Hello all, I see *literally thousands* of these warnings (in yesterday's and) today's bootstraps: {{{ HC [stage 1] libraries/base/dist-install/build/GHC/Base.o *** Core Lint warnings : in result of Desugar (after optimization) *** {-# LINE 261 "libraries/base/GHC/Base.lhs #-}: Warning: [RHS of $c>>_arr :: forall r_agf a_adQ b_adR. (r_agf -> a_adQ) -> (r_agf -> b_adR) -> r_agf -> b_adR] INLINE binder is (non-rule) loop breaker: $c>>_arr {-# LINE 632 "libraries/base/GHC/Base.lhs #-}: Warning: [RHS of $c>>_apH :: forall a_adQ b_adR. GHC.Types.IO a_adQ -> GHC.Types.IO b_adR -> GHC.Types.IO b_adR] INLINE binder is (non-rule) loop breaker: $c>>_apH }}} I don't know when this started and it does not seem to lead to a damaged GHC, but nevertheless it does not look very trustworthy... Any idea what this could be and where it came from? Cheers, Gabor