Added NULL check for getenv in MSYS2

src/config.cc

@@ -28,10 +28,14 @@ Config::Config() {
   }
   
 #ifdef _WIN32
-    terminal.msys2_mingw_path=boost::filesystem::path(std::getenv("WD")).parent_path().parent_path().parent_path();
-    std::string msystem=std::getenv("MSYSTEM");
+    auto env_WD=std::getenv("WD");
+    auto env_MSYSTEM=std::getenv("MSYSTEM");
+    if(env_WD!=NULL && env_MSYSTEM!=NULL) {
+      terminal.msys2_mingw_path=boost::filesystem::path(env_WD).parent_path().parent_path().parent_path();
+      std::string msystem=env_MSYSTEM;
       std::transform(msystem.begin(), msystem.end(), msystem.begin(), ::tolower);
       terminal.msys2_mingw_path/=msystem;
+    }
 #endif
 }
 

src/source_clang.cc

@@ -200,6 +200,7 @@ std::vector<std::string> Source::ClangViewParse::get_compilation_commands() {
     arguments.emplace_back("-I/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1"); //Added for OS X 10.11
 #endif
 #ifdef _WIN32
+    if(!Config::get().terminal.msys2_mingw_path.empty())
       arguments.emplace_back("-I"+(Config::get().terminal.msys2_mingw_path/"lib/clang"/clang_version/"include").string());
 #endif
   }