It turns out D153336 needs a new include. This should fix the broken
LLVM CI runners.
#ifndef _LIBCPP_HAS_NO_LOCALIZATION
# include <locale>
+# include <sstream>
#endif
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view
thread locale
thread new
thread ratio
+thread sstream
thread stdexcept
thread string
thread string_view