Found non-frame during stack squeezing...
When I build CVS HEAD with RTS debugging I sometimes get, at exit time:
ghc-5.03: fatal error: Found non-frame during stack squeezing at 0x504797a0 (prev
frame was 0x504797a0)
and sometimes segmentation faults:
#0 0x87da233 in threadSqueezeStack (tso=0x500ba000) at GC.c:3820
3820switch (get_itbl(frame)-type) {
(gdb) bt
#0 0x87da233 in threadSqueezeStack (tso=0x500ba000) at GC.c:3820
#1 0x87da4ff in threadPaused (tso=0x500ba000) at GC.c:4054
#2 0x87e2777 in suspendThread (reg=0x8896770, concCall=rtsFalse) at Schedule.c:1520
#3 0x87a5661 in s5rx_fast1 ()
#4 0x87e6f60 in stg_catch_frame_info ()
#5 0x4c58308 in ?? ()
Cannot access memory at address 0x887fe0be.
(gdb) print frame
$1 = (StgUpdateFrame *) 0x1
and generally behaviour which suggests there isn't an update frame where
it is expecting one - and indeed tso-su doesn't look like it's pointing
at an update frame.
Here s5rx_fast1 is a bit of TopHandler that calls shutdownHaskellAndExit.
Anyone know what's up with it?
Matt
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Re: User defined Ix instances potentially unsafe
Matt Harden wrote: blah, blah, blah, bug in the Library Report, blah, blah... OK, so I failed to read the Library Report. It clearly states: An implementation is entitled to assume the following laws about these operations: range (l,u) !! index (l,u) i == i -- when i is in range inRange (l,u) i == i `elem` range (l,u) So my bug is only in my mind. Sorry for bothering everyone. Regards, Matt ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
User defined Ix instances potentially unsafe
Sorry if this has been reported before. I shouldn't be able to crash ghc or hugs without using any unsafe features, right? Well, here 'tis: module CrashArray where import Array import Ix newtype CrashIx = CrashIx Int deriving (Ord, Eq, Show) instance Enum CrashIx where toEnum x = (CrashIx x) fromEnum (CrashIx x) = x instance Ix CrashIx where inRange (_,_) _ = True index (_,_) (CrashIx x) = x range (x,y) = [x..y] myArray = listArray (CrashIx 0, CrashIx 0) [0] crash = myArray ! (CrashIx maxBound) In ghci-5.00, I get a segfault and hugs-feb-2000 says: INTERNAL ERROR: Error in graph Now, admittedly my Ix instance is broken, but I don't think I should be able to segfault the interpreter. Unfortunately, I think the only way to fix this without changing the Library Report would be to add another layer of range checking to the array implementation. Bleh. Note also that the (inefficient) implementation in the report wouldn't crash, but would get the wrong error: Undefined array element instead of Index out of range. I think we might describe this as a bug in the Library Report, rather than in any particular Haskell implementation. Enjoy! Matt Harden ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [Fwd: Bug#94739: ./.ghci -- isn't it dangerous?]
I agree that this feature is dangerous. I would prefer it be turned off by default and an option given to enable it. Better yet, why not turn it off altogether and add a builtin command that sources another file. That way, users could add: :source ./.ghci to their $HOME/.ghci file to get the current behavior, and users could also take steps to protect themselves before sourceing the other file. I would also suggest checking that $HOME/.ghci is owned by the current user and not group- or world- writeable before sourcing it. Michael Weber wrote: Please, preserve the Cc: when replying. ghci will load .ghci from current directory and it can contain :! shell commands, so if I run ghci in a directory writable by others bad things can happen eg. to my files. On the other hand it's useful. Maybe it could be less dangerous if the immediately damaging stuff (:!) was disabled and some warning printed if the file was writable (or owned) by someone else? Thanks, Matt Harden ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [Fwd: Bug#94739: ./.ghci -- isn't it dangerous?]
Matt Harden wrote: ...why not ... add a builtin command that sources another file. How embarrassing... :def source readFile :-) Now I definitely want the automatic sourcing of ./.ghci turned off; I can already create a safer alternative myself. Thanks, Matt Harden ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [Fwd: Bug#94739: ./.ghci -- isn't it dangerous?]
