This happens when testing the next version of llvm: https://bugs.chromium.org/p/chromium/issues/detail?id=800984

In the host sdk, dev-util/ragel build fails with new errors from [-Wc++11-narrowing]:

common.cpp:37:70: error: constant expression evaluates to 18446744073709551615 which cannot be narrowed to type 'long long' [-Wc++11-narrowing]
        { "unsigned", "long",  "ulong",   false,  true,  false,  0,         ULONG_MAX,  sizeof(unsigned long) }
                                                                            ^~~~~~~~~
/usr/lib64/clang/6.0.0/include/limits.h:73:19: note: expanded from macro 'ULONG_MAX'
#define ULONG_MAX (__LONG_MAX__ *2UL+1UL)
                  ^~~~~~~~~~~~~~~~~~~~~~~
common.cpp:37:70: note: insert an explicit cast to silence this issue
        { "unsigned", "long",  "ulong",   false,  true,  false,  0,         ULONG_MAX,  sizeof(unsigned long) }
                                                                            ^~~~~~~~~
                                                                            static_cast<long long>( )
/usr/lib64/clang/6.0.0/include/limits.h:73:19: note: expanded from macro 'ULONG_MAX'
#define ULONG_MAX (__LONG_MAX__ *2UL+1UL)
                  ^~~~~~~~~~~~~~~~~~~~~~~
common.cpp:117:64: error: constant expression evaluates to 18446744073709551615 which cannot be narrowed to type 'long long' [-Wc++11-narrowing]
        { "ulong",   0,  "ulong",   false,  true,  false,  0,         ULONG_MAX,   8 }
                                                                      ^~~~~~~~~
/usr/lib64/clang/6.0.0/include/limits.h:73:19: note: expanded from macro 'ULONG_MAX'
#define ULONG_MAX (__LONG_MAX__ *2UL+1UL)
                  ^~~~~~~~~~~~~~~~~~~~~~~
common.cpp:117:64: note: insert an explicit cast to silence this issue
        { "ulong",   0,  "ulong",   false,  true,  false,  0,         ULONG_MAX,   8 }
                                                                      ^~~~~~~~~
                                                                      static_cast<long long>( )
/usr/lib64/clang/6.0.0/include/limits.h:73:19: note: expanded from macro 'ULONG_MAX'
#define ULONG_MAX (__LONG_MAX__ *2UL+1UL)
                  ^~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.