Matthew Dempsky: Same as stdexcept.cpp in libc++abi: we've already computed 'len strlen(msg)', so we can use memcpy() instead of strcpy().

llvm-svn: 185274
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 27841fd803ca0b8c81dcacccddf879b0dafd7f66
diff --git a/src/stdexcept.cpp b/src/stdexcept.cpp
index 0c4e832..8d25f3e 100644
--- a/src/stdexcept.cpp
+++ b/src/stdexcept.cpp
@@ -61,7 +61,7 @@
     c[0] = c[1] = len;
     str_ += offset;
     count() = 0;
-    std::strcpy(const_cast<char*>(c_str()), msg);
+    std::memcpy(const_cast<char*>(c_str()), msg, len + 1);
 }
 
 inline