#11180: A program writing to a read-only stdout should not succeed -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Indeed this is quite unexpected. I believe the relevant code it is `libraries/base/GHC/IO/FD.hs:writeRawBufferPtrNoBlock`. Judging by the code it ought to be throwing an exception. I'm not yet sure why it is not. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11180#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11180: A program writing to a read-only stdout should not succeed -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by thomie): Or don't do any automatic flushing of handles on exit. Teach people to always flush/close handles manually, as they have to do already with other handles but stdout/stderr, as noted in commit message 47f3a578a22ed5942ed44ddc81dfd362060e78b4: {{{ Author: simonmar <unknown> Date: Fri Jan 21 16:02:48 2005 +0000 [project @ 2005-01-21 16:02:47 by simonmar] Don't try to run finalizers at program exit. This turned out to be hard if not impossible to do in general, so now we don't attempt it at all. The Main.main wrapper, previously called runIO and now called runMainIO, flushes stdout and stderr before exiting. This should catch most cases where programs rely on Handles being flushed at program exit, but note that now if you simply drop a Handle in your program, there's no guarantee it'll be flushed on exit. If the punters complain enough, I suppose we could implement a global Handle table and flush them all at exit... I'd rather not do this if possible, though. Better to teach people to close their Handles properly. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11180#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11180: A program writing to a read-only stdout should not succeed -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11836 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by thomie): * related: => #11836 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11180#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler