From b09b9f55fc774297d5254e7507583601a33076ea Mon Sep 17 00:00:00 2001
From: tintinweb <tintinweb@oststrom.com>
Date: Fri, 31 Jan 2020 15:50:07 +0100
Subject: [PATCH] add regression tests for #20611

---
 eth/tracers/tracer_test.go | 40 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/eth/tracers/tracer_test.go b/eth/tracers/tracer_test.go
index a45a121159..4f1b982bf8 100644
--- a/eth/tracers/tracer_test.go
+++ b/eth/tracers/tracer_test.go
@@ -63,6 +63,46 @@ func runTrace(tracer *Tracer) (json.RawMessage, error) {
 	return tracer.GetResult()
 }
 
+func TestRegressionPanicSlice(t *testing.T) {
+	tracer, err := New("{depths: [], step: function(log) { this.depths.push(log.memory.slice(-1,-2)); }, fault: function() {}, result: function() { return this.depths; }}")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ret, err := runTrace(tracer)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("Got result %s", string(ret))
+}
+
+func TestRegressionPanicPeek(t *testing.T) {
+	tracer, err := New("{depths: [], step: function(log) { this.depths.push(log.stack.peek(-1)); }, fault: function() {}, result: function() { return this.depths; }}")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ret, err := runTrace(tracer)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("Expected return value to be [0,1,2], got %s", string(ret))
+}
+
+
+func TestRegressionPanicGetUint(t *testing.T) {
+	tracer, err := New("{ depths: [], step: function(log, db) { this.depths.push(log.memory.getUint(-64));}, fault: function() {}, result: function() { return this.depths; }}")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ret, err := runTrace(tracer)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("Expected return value to be [0,1,2], got %s", string(ret))
+}
+
 func TestTracing(t *testing.T) {
 	tracer, err := New("{count: 0, step: function() { this.count += 1; }, fault: function() {}, result: function() { return this.count; }}")
 	if err != nil {