diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
index c2a653c85..650f171e4 100644
--- a/CMake/AbseilHelpers.cmake
+++ b/CMake/AbseilHelpers.cmake
@@ -54,8 +54,8 @@ function(absl_library)
     PUBLIC ${ABSL_COMMON_INCLUDE_DIRS} ${ABSL_LIB_PUBLIC_INCLUDE_DIRS}
     PRIVATE ${ABSL_LIB_PRIVATE_INCLUDE_DIRS}
   )
-  # Add all Abseil targets to a a folder in the IDE for organization.
-  set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
+# Add all Abseil targets to a a folder in the IDE for organization.
+set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
 
   if(ABSL_LIB_EXPORT_NAME)
     add_library(absl::${ABSL_LIB_EXPORT_NAME} ALIAS ${_NAME})
@@ -99,8 +99,8 @@ function(absl_header_library)
     PUBLIC ${ABSL_COMMON_INCLUDE_DIRS} ${ABSL_HO_LIB_PUBLIC_INCLUDE_DIRS}
     PRIVATE ${ABSL_HO_LIB_PRIVATE_INCLUDE_DIRS}
   )
-  # Add all Abseil targets to a a folder in the IDE for organization.
-  set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
+# Add all Abseil targets to a a folder in the IDE for organization.
+set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
 
   if(ABSL_HO_LIB_EXPORT_NAME)
     add_library(absl::${ABSL_HO_LIB_EXPORT_NAME} ALIAS ${_NAME})
@@ -147,8 +147,8 @@ function(absl_test)
       PUBLIC ${ABSL_COMMON_INCLUDE_DIRS} ${ABSL_TEST_PUBLIC_INCLUDE_DIRS}
       PRIVATE ${GMOCK_INCLUDE_DIRS} ${GTEST_INCLUDE_DIRS}
     )
-    # Add all Abseil targets to a a folder in the IDE for organization.
-    set_property(TARGET ${_NAME}_bin PROPERTY FOLDER ${ABSL_IDE_FOLDER})
+# Add all Abseil targets to a a folder in the IDE for organization.
+set_property(TARGET ${_NAME}_bin PROPERTY FOLDER ${ABSL_IDE_FOLDER})
 
     add_test(${_NAME} ${_NAME}_bin)
   endif(BUILD_TESTING)
diff --git a/absl/base/macros.h b/absl/base/macros.h
index 114a7be13..afa30300b 100644
--- a/absl/base/macros.h
+++ b/absl/base/macros.h
@@ -36,21 +36,20 @@
 
 // ABSL_ARRAYSIZE()
 //
-// Returns the # of elements in an array as a compile-time constant, which can
-// be used in defining new arrays. If you use this macro on a pointer by
+// Returns the number of elements in an array as a compile-time constant, which
+// can be used in defining new arrays. If you use this macro on a pointer by
 // mistake, you will get a compile-time error.
-//
-// Note: this template function declaration is used in defining arraysize.
-// Note that the function doesn't need an implementation, as we only
-// use its type.
+#define ABSL_ARRAYSIZE(array) \
+  (sizeof(::absl::macros_internal::ArraySizeHelper(array)))
+
 namespace absl {
 namespace macros_internal {
+// Note: this internal template function declaration is used by ABSL_ARRAYSIZE.
+// The function doesn't need a definition, as we only use its type.
 template <typename T, size_t N>
 auto ArraySizeHelper(const T (&array)[N]) -> char (&)[N];
 }  // namespace macros_internal
 }  // namespace absl
-#define ABSL_ARRAYSIZE(array) \
-  (sizeof(::absl::macros_internal::ArraySizeHelper(array)))
 
 // kLinkerInitialized
 //
diff --git a/absl/debugging/symbolize_test.cc b/absl/debugging/symbolize_test.cc
index c1090b8dc..5f2af47ee 100644
--- a/absl/debugging/symbolize_test.cc
+++ b/absl/debugging/symbolize_test.cc
@@ -68,7 +68,7 @@ int ABSL_ATTRIBUTE_SECTION_VARIABLE(.text.exit) exit_func() {
   return 0;
 }
 
-int ABSL_ATTRIBUTE_SECTION_VARIABLE(.text) regular_func() {
+int /*ABSL_ATTRIBUTE_SECTION_VARIABLE(.text)*/ regular_func() {
   return 0;
 }
 
@@ -88,7 +88,7 @@ static volatile bool volatile_bool = false;
 // Force the binary to be large enough that a THP .text remap will succeed.
 static constexpr size_t kHpageSize = 1 << 21;
 const char kHpageTextPadding[kHpageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(
-    ".text") = "";
+    .text) = "";
 
 static char try_symbolize_buffer[4096];
 
@@ -236,9 +236,9 @@ TEST(Symbolize, SymbolizeWithDemanglingStackConsumption) {
 const size_t kPageSize = 64 << 10;
 // We place a read-only symbols into the .text section and verify that we can
 // symbolize them and other symbols after remapping them.
-const char kPadding0[kPageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(".text") =
+const char kPadding0[kPageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(.text) =
     "";
-const char kPadding1[kPageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(".text") =
+const char kPadding1[kPageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(.text) =
     "";
 
 static int FilterElfHeader(struct dl_phdr_info *info, size_t size, void *data) {
diff --git a/absl/strings/internal/str_join_internal.h b/absl/strings/internal/str_join_internal.h
index c5fdc287c..a734758c2 100644
--- a/absl/strings/internal/str_join_internal.h
+++ b/absl/strings/internal/str_join_internal.h
@@ -234,17 +234,19 @@ std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
       result_size += it->size();
     }
 
-    STLStringResizeUninitialized(&result, result_size);
+    if (result_size > 0) {
+      STLStringResizeUninitialized(&result, result_size);
 
-    // Joins strings
-    char* result_buf = &*result.begin();
-    memcpy(result_buf, start->data(), start->size());
-    result_buf += start->size();
-    for (Iterator it = start; ++it != end;) {
-      memcpy(result_buf, s.data(), s.size());
-      result_buf += s.size();
-      memcpy(result_buf, it->data(), it->size());
-      result_buf += it->size();
+      // Joins strings
+      char* result_buf = &*result.begin();
+      memcpy(result_buf, start->data(), start->size());
+      result_buf += start->size();
+      for (Iterator it = start; ++it != end;) {
+        memcpy(result_buf, s.data(), s.size());
+        result_buf += s.size();
+        memcpy(result_buf, it->data(), it->size());
+        result_buf += it->size();
+      }
     }
   }
 
diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index 2dfe53b26..f97eab022 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -415,7 +415,6 @@ const char* const kTimeZoneNames[] = {
   "CST6CDT",
   "Canada/Atlantic",
   "Canada/Central",
-  "Canada/East-Saskatchewan",
   "Canada/Eastern",
   "Canada/Mountain",
   "Canada/Newfoundland",
diff --git a/absl/types/span.h b/absl/types/span.h
index 0ca30d1d0..f781353c2 100644
--- a/absl/types/span.h
+++ b/absl/types/span.h
@@ -290,7 +290,8 @@ class Span {
   constexpr Span(T (&a)[N]) noexcept  // NOLINT(runtime/explicit)
       : Span(a, N) {}
 
-  // Explicit reference constructor for a mutable `Span<T>` type
+  // Explicit reference constructor for a mutable `Span<T>` type. Can be
+  // replaced with MakeSpan() to infer the type parameter.
   template <typename V, typename = EnableIfConvertibleFrom<V>,
             typename = EnableIfMutableView<V>>
   explicit Span(V& v) noexcept  // NOLINT(runtime/references)