November 2015 - ghc-tickets

Re: [GHC] #7298: GHCi is setting stdin/stdout to NoBuffering in runghc when DYNAMIC_GHC_PROGRAMS=YES
by GHC 23 Nov '15

23 Nov '15

#7298: GHCi is setting stdin/stdout to NoBuffering in runghc when DYNAMIC_GHC_PROGRAMS=YES -------------------------------------+------------------------------------- Reporter: igloo | Owner: Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: GHCi | Version: 7.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | ghc-e/should_run/T2228 Blocked By: | Blocking: Related Tickets: #2228 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * milestone: => 8.2.1 Comment: While it's a bit late to handle this for 8.0 let's at least try for 8.2. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7298#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #11119: WERROR in build.mk doesn't work
by GHC 23 Nov '15

23 Nov '15

#11119: WERROR in build.mk doesn't work -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.11 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- There is a line in `build.mk.sample` that suggests setting `WERROR=-Werror` will turn warnings into errors. This used to work. But now it doesn't, as confirmed by examining the command using `V=1`. I believe the change happened in the last 2-3 weeks. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11119> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7253: Top-level bindings in ghci
by GHC 23 Nov '15

23 Nov '15

#7253: Top-level bindings in ghci -------------------------------------+------------------------------------- Reporter: Feuerbach | Owner: roshats Type: feature request | Status: closed Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.6.1 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1299 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => closed * resolution: => fixed -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7253#comment:13> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #11060: Failing tests on 32 bit platforms
by GHC 23 Nov '15

23 Nov '15

#11060: Failing tests on 32 bit platforms -------------------------------------+------------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Test Suite | Version: 7.11 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Other Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- On 32 bit PowerPC and Arm I've been getting about 20 new test failures (starting about a week ago). For example: {{{ --- ./simplCore/should_compile/T8274.stdout.normalised +++ ./simplCore/should_compile/T8274.run.stdout.normalised @@ -1,10 +1,10 @@ T8274.$trModule2 = TrNameS "main"# T8274.$trModule1 = TrNameS "T8274"# T8274.$tcP1 = TrNameS "P"# - 11095028091707994303## - 9476557054198009608## + 11095028091707994303L## + 9476557054198009608L## T8274.$tcN1 = TrNameS "N"# - 7479687563082171902## - 17616649989360543185## + 7479687563082171902L## + 17616649989360543185L## p = T8274.Positives 42# 4.23# 4.23## '4'# 4## n = T8274.Negatives -4# -4.0# -4.0## \ No newline at end of file *** unexpected failure for T8274(normal) }}} This is simply a matter of a difference between the expected output `123##` vs `123L##`. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11060> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #4012: Compilation results are not deterministic
by GHC 23 Nov '15

23 Nov '15

#4012: Compilation results are not deterministic -------------------------------------+------------------------------------- Reporter: kili | Owner: niteria Type: bug | Status: patch Priority: high | Milestone: 8.0.1 Component: Compiler | Version: 6.12.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: #10424 | Differential Rev(s): Phab:D910, | Phab:D1073, Phab:D1133, Phab:D1192, | Phab:D1268, Phab:D1360, Phab:D1373, | Phab:D1396, Phab:D1457, Phab:D1468, Wiki Page: | Phab:D1487, Phab:D1504, Phab:D1508 -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"6393dd8e437f68856b2e7889e576ed1bfb0a9678/ghc" 6393dd8/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="6393dd8e437f68856b2e7889e576ed1bfb0a9678" Make abstractVars deterministic in SetLevel This fixes a non-determinism bug where depending on the order of uniques allocated, the type variables would be in a different order when abstracted for the purpose of lifting out an expression. Test Plan: I've added a new testcase that reproduces the problem ./validate Reviewers: simonmar, austin, bgamari, simonpj Reviewed By: simonpj Subscribers: nomeata, thomie Differential Revision: https://phabricator.haskell.org/D1504 GHC Trac Issues: #4012 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4012#comment:134> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #11124: GHC does not shadow -package-name/-this-package-key
by GHC 22 Nov '15

