warning: Linking globals named 'foo': symbol multiply defined!
-error: failed to load bc of "lto-duplicate-symbols2.lto_duplicate_symbols2.3a1fbbbh-cgu.0.rcgu.o":
+error: failed to load bc of "lto-duplicate-symbols2.lto_duplicate_symbols2.693a75b4-cgu.0.rcgu.o":
error: aborting due to previous error; 1 warning emitted