July 2014 - ghc-tickets

[GHC] #9373: typeable instances incompatible between 7.8 and 7.9
by GHC 28 Jul '14

28 Jul '14

#9373: typeable instances incompatible between 7.8 and 7.9 -------------------------------------+------------------------------------- Reporter: carter | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- not sure if this is deliberate or by design, but to get some typeable instances happy for some DataKind heavy code, if i wish it to build in both 7.8 and 7.9, i need to write it in the following form {{{#!hs {-# LANGUAGE DataKinds, GADTs, TypeFamilies, TypeOperators, ConstraintKinds, ScopedTypeVariables, RankNTypes #-} data Nat = S !Nat | Z deriving (Eq,Show,Read,Typeable,Data) #if defined(__GLASGOW_HASKELL__) && ( __GLASGOW_HASKELL__ >= 707) && ( __GLASGOW_HASKELL__ < 709) deriving instance Typeable 'Z deriving instance Typeable 'S #endif }}} if i omit the latter typeables in 7.8, i can't get typeable instances for Nat indexed data types, but i get a GHC error if i include them in 7.9 {{{ Duplicate instance declarations: instance Typeable 'S -- Defined at src/Numerical/Nat.hs:24:28 instance Typeable 'S -- Defined at src/Numerical/Nat.hs:28:1 src/Numerical/Nat.hs:24:28: Duplicate instance declarations: instance Typeable 'Z -- Defined at src/Numerical/Nat.hs:24:28 instance Typeable 'Z -- Defined at src/Numerical/Nat.hs:27:1 }}} https://travis-ci.org/wellposed/numerical/jobs/31011288#L525 for context I can work around it with CPP, but is this a deliberate change or accidental? (i'm ok with that CPP being there, but would like some confirmation this is a deliberate change) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9373> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7828: RebindableSyntax and Arrow
by GHC 28 Jul '14

28 Jul '14

#7828: RebindableSyntax and Arrow -------------------------------------+------------------------------------- Reporter: | Owner: jstolarek AlessandroVermeulen | Status: new Type: bug | Milestone: 7.10.1 Priority: normal | Version: 7.6.2 Component: Compiler | Keywords: (Type checker) | Architecture: Unknown/Multiple Resolution: | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: #1537, #3613 Type of failure: GHC | rejects valid program | Test Case: | Blocking: | Differential Revisions: Phab:D72 | -------------------------------------+------------------------------------- Comment (by simonpj): The new one. After all, the new one is what you propose! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7828#comment:48> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
by GHC 28 Jul '14

28 Jul '14

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation -------------------------------------+---------------------------------- Reporter: Doug310 | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: 7.8.4 Component: GHCi | Version: 7.8.1-rc1 Resolution: | Keywords: exponentiation Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+---------------------------------- Comment (by hvr): Replying to [comment:33 rwbarton]: > So if we wait for GMP 6.0.1 and then update the in-tree tarball, this should get fixed automatically. I'd rather get rid of the in-tree GMP tarball altogether than updating it, as it will increase the ghc.git history by a 2MiB blob everyone will have to download each time `ghc.git` gets cloned. Morever, the work I'm doing in #9281 is also somewhat motivated by finally getting rid of the in-tree GMP tarball for good. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:34> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7828: RebindableSyntax and Arrow
by GHC 28 Jul '14

28 Jul '14

#7828: RebindableSyntax and Arrow -------------------------------------+------------------------------------- Reporter: | Owner: jstolarek AlessandroVermeulen | Status: new Type: bug | Milestone: 7.10.1 Priority: normal | Version: 7.6.2 Component: Compiler | Keywords: (Type checker) | Architecture: Unknown/Multiple Resolution: | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: #1537, #3613 Type of failure: GHC | rejects valid program | Test Case: | Blocking: | Differential Revisions: Phab:D72 | -------------------------------------+------------------------------------- Comment (by jstolarek): I admit I am not certain if I can reliably produce such a specification. But I will be thinking about it. Regarding first bullet: my plan was to change the representation of arrow notation in HsSyn. Would you like the specification to contain current representation or the planned new one? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7828#comment:47> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7593: Unable to print exceptions of unicode identifiers
by GHC 27 Jul '14

