Bug 1823379 - wasm: Test case. r=jseward

Depends on D174766

Differential Revision: https://phabricator.services.mozilla.com/D174767

js/src/jit-test/tests/wasm/exceptions/unreachable.js

@@ -0,0 +1,33 @@
+// |jit-test| test-also=--wasm-function-references --wasm-gc --wasm-compiler=optimizing; test-also=--wasm-function-references --wasm-gc --wasm-compiler=baseline;
+
+wasmFailValidateText(`(module
+	(tag)
+	(tag)
+	(func (export "test")
+		try
+			throw 0
+		catch 0
+			unreachable
+		catch 1
+			i32.add
+		end
+	)
+)`, /popping/);
+
+if (wasmGcEnabled()) {
+	wasmFailValidateText(`(module
+		(tag)
+		(tag)
+		(func (export "test") (param (ref extern))
+			(local $nonNullable (ref extern))
+			try
+				throw 0
+			catch 0
+				(local.set $nonNullable (local.get 0))
+			catch 1
+				(local.get $nonNullable)
+				drop
+			end
+		)
+	)`, /unset local/);
+}