diff --git a/Source/JavaScriptCore/runtime/Error.cpp b/Source/JavaScriptCore/runtime/Error.cpp
index b5514f770a28..1cc8c72a85ad 100644
--- a/Source/JavaScriptCore/runtime/Error.cpp
+++ b/Source/JavaScriptCore/runtime/Error.cpp
@@ -262,6 +262,9 @@ JSObject* addErrorInfo(VM& vm, JSObject* error, int line, const SourceCode& sour
         if (!sourceURL.isEmpty()) {
             errorInstance->setSourceURL(sourceURL);
         }
+
+        // materializeErrorInfoIfNeeded() formats the stack through the host, which reads this.
+        errorInstance->setHasParseLocation();
 #endif
 
         errorInstance->materializeErrorInfoIfNeeded(vm);
diff --git a/Source/JavaScriptCore/runtime/ErrorInstance.cpp b/Source/JavaScriptCore/runtime/ErrorInstance.cpp
index 8cb916db573d..6f4afd6ef084 100644
--- a/Source/JavaScriptCore/runtime/ErrorInstance.cpp
+++ b/Source/JavaScriptCore/runtime/ErrorInstance.cpp
@@ -48,6 +48,9 @@ ErrorInstance::ErrorInstance(VM& vm, Structure* structure, ErrorType errorType)
 #if ENABLE(WEBASSEMBLY)
     , m_catchableFromWasm(true)
 #endif // ENABLE(WEBASSEMBLY)
+#if USE(BUN_JSC_ADDITIONS)
+    , m_hasParseLocation(false)
+#endif
 {
 }
 
diff --git a/Source/JavaScriptCore/runtime/ErrorInstance.h b/Source/JavaScriptCore/runtime/ErrorInstance.h
index c28ce88fd791..05d1bc01ac86 100644
--- a/Source/JavaScriptCore/runtime/ErrorInstance.h
+++ b/Source/JavaScriptCore/runtime/ErrorInstance.h
@@ -116,6 +116,12 @@ class ErrorInstance : public JSNonFinalObject {
     void setStackFrames(VM& vm, WTF::Vector<JSC::StackFrame>&& stackFrames);
     bool hasMaterializedErrorInfo() const { return m_errorInfoMaterialized; }
 
+    // Whether line()/sourceURL() were recorded by addErrorInfo() for a source the parser rejected, as
+    // opposed to copied from another error (structured clone) or derived from the stack frames. Unlike
+    // isParseError(), this is not set for parse errors that record no location (eval code), and it is
+    // set before the stack is materialized, so the host's stack formatter can rely on it.
+    bool hasParseLocation() const { return m_hasParseLocation; }
+    void setHasParseLocation() { m_hasParseLocation = true; }
 #endif
 
     JS_EXPORT_PRIVATE String sanitizedToString(JSGlobalObject*);
@@ -172,6 +178,9 @@ class ErrorInstance : public JSNonFinalObject {
 #if ENABLE(WEBASSEMBLY)
     bool m_catchableFromWasm : 1;
 #endif
+#if USE(BUN_JSC_ADDITIONS)
+    bool m_hasParseLocation : 1;
+#endif
 };
 
 String appendSourceToErrorMessage(CodeBlock*, BytecodeIndex, const String&, RuntimeType, ErrorInstance::SourceAppender);