27 Jul '14

#7593: Unable to print exceptions of unicode identifiers -------------------------------------+------------------------------------- Reporter: dagit | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.6.1 Resolution: | Keywords: Operating System: Windows | Architecture: Unknown/Multiple Type of failure: Incorrect | Difficulty: Unknown warning at compile-time | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): This issue affects both Win32 consoles (e.g., cmd.exe) and mintty consoles (e.g., Cygwin and MSYS), but in different ways. In mintty consoles, the issue is easily fixed by setting the encoding of the file handle to {{{utf8}}}: {{{ > putStrLn "→" *** Exception: <stdout>: hPutChar: invalid argument (invalid character) > import System.IO > hSetEncoding stdout utf8 > putStrLn "→" → > getChar >>= putChar → Γ> getChar >>= putChar å> getChar >>= putChar Æ> getChar >>= putChar > hSetEncoding stdin utf8 > getChar >>= putChar → →> }}} Fixing the issue on Win32 consoles is not as easy. One approach is to use the FFI to call the native API calls for Unicode output ([http://msdn.microsoft.com/en- us/library/windows/desktop/ms687401%28v=vs.85%29.aspx WriteConsoleW]) and input ([http://msdn.microsoft.com/en- us/library/windows/desktop/ms684961%28v=vs.85%29.aspx ReadConsoleInputW]). This is the approach that [https://github.com/judah/haskeline/blob/0f4ba2c51691f2031371c0bfadcd652abf5… haskeline] takes, and it seems to work well: {{{ > import System.Console.Haskeline > import Data.Maybe > runInputT defaultSettings (getInputChar "") >>= runInputT defaultSettings . outputStrLn . (:[]) . fromJust → → }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7593#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
by GHC 27 Jul '14

27 Jul '14

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation -------------------------------------+---------------------------------- Reporter: Doug310 | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: 7.8.4 Component: GHCi | Version: 7.8.1-rc1 Resolution: | Keywords: exponentiation Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+---------------------------------- Comment (by rwbarton): So GMP 6 has (as I mentioned above) a macro to allocate small blocks with `alloca` and large blocks with `malloc`. The current release does not correctly use this macro in the code in question, but [https://gmplib.org/repo/gmp-6.0/rev/84965a50fd92 this backported patch] fixes this. So if we wait for GMP 6.0.1 and then update the in-tree tarball, this should get fixed automatically. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:33> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
by GHC 27 Jul '14

27 Jul '14

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation -------------------------------------+---------------------------------- Reporter: Doug310 | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: 7.8.4 Component: GHCi | Version: 7.8.1-rc1 Resolution: | Keywords: exponentiation Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+---------------------------------- Comment (by rwbarton): Actually a few things were not quite right in that. `--enable- alloca=reentrant` is not the same as `WANT_TMP_REENTRANT`! It means "use `WANT_TMP_ALLOCA` if you have `alloca`, otherwise use `WANT_TMP_REENTRANT`". So that explains how `WANT_TMP_ALLOCA` is getting set. Also, my examination of the Debian `libgmp.so.10` was overly hasty. It is actually built with `WANT_TMP_ALLOCA`. There are several allocation paths in `mpn_mul`, and some call `malloc` when the amount to be allocated exceeds a certain threshold, while others unconditionally allocate on the stack. Not sure what the best thing to do here is aside from resorting to `WANT_TMP_REENTRANT`, which I fear may carry a noticeable performance penalty. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:32> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
by GHC 27 Jul '14

