#9991: runghc shows the value produced by main when its type is a non-() Show instance -------------------------------------+------------------------------------- Reporter: shachaf | Owner: Type: task | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.8.4 Resolution: duplicate | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: #9086 | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * status: new => closed * resolution: => duplicate * related: => #9086 Comment: I found the commit that fixed this: 55e7ab1210975e6276f3cab3ac0e1f35bcd772f0 {{{ Author: Gintautas Miliauskas <> Date: Sun Jun 8 11:49:29 2014 +0000 Do not print the result of 'main' after invoking ':main' (fixes #9086). }}} Since it has a test already, we don't have to do anything here. Berdes: please have a look at that commit and [wiki:Building/RunningTests] to see how the testsuite works. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9991#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler