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-rw-r--r--absl/time/internal/test_util.cc3
-rw-r--r--absl/time/time.h3
2 files changed, 4 insertions, 2 deletions
diff --git a/absl/time/internal/test_util.cc b/absl/time/internal/test_util.cc
index 59166a7c82dd..fbddbb733698 100644
--- a/absl/time/internal/test_util.cc
+++ b/absl/time/internal/test_util.cc
@@ -116,7 +116,10 @@ std::unique_ptr<cctz::ZoneInfoSource> TestFactory(
 
 }  // namespace
 
+#if !defined(__MINGW32__)
+// MinGW does not support the weak symbol extension mechanism.
 ZoneInfoSourceFactory zone_info_source_factory = TestFactory;
+#endif
 
 }  // namespace cctz_extension
 }  // namespace time_internal
diff --git a/absl/time/time.h b/absl/time/time.h
index 46ac26b3c0d2..be0648134efd 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -1412,8 +1412,7 @@ constexpr Duration FromInt64(int64_t v, std::ratio<3600>) {
 // IsValidRep64<T>(0) is true if the expression `int64_t{std::declval<T>()}` is
 // valid. That is, if a T can be assigned to an int64_t without narrowing.
 template <typename T>
-constexpr auto IsValidRep64(int)
-    -> decltype(int64_t{std::declval<T>()}, bool()) {
+constexpr auto IsValidRep64(int) -> decltype(int64_t{std::declval<T>()} == 0) {
   return true;
 }
 template <typename T>