27 Jul '14

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation -------------------------------------+---------------------------------- Reporter: Doug310 | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: 7.8.4 Component: GHCi | Version: 7.8.1-rc1 Resolution: | Keywords: exponentiation Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+---------------------------------- Comment (by rwbarton): Thanks, that was helpful. GMP does large temporary allocations in, for example, `mpn_mul`. Somehow, we are configuring GMP to use `alloca` for temporary allocations. In the most recent report, we happened to `alloca` past the stack guard page and a malloc guard page, and then we crashed when we wrote into the "allocated" memory that was actually the malloc guard page. (Note that the "Stack" VM region is not actually the stack, it's a stack guard page.) In the original report, it's hard to tell what's going on with no symbols (due to the old ghci linker) but it looks like we may have `alloca`ed directly into the stack guard page. I imagine that we only saw this in ghci because non-threaded programs have larger stack areas (and maybe no guard pages). GMP's temporary allocation method is controlled by the CPP symbols `WANT_TMP_ALLOCA`, `WANT_TMP_REENTRANT` etc. I don't understand how it is happening that we build with `WANT_TMP_ALLOCA` when (per `configure.in`) the default setting for `--enable-alloca` is `reentrant`. But I was able to confirm from examining `libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib` that it is using `alloca`, and mzero also provided the [http://lpaste.net/108250 config.h] file from his build of GHC which includes `#define WANT_TMP_ALLOCA 1`. `WANT_TMP_REENTRANT` is the default, and what Debian's build of libgmp uses, so we should just use that. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:31> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation
by GHC 27 Jul '14

27 Jul '14

#7655: 7.6.2 Segmentation Fault/Bus Error in large exponentation -------------------------------------+---------------------------------- Reporter: Doug310 | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: 7.8.4 Component: GHCi | Version: 7.8.1-rc1 Resolution: | Keywords: exponentiation Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+---------------------------------- Comment (by croyd): Hi, I think I ran in to this issue running the following code (fibonacci matrix exponentiation) in ghci. It seems to happen every single time I execute it inside ghci, but never when using the full compiler (ghc --make). {{{#!hs module Matrix where data Matrix = Matrix Integer Integer Integer Integer deriving (Eq, Show) instance Num Matrix where fromInteger n = Matrix n n n n negate = undefined (+) = plusMatrix (*) = mulMatrix abs (Matrix a00 a01 a10 a11) = Matrix a00' a01' a10' a11' where a00' = abs a00 a01' = abs a01 a10' = abs a10 a11' = abs a11 signum = undefined plusMatrix :: Matrix -> Matrix -> Matrix (Matrix a00 a01 a10 a11) `plusMatrix` (Matrix b00 b01 b10 b11) = Matrix (a00 + b00) (a01 + b01) (a10 + b10) (a11 + b11) mulMatrix :: Matrix -> Matrix -> Matrix (Matrix a00 a01 a10 a11) `mulMatrix` (Matrix b00 b01 b10 b11) = Matrix a00' a01' a10' a11' where a00' = a00 * b00 + a01 * b10 a01' = a00 * b01 + a01 * b11 a10' = a10 * b00 + a11 * b10 a11' = a10 * b10 + a11 * b11 fib4 :: Integer -> Integer fib4 0 = 0 fib4 n = case f ^ n of Matrix _ fn _ _ -> fn where f = Matrix 1 1 1 0 main = do print $ fib4 1000 -- ok putStrLn $ replicate 80 '-' print $ fib4 10000 -- ok putStrLn $ replicate 80 '-' print $ fib4 1000000 -- bus error: 10 }}} crash report: {{{ Process: ghc [30070] Path: /usr/local/lib/ghc-7.8.3/bin/ghc Identifier: ghc Version: ??? Code Type: X86-64 (Native) Parent Process: bash [97679] User ID: 501 Date/Time: 2014-07-27 15:30:12.594 -0500 OS Version: Mac OS X 10.8.4 (12E55) Report Version: 10 Crashed Thread: 1 Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000115341000 VM Regions Near 0x115341000: MALLOC metadata 000000011532c000-0000000115341000 [ 84K] rw-/rwx SM=COW --> MALLOC guard page 0000000115341000-0000000115342000 [ 4K] ---/rwx SM=NUL Stack 0000000115342000-0000000115343000 [ 4K] ---/rwx SM=NUL Thread 0:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x00007fff8d3340fa __psynch_cvwait + 10 1 libsystem_c.dylib 0x00007fff8d853fe9 _pthread_cond_wait + 869 2 libHSrts_thr-ghc7.8.3.dylib 0x00000001152bde86 waitCondition + 6 3 libHSrts_thr-ghc7.8.3.dylib 0x0000000115297752 yieldCapability + 354 4 libHSrts_thr-ghc7.8.3.dylib 0x00000001152a7f26 schedule + 502 5 libHSrts_thr-ghc7.8.3.dylib 0x00000001152a7d17 scheduleWaitThread + 167 6 libHSrts_thr-ghc7.8.3.dylib 0x00000001152a3eea hs_main + 138 7 ghc 0x000000010e8c6d73 main + 115 8 ghc 0x000000010e7ddc34 start + 52 Thread 1 Crashed: 0 libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib 0x0000000115178811 __gmpn_addlsh2_n + 289 1 libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib 0x00000001151b87aa __gmpn_toom43_mul + 202 2 libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib 0x0000000115196c6b __gmpn_mul + 1835 