Currently injected-sources-native.test fails with "Expected<T> value was in success state.
(Note: Expected<T> values in success mode must still be checked prior to being destroyed)"
when llvm is compiled with LLVM_ENABLE_ABI_BREAKING_CHECKS in Release.
The problem is that getStringForID returns Expected<StringRef> and Expected value must always
be checked, even if it is in success state. Checking with assert only helps in Debug and is wrong.