Changes imported from Abseil "staging" branch:

  - e4999febdfea4d392284bfbc9dce9520b26d98cb Remove an erronous __attribute__((...)) tag. by Abseil Team <absl-team@google.com>
  - 61db01b3eaad3563aa2f97d41799ef1339d57c04 Remove the default parameter value from overridden overfl... by Abseil Team <absl-team@google.com>
  - e7dc1ee6bb523b2173915e1978f7e3831f5484f6 Fix the include guards for exception_safety_testing.h by Jon Cohen <cohenjon@google.com>

GitOrigin-RevId: e4999febdfea4d392284bfbc9dce9520b26d98cb
Change-Id: I7837e125138a1e623d9b6394c0ea5f624b904ea2

1 files changed, 1 insertions, 1 deletions

diff --git a/absl/strings/internal/ostringstream.h b/absl/strings/internal/ostringstream.h
index 017632a9292e..013146599d3d 100644
--- a/absl/strings/internal/ostringstream.h
+++ b/absl/strings/internal/ostringstream.h
@@ -75,7 +75,7 @@ class OStringStream : private std::basic_streambuf<char>, public std::ostream {
  private:
   using Buf = std::basic_streambuf<char>;
 
-  Buf::int_type overflow(int c = Buf::traits_type::eof()) override {
+  Buf::int_type overflow(int c) override {
     assert(s_);
     if (!Buf::traits_type::eq_int_type(c, Buf::traits_type::eof()))
       s_->push_back(static_cast<char>(c));