3 libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib 0x000000011519d795 __gmpn_tdiv_qr + 3221 4 libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib 0x00000001151b4b88 __gmpz_tdiv_qr + 408 5 libHSinteger-gmp-0.5.1.0-ghc7.8.3.dylib 0x0000000115175b9f integer_cmm_quotRemIntegerzh + 207 6 libHSbase-4.7.0.1-ghc7.8.3.dylib 0x0000000114af08f0 c6Zm_info + 56 Thread 2: 0 libsystem_kernel.dylib 0x00007fff8d334f96 poll + 10 1 libHSbase-4.7.0.1-ghc7.8.3.dylib 0x0000000114be1444 cbep_info + 660 2 ??? 0x0000000115727e83 0 + 4654792323 Thread 3: 0 libsystem_kernel.dylib 0x00007fff8d334d16 kevent + 10 1 libHSbase-4.7.0.1-ghc7.8.3.dylib 0x0000000114ba3de5 cbpC_info + 173 2 libHSbase-4.7.0.1-ghc7.8.3.dylib 0x0000000114ba4908 cbuZ_info + 56 Thread 4: 0 libsystem_kernel.dylib 0x00007fff8d3340fa __psynch_cvwait + 10 1 libsystem_c.dylib 0x00007fff8d853fe9 _pthread_cond_wait + 869 2 libHSrts_thr-ghc7.8.3.dylib 0x00000001152bde86 waitCondition + 6 3 libHSrts_thr-ghc7.8.3.dylib 0x0000000115297752 yieldCapability + 354 4 libHSrts_thr-ghc7.8.3.dylib 0x00000001152a7f26 schedule + 502 5 libHSrts_thr-ghc7.8.3.dylib 0x00000001152a88bd scheduleWorker + 13 6 libsystem_c.dylib 0x00007fff8d84f7a2 _pthread_start + 327 7 libsystem_c.dylib 0x00007fff8d83c1e1 thread_start + 13 Thread 1 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x000000000000045b rcx: 0xfffffffffffffe84 rdx: 0x00000001154a0b68 rdi: 0x0000000115341bd0 rsi: 0x000000011549c5b8 rbp: 0x0000000115338f40 rsp: 0x0000000115338ec8 r8: 0x0000000000000001 r9: 0x0000000000000003 r10: 0x0000000000000003 r11: 0x0000000000000003 r12: 0xa37d223548939bc0 r13: 0x45cb5efb1fce45fd r14: 0x1ad82f94a68b146b r15: 0xaef755979088a4bb rip: 0x0000000115178811 rfl: 0x0000000000010286 cr2: 0x0000000115341000 Logical CPU: 2 Binary Images: 0x10e7dc000 - 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0x11413affe +libHSpretty-1.1.1.1-ghc7.8.3.dylib (0) <2CC28F0F-6F2F-3CEC-8A6F- DB9633147377> /usr/local/lib/ghc-7.8.3/pretty-1.1.1.1/libHSpretty-1.1.1.1-ghc7.8.3.dylib 0x114151000 - 0x1142bcffe +libHScontainers-0.5.5.1-ghc7.8.3.dylib (0) <511470B1-0294-3F78-8BB7-CDC53E592EE1> /usr/local/lib/ghc-7.8.3/containers-0.5.5.1/libHScontainers-0.5.5.1-ghc7.8.3.dylib 0x1143b1000 - 0x1143bffff +libHSdirectory-1.2.1.0-ghc7.8.3.dylib (0) <BBFAB672-10AD- 326B-9080-09C1B8B04412> /usr/local/lib/ghc-7.8.3/directory-1.2.1.0/libHSdirectory-1.2.1.0-ghc7.8.3.dylib 0x1143d7000 - 0x114431ff7 +libHSunix-2.7.0.1-ghc7.8.3.dylib (0) <82865E9A-9BBF-32B9-8A8A-31C61A1A87D7> /usr/local/lib/ghc-7.8.3/unix-2.7.0.1/libHSunix-2.7.0.1-ghc7.8.3.dylib 0x1144c3000 - 0x11454cfff +libHStime-1.4.2-ghc7.8.3.dylib (0) <9F64C699-AEC9-372D-A926-A3D9114E5A40> /usr/local/lib/ghc-7.8.3/time-1.4.2/libHStime-1.4.2-ghc7.8.3.dylib 0x1145fb000 - 0x114601ffb +libHSold- locale-1.0.0.6-ghc7.8.3.dylib (0) <1D324A30-3A30-3C2B-855B-BBE85CD3E46E> /usr/local/lib/ghc-7.8.3/old-locale-1.0.0.6/libHSold- locale-1.0.0.6-ghc7.8.3.dylib 0x114611000 - 0x114621ffd +libHSfilepath-1.3.0.2-ghc7.8.3.dylib (0) <6A655401-5A48-3311-9F47-4913B98A1835> /usr/local/lib/ghc-7.8.3/filepath-1.3.0.2/libHSfilepath-1.3.0.2-ghc7.8.3.dylib 0x11463e000 - 0x1146c9fff +libHSbytestring-0.10.4.0-ghc7.8.3.dylib (0) <37CA9ED5-C80A-3AEB- AE07-563EA9F8E0BC> /usr/local/lib/ghc-7.8.3/bytestring-0.10.4.0/libHSbytestring-0.10.4.0-ghc7.8.3.dylib 0x11475a000 - 0x11475cff8 +libHSdeepseq-1.3.0.2-ghc7.8.3.dylib (0) <DC275F7A-BBCD- 319A-A454-2720B46982FD> /usr/local/lib/ghc-7.8.3/deepseq-1.3.0.2/libHSdeepseq-1.3.0.2-ghc7.8.3.dylib 0x114769000 - 0x1147d4ff9 +libHSarray-0.5.0.0-ghc7.8.3.dylib (0) <40F4C2AD-861A-3048-AE8D-970E3D6915D3> /usr/local/lib/ghc-7.8.3/array-0.5.0.0/libHSarray-0.5.0.0-ghc7.8.3.dylib 0x11483f000 - 0x114c17ff7 +libHSbase-4.7.0.1-ghc7.8.3.dylib (0) <363FAE50-2090-3B3F-B9CC-BAF20493C5A9> /usr/local/lib/ghc-7.8.3/base-4.7.0.1/libHSbase-4.7.0.1-ghc7.8.3.dylib 0x115167000 - 0x1151d8fc7 +libHSinteger- gmp-0.5.1.0-ghc7.8.3.dylib (0) <1904D998-1201-3691-BFA6-0B7E8C73D9E2> /usr/local/lib/ghc-7.8.3/integer-gmp-0.5.1.0/libHSinteger- gmp-0.5.1.0-ghc7.8.3.dylib 0x1151f7000 - 0x115240ff7 +libHSghc- prim-0.3.1.0-ghc7.8.3.dylib (0) <7A005B4C-2B84-3FC4-8A8E-F4384C458F17> /usr/local/lib/ghc-7.8.3/ghc-prim-0.3.1.0/libHSghc- prim-0.3.1.0-ghc7.8.3.dylib 0x115295000 - 0x1152e5fff +libHSrts_thr-ghc7.8.3.dylib (0) <C4F957DB-DCE5-34D4-B4F3-495B54AB59B1> /usr/local/lib/ghc-7.8.3/rts-1.0 /libHSrts_thr-ghc7.8.3.dylib 0x11530d000 - 0x115310fff +libffi.dylib (7) <F1F11422-6371-3183-9256-5B85867D7B05> /usr/local/lib/ghc-7.8.3/rts-1.0/libffi.dylib 0x7fff6e3dc000 - 0x7fff6e41093f dyld (210.2.3) <A40597AA-5529-3337-8C09-D8A014EB1578> /usr/lib/dyld 0x7fff83549000 - 0x7fff8354cff7 libdyld.dylib (210.2.3) <F59367C9-C110-382B-A695-9035A6DD387E> /usr/lib/system/libdyld.dylib 0x7fff839a7000 - 0x7fff839afff7 libsystem_dnssd.dylib (379.38.1) <BDCB8566-0189-34C0-9634-35ABD3EFE25B> /usr/lib/system/libsystem_dnssd.dylib 0x7fff83e54000 - 0x7fff83ea0ff7 libauto.dylib (185.4) <AD5A4CE7-CB53-313C-9FAE-673303CC2D35> /usr/lib/libauto.dylib 0x7fff848cc000 - 0x7fff848d1fff libcache.dylib (57) <65187C6E- 3FBF-3EB8-A1AA-389445E2984D> /usr/lib/system/libcache.dylib 0x7fff8519c000 - 0x7fff851a7fff libsystem_notify.dylib (98.5) <C49275CC-835A-3207-AFBA-8C01374927B6> /usr/lib/system/libsystem_notify.dylib 0x7fff8750c000 - 0x7fff8750dfff libsystem_blocks.dylib (59) <D92DCBC3-541C-37BD-AADE-ACC75A0C59C8> /usr/lib/system/libsystem_blocks.dylib 0x7fff8787a000 - 0x7fff87888fff libcommonCrypto.dylib (60027) <BAAFE0C9-BB86-3CA7-88C0-E3CBA98DA06F> /usr/lib/system/libcommonCrypto.dylib 0x7fff8793e000 - 0x7fff8793fff7 libremovefile.dylib (23.2) <6763BC8E-18B8-3AD9-8FFA-B43713A7264F> /usr/lib/system/libremovefile.dylib 0x7fff8798b000 - 0x7fff8798cff7 libSystem.B.dylib (169.3) <365477AB-D641-389D-B8F4-A1FAE9657EEE> /usr/lib/libSystem.B.dylib 0x7fff87bd0000 - 0x7fff87bd2ff7 libunc.dylib (25) <92805328-CD36-34FF-9436-571AB0485072> /usr/lib/system/libunc.dylib 0x7fff88180000 - 0x7fff8818eff7 libsystem_network.dylib (77.10) <0D99F24E-56FE-380F-B81B-4A4C630EE587> /usr/lib/system/libsystem_network.dylib 0x7fff8822b000 - 0x7fff88233fff liblaunch.dylib (442.26.2) <2F71CAF8-6524-329E-AC56-C506658B4C0C> /usr/lib/system/liblaunch.dylib 0x7fff88395000 - 0x7fff8848afff libiconv.2.dylib (34) <FEE8B996-EB44-37FA-B96E-D379664DEFE1> /usr/lib/libiconv.2.dylib 