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deps/v8/test/mjsunit/regress/wasm/global-initializer-error-offset.js

@@ -0,0 +1,21 @@
+// Copyright 2023 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
+
+let builder = new WasmModuleBuilder();
+
+// One global that's perfectly OK.
+builder.addGlobal(kWasmI32, true, false, [kExprI32Const, 0]);
+// One global that's invalid.
+builder.addGlobal(kWasmI32, true, false, [kExprUnreachable]);
+
+// The error is the second-to-last byte.
+let module_bytes = builder.toBuffer();
+assertEquals(kExprUnreachable, module_bytes[18]);
+assertEquals(kExprEnd, module_bytes[19]);
+assertEquals(20, module_bytes.byteLength);
+assertThrows(() => builder.instantiate(), WebAssembly.CompileError,
+             "WebAssembly.Module(): opcode unreachable is not allowed in " +
+             "constant expressions @+18");