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diff --git a/src/bun.js/bindings/webcore/ExceptionDetails.h b/src/bun.js/bindings/webcore/ExceptionDetails.h
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+++ b/src/bun.js/bindings/webcore/ExceptionDetails.h
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+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+
+struct ExceptionDetails {
+    enum class Type : uint8_t {
+        Script,
+        InvalidTargetFrame,
+        AppBoundDomain,
+    };
+
+    String message;
+    int lineNumber { 0 };
+    int columnNumber { 0 };
+    Type type { Type::Script };
+
+    // This bizarre explicit initialization of String is because older compilers (like on High Sierra)
+    // don't properly handle partial initialization lists unless every struct member has an explicit default value.
+    // Once we stop building on those platforms we can remove this.
+    String sourceURL {};
+};
+
+} // namespace WebCore
+
+namespace WTF {
+template<> struct EnumTraits<WebCore::ExceptionDetails::Type> {
+    using values = EnumValues<
+        WebCore::ExceptionDetails::Type,
+        WebCore::ExceptionDetails::Type::Script,
+        WebCore::ExceptionDetails::Type::InvalidTargetFrame,
+        WebCore::ExceptionDetails::Type::AppBoundDomain>;
+};
+}