0x7fff889a9000 - 0x7fff88ac192f libobjc.A.dylib (532.2) <90D31928 -F48D-3E37-874F-220A51FD9E37> /usr/lib/libobjc.A.dylib 0x7fff89440000 - 0x7fff89442fff libquarantine.dylib (52.1) <143B726E-DF47-37A8-90AA-F059CFD1A2E4> /usr/lib/system/libquarantine.dylib 0x7fff89696000 - 0x7fff896c4ff7 libsystem_m.dylib (3022.6) <B434BE5C-25AB-3EBD-BAA7-5304B34E3441> /usr/lib/system/libsystem_m.dylib 0x7fff896c5000 - 0x7fff896e7ff7 libxpc.dylib (140.43) <70BC645B-6952-3264-930C-C835010CCEF9> /usr/lib/system/libxpc.dylib 0x7fff8ac55000 - 0x7fff8ac5afff libcompiler_rt.dylib (30) <08F8731D-5961-39F1-AD00-4590321D24A9> /usr/lib/system/libcompiler_rt.dylib 0x7fff8bb78000 - 0x7fff8bb8dff7 libdispatch.dylib (228.23) <D26996BF-FC57-39EB-8829-F63585561E09> /usr/lib/system/libdispatch.dylib 0x7fff8d2d2000 - 0x7fff8d321ff7 libcorecrypto.dylib (106.2) <CE0C29A3-C420-339B-ADAA-52F4683233CC> /usr/lib/system/libcorecrypto.dylib 0x7fff8d322000 - 0x7fff8d33dff7 libsystem_kernel.dylib (2050.24.15) <A9F97289-7985-31D6-AF89-151830684461> /usr/lib/system/libsystem_kernel.dylib 0x7fff8d83b000 - 0x7fff8d907ff7 libsystem_c.dylib (825.26) <4C9EB006-FE1F-3F8F-8074-DFD94CF2CE7B> /usr/lib/system/libsystem_c.dylib 0x7fff8d9d9000 - 0x7fff8d9d9fff libkeymgr.dylib (25) <CC9E3394-BE16-397F-926B-E579B60EE429> /usr/lib/system/libkeymgr.dylib 0x7fff8dce2000 - 0x7fff8dce3fff libDiagnosticMessagesClient.dylib (8) <8548E0DC-0D2F-30B6-B045-FE8A038E76D8> /usr/lib/libDiagnosticMessagesClient.dylib 0x7fff8dd40000 - 0x7fff8dd41ff7 libsystem_sandbox.dylib (220.3) <B739DA63-B675-387A-AD84-412A651143C0> /usr/lib/system/libsystem_sandbox.dylib 0x7fff8eb49000 - 0x7fff8eb4aff7 libdnsinfo.dylib (453.19) <14202FFB-C3CA-3FCC-94B0-14611BF8692D> /usr/lib/system/libdnsinfo.dylib 0x7fff8eb4b000 - 0x7fff8eb70ff7 libc++abi.dylib (26) <D86169F3-9F31-377A-9AF3-DB17142052E4> /usr/lib/libc++abi.dylib 0x7fff8ebc5000 - 0x7fff8ec2dff7 libc++.1.dylib (65.1) <20E31B90-19B9-3C2A-A9EB-474E08F9FE05> /usr/lib/libc++.1.dylib 0x7fff8f14c000 - 0x7fff8f152fff libmacho.dylib (829) <BF332AD9 -E89F-387E-92A4-6E1AB74BD4D9> /usr/lib/system/libmacho.dylib 0x7fff8f26d000 - 0x7fff8f2a5fff libncurses.5.4.dylib (37.3) <68D5B5F5-8252-3F1E-AFF1-C6AFE145DBC1> /usr/lib/libncurses.5.4.dylib 0x7fff8f4ef000 - 0x7fff8f4f6fff libcopyfile.dylib (89) <876573D0-E907-3566-A108-577EAD1B6182> /usr/lib/system/libcopyfile.dylib 0x7fff8f746000 - 0x7fff8f77cfff libsystem_info.dylib (406.17) <4FFCA242-7F04-365F-87A6-D4EFB89503C1> /usr/lib/system/libsystem_info.dylib 0x7fff8f77d000 - 0x7fff8f783ff7 libunwind.dylib (35.1) <21703D36 -2DAB-3D8B-8442-EAAB23C060D3> /usr/lib/system/libunwind.dylib External Modification Summary: Calls made by other processes targeting this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by all processes on this machine: task_for_pid: 11291 thread_create: 1 thread_set_state: 0 VM Region Summary: ReadOnly portion of Libraries: Total=159.5M resident=138.3M(87%) swapped_out_or_unallocated=21.2M(13%) Writable regions: Total=52.5M written=21.6M(41%) resident=23.9M(46%) swapped_out=0K(0%) unallocated=28.6M(54%) REGION TYPE VIRTUAL =========== ======= MALLOC 18.2M MALLOC guard page 16K STACK GUARD 