#14950: GHC 8.2.2: GHCi duplicates breakpoint range prompt -------------------------------------+------------------------------------- Reporter: lierdakil | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.2.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Other Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- I think breakpoint range is being printed twice, once as part of prompt, and the second time by itself. To reproduce, create `test.hs` file like this: {{{#!hs module Test where test :: IO () test = putStrLn "Hello, World!" }}} Then run the following GHCi session: {{{ $ ghci test.hs GHCi, version 8.2.2: http://www.haskell.org/ghc/ :? for help [1 of 1] Compiling Test ( test.hs, interpreted ) Ok, one module loaded. *Test> :break test Breakpoint 0 activated at test.hs:4:8-31 *Test> :trace test Stopped in Test.test, test.hs:4:8-31 _result :: IO () = _ [test.hs:4:8-31] [test.hs:4:8-31] *Test> :set prompt "" [test.hs:4:8-31] }}} Notice `[test.hs:4:8-31]` is printed twice, and is even printed when prompt is set to `""`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14950 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler