Driver: Attmpt to fix some possibly UB that MSVC doesn't care for.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126513 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index d8c374437b2b3d04a528312fbe8b9388e0154c64..1c396bd0ed5b39385c350f9f00429a89600be408 100644 (file)
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -42,7 +42,7 @@ Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple)
   // Compute the initial Darwin version based on the host.
   bool HadExtra;
   std::string OSName = Triple.getOSName();
-  if (!Driver::GetReleaseVersion(&OSName[6],
+  if (!Driver::GetReleaseVersion(&OSName.c_str()[6],
                                  DarwinVersion[0], DarwinVersion[1],
                                  DarwinVersion[2], HadExtra))
     getDriver().Diag(clang::diag::err_drv_invalid_darwin_version) << OSName;