56.0M Stack 10.0M VM_ALLOCATE 19.0M __DATA 5892K __LINKEDIT 93.8M __TEXT 65.7M shared memory 12K =========== ======= TOTAL 268.5M }}} $ ghc --info {{{ [("Project name","The Glorious Glasgow Haskell Compilation System") ,("GCC extra via C opts"," -fwrapv") ,("C compiler command","/usr/local/bin/gcc") ,("C compiler flags"," -m64 -fno-stack-protector") ,("C compiler link flags"," -m64") ,("Haskell CPP command","/usr/local/bin/gcc") ,("Haskell CPP flags","-E -undef -traditional ") ,("ld command","/usr/bin/ld") ,("ld flags"," -arch x86_64") ,("ld supports compact unwind","YES") ,("ld supports build-id","NO") ,("ld supports filelist","YES") ,("ld is GNU ld","NO") ,("ar command","/usr/bin/ar") ,("ar flags","clqs") ,("ar supports at file","NO") ,("touch command","touch") ,("dllwrap command","/bin/false") ,("windres command","/bin/false") ,("libtool command","libtool") ,("perl command","/usr/bin/perl") ,("target os","OSDarwin") ,("target arch","ArchX86_64") ,("target word size","8") ,("target has GNU nonexec stack","False") ,("target has .ident directive","True") ,("target has subsections via symbols","True") ,("Unregisterised","NO") ,("LLVM llc command","llc") ,("LLVM opt command","opt") ,("Project version","7.8.3") ,("Booter version","7.6.3") ,("Stage","2") ,("Build platform","x86_64-apple-darwin") ,("Host platform","x86_64-apple-darwin") ,("Target platform","x86_64-apple-darwin") ,("Have interpreter","YES") ,("Object splitting supported","NO") ,("Have native code generator","YES") ,("Support SMP","YES") ,("Tables next to code","YES") ,("RTS ways","l debug thr thr_debug thr_l thr_p dyn debug_dyn thr_dyn thr_debug_dyn l_dyn thr_l_dyn") ,("Support dynamic-too","YES") ,("Support parallel --make","YES") ,("Dynamic by default","NO") ,("GHC Dynamic","YES") ,("Leading underscore","YES") ,("Debug on","False") ,("LibDir","/usr/local/lib/ghc-7.8.3") ,("Global Package DB","/usr/local/lib/ghc-7.8.3/package.conf.d") ] }}} $ gcc --version {{{ gcc (GCC) 4.9.0 20140302 (experimental) Copyright (C) 2014 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. }}} Please let me know if there's more I can do to help. I'd be willing to try and track down the issue myself, but I'm afraid I know next to nothing about ghc and it would probably take a lot more work helping me than it would to fix the issue otherwise. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7655#comment:30> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8407: Module re-exports at the package level
by GHC 26 Jul '14

26 Jul '14

#8407: Module re-exports at the package level ------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Package system | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- For various package reorganization purposes, especially for possibly turning `base` into a shim package that re-exports some modules from more specialized packages, good support for module re-exports would be nice. I wrote up a design spec at ModuleReexports; this bug is to track the progress. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8407> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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