skylot/jadx · error · SmaliDebuggerException

Unexpected value

Error message

Unexpected value: ${tag}

What it means

Error "Unexpected value: ${tag}" thrown in skylot/jadx.

Solutions

1. Validate the JDWP tag byte against the known tag constants before the switch, and report the raw tag value when it is unsupported.
2. Treat unknown tags as a protocol mismatch: check the target VM's JDWP version and abort the operation with a clear message instead of a generic 'Unexpected value'.

When it happens

Trigger: Thrown at jadx-gui/src/main/java/jadx/gui/device/debugger/RuntimeType.java:77 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of skylot/jadx@e738a26571 (2026-08-14). Data as JSON: /api/errors/f4a93b9f2585b0d1. Report an issue: GitHub.

Appendix: source

Thrown at jadx-gui/src/main/java/jadx/gui/device/debugger/RuntimeType.java:77

				return RuntimeType.LONG;
			case JDWP.Tag.SHORT:
				return RuntimeType.SHORT;
			case JDWP.Tag.VOID:
				return RuntimeType.VOID;
			case JDWP.Tag.BOOLEAN:
				return RuntimeType.BOOLEAN;
			case JDWP.Tag.STRING:
				return RuntimeType.STRING;
			case JDWP.Tag.THREAD:
				return RuntimeType.THREAD;
			case JDWP.Tag.THREAD_GROUP:
				return RuntimeType.THREAD_GROUP;
			case JDWP.Tag.CLASS_LOADER:
				return RuntimeType.CLASS_LOADER;
			case JDWP.Tag.CLASS_OBJECT:
				return RuntimeType.CLASS_OBJECT;
			default:
				throw new SmaliDebuggerException("Unexpected value: " + tag);
		}
	}
}

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