Hello everyone, The GHC team is very happy to announce the availability of GHC 8.6.3, a bugfix release in the GHC 8.6 series. The source distribution, binary distributions, and documentation for this release are available at https://downloads.haskell.org/~ghc/8.6.3 The 8.6 release fixes several regressions present in 8.6.2 including: - A code generation bug resulting in segmentations faults in some programs (#15892) - Darwin binary distributions are now correctly built against an in-tree GMP (#15404) - Three bugs leading to linker failures on Windows (#15105, #15894, #15934) - A bug leading to programs with deep stacks crashing when run with retainer profiling enabled (#14758) - A bug resulting in potential heap corruption during stable name allocation (#15906) - Plugins are now loaded during GHCi sessions (#15633) As a few of these issues are rather serious users are strongly encouraged to upgrade. See Trac [1] for a full list of issues resolved in this release. Note that this release ships with one significant but long-standing bug (#14251): Calls to functions taking both Float# and Double# may result in incorrect code generation when compiled using the LLVM code generator. This is not a new issue, it has existed as long as the LLVM code generator has existed; however, changes in code generation in 8.6 made it more likely that user code using only lifted types will trigger it. Happy compiling! Cheers, - Ben [1] https://ghc.haskell.org/trac/ghc/query?status=closed&milestone=8.6.3&col=id&col=summary&col=status&col=type&col=priority&col=milestone&col=component&order=priority