WIP

hashicorp · Apr 3, 2023 · b7a73a0 · b7a73a0
1 parent cc1de18
commit b7a73a0
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/decoder/expr_function.go b/decoder/expr_function.go
@@ -41,9 +41,14 @@ func (fe functionExpr) CompletionAtPos(ctx context.Context, pos hcl.Pos) []lang.
 			return []lang.Candidate{}
 		}
 		prefixLen := pos.Byte - eType.Traversal.SourceRange().Start.Byte
-		prefix := eType.Traversal.RootName()[0:prefixLen]
 
-		return fe.matchingFunctions(prefix, eType.Range())
+		rootName := eType.Traversal.RootName()
+		if prefixLen <= len(rootName) {
+			prefix := rootName[0:prefixLen]
+			return fe.matchingFunctions(prefix, eType.Range())
+		}
+
+		return []lang.Candidate{}
 	case *hclsyntax.FunctionCallExpr:
 		if eType.NameRange.ContainsPos(pos) {
 			prefixLen := pos.Byte - eType.NameRange.Start.Byte