I mean: :def source IO.readFile Matt Harden wrote: Matt Harden wrote: ...why not ... add a builtin command that sources another file. How embarrassing... :def source readFile :-) Now I definitely want the automatic sourcing of ./.ghci turned off; I can already create a safer alternative myself. Thanks, Matt Harden ___ 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
GHC-4.01 build errors - PrelBase.lhs
I'm trying to build version 4.01 on a Linux pentium, using freshly installed binary of 4.01, and I get this error message when running a "gmake all" ==fptools== gmake all --no-print-directory -r; in /home/kultarr/year4/mattl/ghc-4.01/ghc/lib/std rm -f PrelBase.o ; if [ ! -d PrelBase ]; then mkdir PrelBase; else find PrelBase -name '*.o' -print | xargs rm -f __rm_food ; fi ; ../../../ghc/driver/ghc -recomp -cpp -fglasgow-exts -fvia-C -Rghc-timing -O -split-objs -odir PrelBase -H10m -i. -c PrelBase.lhs -o PrelBase.o -osuf o PrelBase.lhs:18: Could not find valid interface file `PrelErr' PrelBase.lhs:18: Module `PrelErr' does not export `error' PrelBase.lhs:19: Could not find valid interface file `PrelGHC' It's complaining about not finding an interface file, but I've got both PrelErr.hi-boot and I even compiled PrelErr.lhs to get the PrelErr.hi file. mattl@deckchair mattl@deckchairpwd /home/kidna/year4/mattl/source_tree/ghc/lib/std mattl@deckchairls *hi* Main.hi-boot PrelException.hi-boot PrelGHC.p_hi PrelErr.hi PrelGHC.hi PrelPack.hi-boot PrelErr.hi-bootPrelGHC.hi-boot mattl@deckchair mattl@deckchair Does this mean that the interface files are *invalid* ? I was able to compile 4.00 with a little bit of fiddling around, but this one has got me stumped -- -- `Where do I want to go today? Poland, Czechoslovakia, France. Can Microsoft Office do that for me?" - Adolf Hitler Matthew Love ADI Limited, Systems Group Phone +61 8 9333 8936 (wk) +61 8 94495 702(hm) mailto:[EMAIL PROTECTED]
build errors in ghc-current-src (ghc-4.00)
Hiya Simon, I've just download the ghc-current-src.tar.gz file and tried to build a new ghc. The configure went alright, but when it came time to do a gmake boot I get the attached error messages. Is this a problem in the distribution, or something that I have missed out about? I had a look on your webpages for a patch but didn't see anything. I'm compiling using a prebuilt ghc-2.10, on a Pentium/Linux machine with 32M ram and ~100M swap. I've even copied PrelArr.lhs into the thanks -- Matthew Love Command Control Information Systems ADI Limited, Systems Group Phone +61 8 9333 8936 (wk) +61 8 9272 5227 (hm) Fax +61 8 9333 8889 mailto:[EMAIL PROTECTED] ghc -M -optdep-f -optdep.depend -optdep-o -optdepo-cpp -fglasgow-exts -Rghc-timing -I. -IcodeGen -InativeGen -Iparser -iutils:basicTypes:types:hsSyn:prelude:rename:typecheck:deSugar:coreSyn:specialise:simplCore:stranal:stgSyn:simplStg:codeGen:absCSyn:main:reader:profiling:parser:nativeGen -recomp parser/U_binding.hs parser/U_constr.hs parser/U_either.hs parser/U_entidt.hs parser/U_list.hs parser/U_literal.hs parser/U_maybe.hs parser/U_pbinding.hs parser/U_qid.hs parser/U_tree.hs parser/U_ttype.hs utils/Argv.lhs utils/Bag.lhs utils/BitSet.lhs utils/Digraph.lhs utils/DirUtils.lhs utils/FastString.lhs utils/FiniteMap.lhs utils/ListSetOps.lhs utils/Maybes.lhs