d2lsp: getboardatposition edge case

d2lsp/d2lsp.go

@@ -143,6 +143,11 @@ func getBoardPathAtPosition(m d2ast.Map, currPath []string, pos d2ast.Position)
 				return deeperPath
 			}
 
+			// We're in between boards, e.g. layers.x.scenarios
+			// Which means, there's no board at this position
+			if len(newPath)%2 == 1 {
+				return nil
+			}
 			// Nothing deeper matched but we're in this map's range, return current path
 			return newPath
 		}

d2lsp/d2lsp_test.go

@@ -291,6 +291,19 @@ layers: {
 			position: d2ast.Position{Line: 3, Column: 2},
 			want:     []string{"layers", "basic"},
 		},
+		{
+			name: "cursor in between",
+			fs: map[string]string{
+				"index.d2": `
+		layers: {
+			basic: {
+			}
+		}`,
+			},
+			path:     "index.d2",
+			position: d2ast.Position{Line: 2, Column: 2},
+			want:     nil,
+		},
 	}
 
 	for _, tt := range tests {