From 336e9eeb67622ebebb59a787cb7ede7c61c38c01 Mon Sep 17 00:00:00 2001
From: ascandone <alescandone@gmail.com>
Date: Mon, 5 Aug 2024 16:46:26 +0200
Subject: [PATCH] fixed runtime err

---
 analysis/hover.go      |  5 ++++-
 analysis/hover_test.go | 11 +++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/analysis/hover.go b/analysis/hover.go
index 7505d2d..d92574d 100644
--- a/analysis/hover.go
+++ b/analysis/hover.go
@@ -78,6 +78,9 @@ func hoverOnVar(varDecl parser.VarDeclaration, position parser.Position) Hover {
 
 func hoverOnSentValue(sentValue parser.SentValue, position parser.Position) Hover {
 	switch sentValue := sentValue.(type) {
+	case nil:
+		return nil
+
 	case *parser.SentValueAll:
 		return hoverOnLiteral(sentValue.Asset, position)
 
@@ -216,7 +219,7 @@ func hoverOnSource(source parser.Source, position parser.Position) Hover {
 
 func hoverOnKeptOrDestination(inorderClause parser.KeptOrDestination, position parser.Position) Hover {
 	switch inorderClause := inorderClause.(type) {
-	case *parser.DestinationKept:
+	case nil, *parser.DestinationKept:
 		return nil
 
 	case *parser.DestinationTo:
diff --git a/analysis/hover_test.go b/analysis/hover_test.go
index 254b44a..994a61b 100644
--- a/analysis/hover_test.go
+++ b/analysis/hover_test.go
@@ -384,6 +384,17 @@ func TestHoverFaultTolerance(t *testing.T) {
 		assert.Nil(t, hover)
 	})
 
+	t.Run("missing sent value", func(t *testing.T) {
+		input := `
+			send <invalidtk> (
+			)
+		`
+		rng := RangeOfIndexed(input, "<invalidtk>", 0)
+		program := parser.Parse(input).Value
+		hover := analysis.HoverOn(program, rng.Start)
+		assert.Nil(t, hover)
+	})
+
 	t.Run("missing inorder clause", func(t *testing.T) {
 		input := `
 			send [COIN 10] (