From 90a55f796203cd2e41c10f480c404280f378b001 Mon Sep 17 00:00:00 2001
From: max <max@example.com>
Date: Mon, 6 Jul 2026 03:55:03 +0200
Subject: [PATCH] fix(has): return false for negative array indices

The sequence branch only checked the upper bound (len > index), so has(-1) returned true even on an empty array. Guard index >= 0.
---
 pkg/yqlib/operator_has.go      |  2 +-
 pkg/yqlib/operator_has_test.go | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/pkg/yqlib/operator_has.go b/pkg/yqlib/operator_has.go
index d9fc6320..dd60ecdc 100644
--- a/pkg/yqlib/operator_has.go
+++ b/pkg/yqlib/operator_has.go
@@ -44,7 +44,7 @@ func hasOperator(d *dataTreeNavigator, context Context, expressionNode *Expressi
 				if errParsingInt != nil {
 					return Context{}, errParsingInt
 				}
-				candidateHasKey = int64(len(contents)) > number
+				candidateHasKey = number >= 0 && int64(len(contents)) > number
 			}
 			results.PushBack(createBooleanCandidate(candidate, candidateHasKey))
 		default:
diff --git a/pkg/yqlib/operator_has_test.go b/pkg/yqlib/operator_has_test.go
index bed11fcb..47a708af 100644
--- a/pkg/yqlib/operator_has_test.go
+++ b/pkg/yqlib/operator_has_test.go
@@ -71,6 +71,16 @@ var hasOperatorScenarios = []expressionScenario{
 			"D0, P[4], (!!bool)::true\n",
 		},
 	},
+	{
+		skipDoc:     true,
+		description: "Negative array index is never present",
+		document:    "[[1, 2, 3], []]",
+		expression:  `.[] | has(-1)`,
+		expected: []string{
+			"D0, P[0], (!!bool)::false\n",
+			"D0, P[1], (!!bool)::false\n",
+		},
+	},
 }
 
 func TestHasOperatorScenarios(t *testing.T) {