diff --git a/CMake/README.md b/CMake/README.md
index 404d248e3..268fd65d8 100644
--- a/CMake/README.md
+++ b/CMake/README.md
@@ -1,4 +1,3 @@
-
 ## Abseil CMake build instructions
 
 
@@ -79,8 +78,3 @@ As of this writing, that pull request requires -DBUILD_TESTING=OFF as it doesn't
       absl::synchronization
       absl::time
       absl::utility
-
-
-
-
-
diff --git a/absl/base/CMakeLists.txt b/absl/base/CMakeLists.txt
index 9d2de55fe..4b7b53a7b 100644
--- a/absl/base/CMakeLists.txt
+++ b/absl/base/CMakeLists.txt
@@ -62,7 +62,6 @@ list(APPEND BASE_INTERNAL_HEADERS
 # absl_base main library
 list(APPEND BASE_SRC
   "internal/cycleclock.cc"
-  "internal/exception_safety_testing.cc"
   "internal/raw_logging.cc"
   "internal/spinlock.cc"
   "internal/sysinfo.cc"
@@ -117,6 +116,28 @@ absl_library(
     throw_delegate
 )
 
+if(BUILD_TESTING)
+  # exception-safety testing library
+  set(EXCEPTION_SAFETY_TESTING_SRC "internal/exception_safety_testing.cc")
+  set(EXCEPTION_SAFETY_TESTING_PUBLIC_LIBRARIES
+    ${ABSL_TEST_COMMON_LIBRARIES}
+    absl::base
+    absl::memory
+    absl::meta
+    absl::strings
+    absl::types
+  )
+
+absl_library(
+  TARGET
+    absl_base_internal_exception_safety_testing
+  SOURCES
+    ${EXCEPTION_SAFETY_TESTING_SRC}
+  PUBLIC_LIBRARIES
+    ${EXCEPTION_SAFETY_TESTING_PUBLIC_LIBRARIES}
+)
+endif()
+
 
 # dynamic_annotations library
 set(DYNAMIC_ANNOTATIONS_SRC "dynamic_annotations.cc")
diff --git a/absl/numeric/int128.cc b/absl/numeric/int128.cc
index de1b997ad..b32d8095f 100644
--- a/absl/numeric/int128.cc
+++ b/absl/numeric/int128.cc
@@ -104,11 +104,15 @@ void DivModImpl(uint128 dividend, uint128 divisor, uint128* quotient_ret,
 }
 
 template <typename T>
-uint128 Initialize128FromFloat(T v) {
+uint128 MakeUint128FromFloat(T v) {
+  static_assert(std::is_floating_point<T>::value, "");
+
   // Rounding behavior is towards zero, same as for built-in types.
 
   // Undefined behavior if v is NaN or cannot fit into uint128.
-  assert(!std::isnan(v) && v > -1 && v < std::ldexp(static_cast<T>(1), 128));
+  assert(std::isfinite(v) && v > -1 &&
+         (std::numeric_limits<T>::max_exponent <= 128 ||
+          v < std::ldexp(static_cast<T>(1), 128)));
 
   if (v >= std::ldexp(static_cast<T>(1), 64)) {
     uint64_t hi = static_cast<uint64_t>(std::ldexp(v, -64));
@@ -120,9 +124,9 @@ uint128 Initialize128FromFloat(T v) {
 }
 }  // namespace
 
-uint128::uint128(float v) : uint128(Initialize128FromFloat(v)) {}
-uint128::uint128(double v) : uint128(Initialize128FromFloat(v)) {}
-uint128::uint128(long double v) : uint128(Initialize128FromFloat(v)) {}
+uint128::uint128(float v) : uint128(MakeUint128FromFloat(v)) {}
+uint128::uint128(double v) : uint128(MakeUint128FromFloat(v)) {}
+uint128::uint128(long double v) : uint128(MakeUint128FromFloat(v)) {}
 
 uint128& uint128::operator/=(uint128 other) {
   uint128 quotient = 0;
diff --git a/absl/synchronization/mutex.h b/absl/synchronization/mutex.h
index 374cf57d2..9301222e0 100644
--- a/absl/synchronization/mutex.h
+++ b/absl/synchronization/mutex.h
@@ -233,8 +233,8 @@ class LOCKABLE Mutex {
   //
   // Aliases for `Mutex::Lock()`, `Mutex::Unlock()`, and `Mutex::TryLock()`.
   //
-  // Use the `Writer*()` versions of these method names when using complementary
-  // `Reader*()` methods to distingish simple exclusive `Mutex` usage (`Lock()`,
+  // These methods may be used (along with the complementary `Reader*()`
+  // methods) to distingish simple exclusive `Mutex` usage (`Lock()`,
   // etc.) from reader/writer lock usage.
   void WriterLock() EXCLUSIVE_LOCK_FUNCTION() { this->Lock(); }
 
diff --git a/absl/time/CMakeLists.txt b/absl/time/CMakeLists.txt
index 5c317fb01..a35617895 100644
--- a/absl/time/CMakeLists.txt
+++ b/absl/time/CMakeLists.txt
@@ -75,4 +75,3 @@ absl_test(
     ${TIME_TEST_PUBLIC_LIBRARIES}
 )
 
-
diff --git a/absl/types/CMakeLists.txt b/absl/types/CMakeLists.txt
index b2d95b48f..fd71f38b8 100644
--- a/absl/types/CMakeLists.txt
+++ b/absl/types/CMakeLists.txt
@@ -130,7 +130,7 @@ absl_test(
 
 # test any_exception_safety_test
 set(ANY_EXCEPTION_SAFETY_TEST_SRC "any_exception_safety_test.cc")
-set(ANY_EXCEPTION_SAFETY_TEST_PUBLIC_LIBRARIES absl::any absl::base)
+set(ANY_EXCEPTION_SAFETY_TEST_PUBLIC_LIBRARIES absl::any absl::base absl::base_internal_exception_safety_testing)
 
 absl_test(
   TARGET
diff --git a/absl/utility/CMakeLists.txt b/absl/utility/CMakeLists.txt
index fe8b32b9f..df21b85b3 100644
--- a/absl/utility/CMakeLists.txt
+++ b/absl/utility/CMakeLists.txt
@@ -43,6 +43,3 @@ absl_test(
   PUBLIC_LIBRARIES
     ${UTILITY_TEST_PUBLIC_LIBRARIES}
 )
-
-
-