--- nono/debugger/debugger.cpp	2026/04/29 17:05:32	1.1.1.17
+++ nono/debugger/debugger.cpp	2026/04/29 17:05:41	1.1.1.18
@@ -103,8 +103,11 @@ bool
 Debugger::Create()
 {
 	// ホストドライバを作成
-	hostcom.reset(new HostCOMDevice(this, "Debugger"));
+	try {
+		hostcom.reset(new HostCOMDevice(this, "Debugger"));
+	} catch (...) { }
 	if ((bool)hostcom == false) {
+		warnx("Failed to initialize HostCOMDevice at %s", __method__);
 		return false;
 	}
 
@@ -136,14 +139,28 @@ Debugger::Init()
 
 	syncer = GetSyncer();
 
-	if (gMainApp.Has(VMCap::M88K)) {
-		md_mpu.reset(new DebuggerMD_m88xx0(this));
-	} else {
-		md_mpu.reset(new DebuggerMD_m680x0(this));
+	try {
+		if (gMainApp.Has(VMCap::M88K)) {
+			md_mpu.reset(new DebuggerMD_m88xx0(this));
+		} else {
+			md_mpu.reset(new DebuggerMD_m680x0(this));
+		}
+	} catch (...) { }
+	if ((bool)md_mpu == false) {
+		warnx("Failed to initialize md_mpu at %s", __method__);
+		return false;
 	}
+
 	if (gMainApp.Has(VMCap::LUNA)) {
-		md_xp.reset(new DebuggerMD_hd64180(this));
+		try {
+			md_xp.reset(new DebuggerMD_hd64180(this));
+		} catch (...) { }
+		if ((bool)md_xp == false) {
+			warnx("Failed to initialize md_xp at %s", __method__);
+			return false;
+		}
 	}
+
 	// とりあえずメインプロセッサに固定
 	curmd = md_mpu.get();