugf("array of %v things", array.MatchingNodes.Len())
-
 	if err != nil {
 		return Context{}, err
 	}

pkg/yqlib/operator_variables.go

@@ -22,7 +22,7 @@ type assignVarPreferences struct {
 func assignVariableOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
 	lhs, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.LHS)
 	if err != nil {
-		return Context{}, nil
+		return Context{}, err
 	}
 	if expressionNode.RHS.Operation.OperationType.Type != "GET_VARIABLE" {
 		return Context{}, fmt.Errorf("RHS of 'as' operator must be a variable name e.g. $foo")

pkg/yqlib/operator_variables_test.go

@@ -13,6 +13,12 @@ var variableOperatorScenarios = []expressionScenario{
 			"D0, P[], (doc)::{}\n",
 		},
 	},
+	{
+		document:      "a: [cat]",
+		skipDoc:       true,
+		expression:    "(.[] | {.name: .}) as $item",
+		expectedError: `Cannot index array with 'name' (strconv.ParseInt: parsing "name": invalid syntax)`,
+	},
 	{
 		description: "Single value variable",
 		document:    `a: cat`,

pkg/yqlib/operators_test.go

@@ -25,6 +25,7 @@ type expressionScenario struct {
 	expression            string
 	expected              []string
 	skipDoc               bool
+	expectedError         string
 	dontFormatInputForDoc bool // dont format input doc for documentation generation
 }
 
@@ -94,6 +95,11 @@ func testScenario(t *testing.T, s *expressionScenario) {
 
 	context, err := NewDataTreeNavigator().GetMatchingNodes(Context{MatchingNodes: inputs}, node)
 
+	if s.expectedError != "" {
+		test.AssertResultComplexWithContext(t, s.expectedError, err.Error(), fmt.Sprintf("desc: %v\nexp: %v\ndoc: %v", s.description, s.expression, s.document))
+		return
+	}
+
 	if err != nil {
 		t.Error(fmt.Errorf("%w: %v", err, s.expression))
 		return