Marshall Clow found this memory problem in strstream using -fsanitize=address on...

llvm-svn: 177452

diff --git a/libcxx/src/strstream.cpp b/libcxx/src/strstream.cpp
index 8cd19e6..518422b 100644 (file)
--- a/libcxx/src/strstream.cpp
+++ b/libcxx/src/strstream.cpp
@@ -158,6 +158,8 @@ strstreambuf::overflow(int_type __c)
             return int_type(EOF);
         streamsize old_size = (epptr() ? epptr() : egptr()) - eback();
         streamsize new_size = max<streamsize>(__alsize_, 2*old_size);
+        if (new_size == 0)
+            new_size = __default_alsize;
         char* buf = nullptr;
         if (__palloc_)
             buf = static_cast<char*>(__palloc_(static_cast<size_t>(new_size)));