Add printing but copy to see where it crashes

Author: ldionne

libcxx/include/__locale_dir/locale_base_api/bsd_locale_defaults.h

@@ -27,7 +27,7 @@
 #define __libcpp_mbrtowc_l(pwc, s, n, ps, l) mbrtowc_l(pwc, s, n, ps, l)
 #define __libcpp_mbtowc_l(pwc, pmb, max, l) mbtowc_l(pwc, pmb, max, l)
 #define __libcpp_mbrlen_l(s, n, ps, l) mbrlen_l(s, n, ps, l)
-inline _LIBCPP_HIDE_FROM_ABI lconv* __libcpp_localeconv_l(locale_t& __loc) {
+inline _LIBCPP_HIDE_FROM_ABI lconv* __libcpp_localeconv_l(locale_t __loc) {
     return localeconv_l(__loc);
 }
 #define __libcpp_mbsrtowcs_l(dest, src, len, ps, l) mbsrtowcs_l(dest, src, len, ps, l)

libcxx/src/support/win32/locale_win32.cpp

@@ -40,6 +40,8 @@ lconv* localeconv_l(locale_t& loc) {
   lconv* lc = localeconv();
   if (!lc)
     return lc;
+
+  std::fprintf(stderr, "Calling __store_lconv in locale_win32.cpp\n");
   return loc.__store_lconv(lc);
 }
 size_t mbrlen_l(const char* __restrict s, size_t n, mbstate_t* __restrict ps, locale_t loc) {