22 Nov '15

#11124: GHC does not shadow -package-name/-this-package-key -------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Package | Version: 7.11 system | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: GHC accepts Unknown/Multiple | invalid program Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Steps to reproduce: 1. Install a package named `a` with these contents: **a.cabal** {{{ name: a version: 0.1.0.0 cabal-version: >=1.10 library exposed-modules: A build-depends: base }}} **A.hs** {{{ module A where data A = A String }}} Note what unit ID/package key/package name the package installs as. On GHC 7.8 it will be something like `a-0.1.0.0`, on GHC 7.10 it will be something like `a_LKCPrTJwOTOLk4OU37YmeN`, on GHC 8.0 it will be something like `a-0.1.0.0-LKCPrTJwOTOLk4OU37Yme`. 2. Install a package named `b` with these contents: **b.cabal** {{{ name: b version: 0.1.0.0 cabal-version: >=1.10 library exposed-modules: B build-depends: base, a }}} **b.hs** {{{ module B where import A b = A "foo" }}} 3. Go back to `a`, and load `A.hs` in GHCi with `ghci A.hs -package-name a-0.1.0.0 -package-db ../db`. Notice that we can `import B` from this GHCi session: {{{ ezyang@sabre:~/Dev/labs/ii/a$ ghci A.hs -package-name a-0.1.0.0 -package- db ../db GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. [1 of 1] Compiling A ( A.hs, interpreted ) Ok, modules loaded: A. *A> import B *A B> b Loading package a-0.1.0.0 ... linking ... done. Loading package b-0.1.0.0 ... linking ... done. A "asdfsdf" *A B> Leaving GHCi. }}} 3. Edit `A.hs` so that now contains: {{{ module A where data A = A Int }}} 4. Load in GHCi again: {{{ ezyang@sabre:~/Dev/labs/ii/a$ ghci A.hs -package-name a-0.1.0.0 -package- db ../db GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. [1 of 1] Compiling A ( A.hs, interpreted ) Ok, modules loaded: A. *A> import B *A B> b Loading package a-0.1.0.0 ... linking ... done. Loading package b-0.1.0.0 ... linking ... done. A 3458765062984598387 }}} Disaster! Actually, this bug is relatively harmless: 1. If you try to actually reinstall package a, that's a "dangerous" reinstall and it's known that reinstalls can break things. 2. It's hard to convince Cabal to trigger this, since importing `B` requires `b` in the build-depends, and that would constitute a circular package dependency. (You can't separate it out because of (1)) 3. If you don't specify `-package-name` (or similar) the local `A` and the remote `A` will have different identities, no problem. 4. When you do specify `-package-name`, you can't build a main executable (so the only way to run is by loading into GHCi, as shown above.) 5. Sometimes, GHCi will notice that something is amiss if it tries to load the object file for both the remote A and the local A. But the fix seems simple: if a user specifies `-package-name`, it should be AS IF they also specified `-ignore-package`. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11124> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2940: Do CSE after CorePrep
by GHC 22 Nov '15

22 Nov '15

#2940: Do CSE after CorePrep -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: lowest | Milestone: 8.0.1 Component: Compiler | Version: 6.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by osa1): * cc: osa1 (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2940#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2940: Do CSE after CorePrep
by GHC 22 Nov '15

22 Nov '15

#2940: Do CSE after CorePrep -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: lowest | Milestone: 8.0.1 Component: Compiler | Version: 6.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by slyfox): * cc: slyfox (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2940#comment:15> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5344: CSE should look through coercions
by GHC 22 Nov '15

22 Nov '15

#5344: CSE should look through coercions -------------------------------------+------------------------------------- Reporter: reinerp | Owner: simonpj Type: feature request | Status: new Priority: normal | Milestone: ⊥ Component: Compiler | Version: 7.0.3 Resolution: | Keywords: cse Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by slyfox): * cc: slyfox (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5344#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #11109: build broken in libffi/ when `install-sh` is used
by GHC 22 Nov '15

22 Nov '15

#11109: build broken in libffi/ when `install-sh` is used -------------------------------------+------------------------------------- Reporter: hvr | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Build System | Version: 7.10.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- If the `/usr/bin/install` tool is missing or not deemed usable by Autoconf, `install-sh` is used. However, GHC's build then fails with {{{ ... ===--- building final phase make --no-print-directory -f ghc.mk phase=final all rts/ghc.mk:543: rts/dist/build/.depend-v-dyn-l-debug-thr-thr_debug-thr_l- debug_dyn-thr_dyn-thr_debug_dyn-l_dyn-thr_l_dyn.c_asm: No such file or directory compiler/ghc.mk:661: compiler/stage2/build/.depend-v-dyn.haskell: No such file or directory make -C libffi/build MAKEFLAGS= install MAKE x86_64-unknown-linux-gnu : 0 * install make[3]: Entering directory '/home/hvr/Haskell/GHC/ghc/libffi/build/x86_64 -unknown-linux-gnu' Making install in include make[4]: Entering directory '/home/hvr/Haskell/GHC/ghc/libffi/build/x86_64 -unknown-linux-gnu/include' make[5]: Entering directory '/home/hvr/Haskell/GHC/ghc/libffi/build/x86_64 -unknown-linux-gnu/include' make[5]: Nothing to be done for 'install-exec-am'. /bin/mkdir -p '/home/hvr/Haskell/GHC/ghc/libffi/build/inst/lib/libffi-3.1/include' ../install-sh -c -m 644 ffi.h ffitarget.h '/home/hvr/Haskell/GHC/ghc/libffi/build/inst/lib/libffi-3.1/include' /bin/bash: line 11: ../install-sh: No such file or directory Makefile:361: recipe for target 'install-nodist_includesHEADERS' failed make[5]: *** [install-nodist_includesHEADERS] Error 127 make[5]: Leaving directory '/home/hvr/Haskell/GHC/ghc/libffi/build/x86_64 -unknown-linux-gnu/include' Makefile:477: recipe for target 'install-am' failed make[4]: *** [install-am] Error 2 make[4]: Leaving directory '/home/hvr/Haskell/GHC/ghc/libffi/build/x86_64 -unknown-linux-gnu/include' Makefile:1577: recipe for target 'install-recursive' failed make[3]: *** [install-recursive] Error 1 make[3]: Leaving directory '/home/hvr/Haskell/GHC/ghc/libffi/build/x86_64 -unknown-linux-gnu' Makefile:3095: recipe for target 'install' failed make[2]: *** [install] Error 2 libffi/ghc.mk:116: recipe for target 'libffi/stamp.ffi.static- shared.install' failed make[1]: *** [libffi/stamp.ffi.static-shared.install] Error 2 Makefile:121: recipe for target 'all' failed make: *** [all] Error 2 }}} This can be easily simulated on Linux by temporarily renaming `/usr/bin/install` -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11109> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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