utils/OrdList.lhs utils/Outputable.l hs utils/Pretty.lhs utils/PrimPacked.lhs utils/SST.lhs utils/StringBuffer.lhs utils/UniqFM.lhs utils/UniqSet.lhs utils/Util.lhs basicTypes/BasicTypes.lhs basicTypes/Const.lhs basicTypes/DataCon.lhs basicTypes/Demand.lhs basicTypes/FieldLabel.lhs basicTypes/Id.lhs bas! icTypes/IdInfo.lhs basicTypes/MkId.lhs basicTypes/Name.lhs basicTypes/NameSet.lhs basicTypes/PprEnv.lhs basicTypes/SrcLoc.lhs basicTypes/UniqSupply.lhs basicTypes/Unique.lhs basicTypes/Var.lhs basicTypes/VarEnv.lhs basicTypes/VarSet.lhs types/Class.lhs types/PprType.lhs types/TyCon.lhs types/Type.lhs types/Unify.lhs hsSyn/HsBasic.lhs hsSyn/HsBinds.lhs hsSyn/HsCore.lhs hsSyn/HsDecls.lhs hsSyn/HsExpr.lhs hsSyn/HsImpExp.lhs hsSyn/HsMatches.lhs hsSyn/HsPat.lhs hsSyn/HsPragmas.lhs hsSyn/HsSyn.lhs hsSyn/HsTypes.lhs prelude/PrelInfo.lhs prelude/PrelMods.lhs prelude/PrelVals.lhs prelude/PrimOp.lhs prelude/PrimRep.lhs prelude/TysPrim.lhs prelude/TysWiredIn.lhs rename/Rename.lhs rename/RnBinds.lhs rename/RnEnv.lhs rename/RnExpr.lhs rename/RnHsSyn.lhs rena me/RnIfaces.lhs rename/RnMonad.lhs rename/RnNames.lhs rename/RnSource.lhs typecheck/Inst.lhs typecheck/TcBinds.lhs typecheck/TcClassDcl.lhs typecheck/TcDefaults.lhs typecheck/TcD .lhs simplCore/SAT.lhs simplCore/SATMonad.lhs simplCore/SetLevels.lhs simplCore/SimplCore.lhs simplCore/SimplMonad.lhs simplCore/SimplUtils.lhs simplCore/Simplify.lhs stranal/SaAbsInt.lhs stranal/SaLib.lhs stranal/StrictAnal.lhs stranal/WorkWrap.lhs stranal/WwLib.lhs stgSyn/CoreToStg.lhs stgSyn/StgLint.lhs stgSyn/StgSyn.lhs simplStg/LambdaLift.lhs simplStg/SRT.lhs simplStg/SimplStg.lhs simplStg/StgStats.lhs simplStg/StgVarInfo.lhs simplStg/UpdAnal.lhs codeGen/CgBindery.lhs codeGen/CgCase.lhs codeGen/CgClosure.lhs codeGen/CgCon.lhs codeGen/CgConTbls.lhs codeGen/CgExpr.lhs codeGen/CgHeapery.lhs codeGen/CgLetNoEscape.lhs codeGen/CgMonad.lhs codeGen/CgRetConv.lhs codeGen/CgStackery.lhs codeGen/CgTailCall.lhs codeGen/CgUpdate.lhs codeGen/CgUsages.lhs codeGen/ClosureInfo.lhs codeGen/CodeGen.lhs codeGen/SM! Rep.lhs absCSyn/AbsCSyn.lhs absCSyn/AbsCUtils.lhs absCSyn/CLabel.lhs absCSyn/CStrings.lhs absCSyn/CallConv.lhs absCSyn/Costs.lhs absCSyn/PprAbsC.lhs main/CmdLineOpts.lhs main/Constants.lhs main/ErrUtils.lhs main/M ain.lhs main/MkIface.lhs reader/Lex.lhs reader/PrefixSyn.lhs reader/PrefixToHs.lhs reader/RdrHsSyn.lhs reader/ReadPrefix.lhs profiling/CostCentre.lhs profiling/SCCfinal.lhs parser/UgenAll.lhs parser/UgenUtil.lhs nativeGen/AbsCStixGen.lhs nativeGen/AsmCodeGen.lhs nativeGen/AsmRegAlloc.lhs nativeGen/MachCode.lhs nativeGen/MachMisc.lhs nativeGen/MachRegs.lhs nativeGen/PprMach.lhs nativeGen/RegAllocInfo.lhs nativeGen/Stix.lhs nativeGen/StixInfo.lhs nativeGen/StixInteger.lhs nativeGen/StixMacro.lhs nativeGen/StixPrim.lhs rename/ParseIface.hs This is GHC 2.10 - [CONTROL VERSION] No file `PrelArr.hi', `PrelArr.lhs', `PrelArr.hs' (reqd from file `utils/Outputable.lhs') among import directories: utils:basicTypes:types:hsSyn:prelude:rename:typecheck:deSugar:coreSyn:specialise:simplCore:stranal:stgSyn:simplStg:codeGen:absCSyn:main:reader:profiling:parser:nativeGen:. cpp: output pipe has been closed gmake[2]: *** [depend] Error 1 gmake[1]: *** [boot] Error 1 gmake: *** [boot] Error 1 [1] + exit 2 gmake boot mattl 8
