Исправление diff с пустым снимком

.vscode/launch.json

@@ -11,7 +11,14 @@
 			"name": "Build & Debug DUB project",
 			"cwd": "${command:dubWorkingDirectory}",
 			"program": "bin/${command:dubTarget}",
-			"args": []
+			"args": [
+				"--config",
+				"/etc/dwatch/config.json",
+				"snapshot",
+				"diff",
+				"-p",
+				"f3a3b9f9"
+			]
 		},
 		{
 			"name": "Debug D Program with sudo-gdb",

source/dwatch/cli/core.d

@@ -326,7 +326,8 @@ public:
 			Pager pager = new Pager(data.split('\n'),
 				format("Изменения файла %s от %s: %s diff %s",
 					snapshotMain.file, getDate(snapshotMain.created),
-					snapshotMain.id.toString, snapshotRelative.id.toString
+					snapshotMain.id.toString,
+					snapshotRelative is null ? "пустой" : snapshotRelative.id.toString
 				)
 			);
 			pager.render();