1 files changed, 13 insertions, 3 deletions
diff --git a/src/third_party/abseil-cpp-master/abseil-cpp/absl/strings/charconv_test.cc b/src/third_party/abseil-cpp-master/abseil-cpp/absl/strings/charconv_test.cc
index d07537eb590..b83de5a0ba2 100644
--- a/src/third_party/abseil-cpp-master/abseil-cpp/absl/strings/charconv_test.cc
+++ b/src/third_party/abseil-cpp-master/abseil-cpp/absl/strings/charconv_test.cc
@@ -4,7 +4,7 @@
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
-//      http://www.apache.org/licenses/LICENSE-2.0
+//      https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ -279,7 +279,8 @@ void TestHalfwayValue(const std::string& mantissa, int exponent,
   absl::from_chars(low_rep.data(), low_rep.data() + low_rep.size(), actual_low);
   EXPECT_EQ(expected_low, actual_low);
 
-  std::string high_rep = absl::StrCat(mantissa, std::string(1000, '0'), "1e", exponent);
+  std::string high_rep =
+      absl::StrCat(mantissa, std::string(1000, '0'), "1e", exponent);
   FloatType actual_high = 0;
   absl::from_chars(high_rep.data(), high_rep.data() + high_rep.size(),
                    actual_high);
@@ -510,6 +511,13 @@ TEST(FromChars, Overflow) {
   EXPECT_EQ(f, std::numeric_limits<float>::max());
 }
 
+TEST(FromChars, RegressionTestsFromFuzzer) {
+  absl::string_view src = "0x21900000p00000000099";
+  float f;
+  auto result = absl::from_chars(src.data(), src.data() + src.size(), f);
+  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
+}
+
 TEST(FromChars, ReturnValuePtr) {
   // Check that `ptr` points one past the number scanned, even if that number
   // is not representable.
@@ -645,7 +653,9 @@ TEST(FromChars, NaNFloats) {
                      negative_from_chars_float);
     EXPECT_TRUE(std::signbit(negative_from_chars_float));
     EXPECT_FALSE(Identical(negative_from_chars_float, from_chars_float));
-    from_chars_float = std::copysign(from_chars_float, -1.0);
+    // Use the (float, float) overload of std::copysign to prevent narrowing;
+    // see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98251.
+    from_chars_float = std::copysign(from_chars_float, -1.0f);
     EXPECT_TRUE(Identical(negative_from_chars_float, from_chars_float));
   }
 }