id summary reporter owner description type status priority milestone component version resolution keywords cc port 59467 ghc @8.6.5_1: Built ghc not working on Catalina abusse essandess "Compiled on macOS 10.15 with system compiler (Xcode 11.1) completes bootstrap, but the compiler later fails to run simple programs with a memory-related error: {{{ ghc: mmap 131072 bytes at 0x0: Operation not permitted ghc: Try specifying an address with +RTS -xm -RTS ghc: internal error: m32_allocator_init: Failed to map (GHC version 8.6.5 for x86_64_apple_darwin) }}} Homebrew seems to have the same issue: https://github.com/Homebrew/homebrew-core/pull/44802 The issue is discussed upstream: https://gitlab.haskell.org/ghc/ghc/issues/17353 However, it seems to be an issue during building and not in the ghc code." defect closed Normal ports 2.6.2 fixed catalina cjones051073 ghc