Lots of validate failures today (x86-64/Linux): Unexpected failures: indexed-types/should_compile Gentle [exit code non-0] (normal) perf/compiler T5030 [stat not good enough] (normal) polykinds T6068 [bad stderr] (ghci) rename/should_fail rnfail055 [stderr mismatch] (normal) typecheck/should_compile tc235 [exit code non-0] (normal) typecheck/should_fail T5684 [stderr mismatch] (normal) Many of them seem to be of this kind: + Illegal instance declaration for `HasSingleton + (Maybe ak) (Maybe a) mp' + Multiple uses of this instance may be inconsistent + with the functional dependencies of the class. + In the instance declaration for `HasSingleton (Maybe a) mp' Anyone know why this is? Cheers, Simon