Fix a typo

Author: grynspan

stdlib/public/core/KeyPath.swift

@@ -3896,12 +3896,7 @@ internal func _instantiateKeyPathBuffer(
 @_silgen_name("swift_keyPath_copySymbolName")
 fileprivate func keyPath_copySymbolName(
   _: UnsafeRawPointer
-) -> UnsafePointer<CChar>?
-
-@_silgen_name("swift_keyPath_freeSymbolName")
-fileprivate func keyPath_freeSymbolName(
-  _: UnsafePointer<CChar>?
-) -> Void
+) -> UnsafeMutablePointer<CChar>?
 
 @_silgen_name("swift_keyPathSourceString")
 fileprivate func demangle(
@@ -3917,9 +3912,9 @@ fileprivate func dynamicLibraryAddress<Base, Leaf>(
   let pointer = unsafeBitCast(getter, to: UnsafeRawPointer.self)
   if let cString = keyPath_copySymbolName(UnsafeRawPointer(pointer)) {
     defer {
-      keyPath_freeSymbolName(cString)
+      cString.deallocate()
     }
-    if let demangled = demangle(name: cString)
+    if let demangled = demangle(name: .init(cString))
       .map({ pointer in
         defer {
           pointer.deallocate()

stdlib/public/runtime/ReflectionMirror.cpp

@@ -1115,16 +1115,13 @@ id swift_reflectionMirror_quickLookObject(OpaqueValue *value, const Metadata *T)
 #endif
 
 SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_INTERNAL
-const char *swift_keyPath_copySymbolName(void *address) {
-  if (auto info = SymbolInfo::lookup(address) && info->getSymbolName()) {
-    return strdup(info->getSymbolName());
+char *swift_keyPath_copySymbolName(void *address) {
+  if (auto info = SymbolInfo::lookup(address)) {
+    if (info->getSymbolName()) {
+      return strdup(info->getSymbolName());
+    }
   }
-  return 0;
-}
-
-SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_INTERNAL
-void swift_keyPath_freeSymbolName(const char *symbolName) {
-  free(const_cast<char *>(symbolName));
+  return nullptr;
 }
 
 SWIFT_CC(swift)