RE: readFile close behaviour
If it was semiclosed, the physical handle could be closed immediately. I think my statement was too weak. It shouldn't matter whether the handle is open or semi-closed: if there are no references left to it it should be closed. And how do you define what it means to have no references left? This depends on having some well-defined operational semantics for Haskell, which we don't have. The upshot is that while GHC might notice that you have dropped a Handle, another implementation which doesn't do black holing, stack stubbing, strictness analysis, GC evaluation of selector thunks or any of the other tricks we do to avoid space leaks might not notice. Your program can still run out of file descriptors when compiled with one compiler but not with another, regardless of the finalization policy. Furthermore, as Alastair points out, while GHC will schedule the finalizer to run, there's no guarantee that it will run in a timely fashion. This is something we could hack our way around, I suppose, but it's ugly. IMHO if you want to do any kind of heavyweight I/O in Haskell, you shouldn't use lazy file reading. Cheers, Simon ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
RE: compiler bug
when i loaded my ass2 GameFrontEnd.hs into ghci, this came up Please report it as a compiler bug to [EMAIL PROTECTED], or http://sourceforge.net/projects/ghc/ ghc-5.00.2: panic! (the `impossible' happened, GHC version 5.00.2): loadObj: failed Hi there, and thanks for the report. Could you please try again with GHC 5.02, and if the problem persists then send us more details: the complete command line used to invoke GHCi, the output produced when the -v flag is added, and the source/object files you were trying to lead at the time. Cheers, Simon ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: GHC 5.02 Win32
Yes, non-interactive uses of the Win32 library appear to be in a non-working state (at least with my copy of ghc-5.02, don't know if there's been any stealth updates to the installer binary.) As a stop-gap measure, replace ghc-5.02's libHSwin32.a (after having saved it away) with the one contained in http://www.galconn.com/~sof/HSwin32.zip and try again. Hopefully this can be fixed in the installer proper.. (The cause of it all is that libHSwin32.a lacks a pair of _stub.c files which contains the code that takes care of the window/dialogue callbacks into Haskell). hth --sigbjorn - Original Message - From: Mike Thomas [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, October 07, 2001 19:58 Subject: GHC 5.02 Win32 Hi there. Congratulations on 5.02 - a lot of work in that one for you. The web site Win32 example program doesn't link due to an undefined reference to Win32Window_dfQU which is defined in HSwin321.o. Although that file is listed in the package.conf entry for win32, it (and it's presumed companion HSwin322.o) does not appear in the verbose output from ghc's call to ld (an extract is below) when -package win32 is passed to ghc. The win32 libraries are there, however. Cheers Mike Thomas. . e:\ghc\ghc-5.02\gcc-lib\ld.exe -Bdynamic -o hello.exe -u _Addr_Azh_static_info -u _PrelBase_Izh_sta tic_info -u _PrelBase_Czh_static_info -u _PrelFloat_Fzh_static_info -u _PrelFloat_Dzh_static_info -u _PrelPtr_Ptr_static_info -u _PrelWord_Wzh_static_info -u _PrelInt_I8zh_static_info -u _PrelInt_I16z h_static_info -u _PrelInt_I32zh_static_info -u _PrelInt_I64zh_static_info -u _PrelWord_W8zh_static_i nfo -u _PrelWord_W16zh_static_info -u _PrelWord_W32zh_static_info -u _PrelWord_W64zh_static_info -u _PrelStable_StablePtr_static_info -u _PrelBase_Izh_con_info -u _PrelBase_Czh_con_info -u _PrelFloat_ Fzh_con_info -u _PrelFloat_Dzh_con_info -u _PrelPtr_Ptr_con_info -u _PrelStable_StablePtr_con_info - u _PrelBase_False_closure -u _PrelBase_True_closure -u _PrelPack_unpackCString_closure -u _PrelIOBas e_stackOverflow_closure -u _PrelIOBase_heapOverflow_closure -u _PrelIOBase_NonTermination_closure -u _PrelIOBase_BlockedOnDeadMVar_closure -u _PrelWeak_runFinalizzerBatch_closure -u ___stginit_Prelude -u _PrelMain_mainIO_closure -u ___stginit_PrelMain e:/ghc/ghc-5.02/gcc-lib/crt2.o -Le:/ghc/ghc-5.02 -Le:/ghc/ghc-5.02/gcc-lib hello.o -lHSwin32 -luser32 -lgdi32 -lwinmm -lkernel32 -ladvapi32 -lHSlang -lHSlang_cbits -lHSstd -lHSstd_cbits -lwsock32 -lmsvcrt -lHSrts -lm -lwin mm -lwsock32 -lgmp -lmingw 32 -lgcc -lmoldname -lmsvcrt -luser32 -lkernel32 -ladvapi32 -lshell32 -lming w32 -lgcc -lmoldname -lm svcrt e:/ghc/ghc-5.02/libHSwin32.a(Win32Window__106.o)(.text+0x2ba)://c/tmp/ghc169 2.hc: undefined referenc e to `Win32Window_dfQU' .. ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
