[GHC] #13994: STG lint failure on master
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.3 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: -------------------------------------+------------------------------------- As of 4700baaf8f9bf3c44a53a595d840c7c14cfd6f98 building with this `build.mk` results in an STG lint failure, {{{ BuildFlavour = devel2 include mk/flavours/$(BuildFlavour).mk GhcLibHcOpts += -g3 -ddump-to-file -ddump-stg -dcore-lint -dstg-lint -dcmm-lint GhcRtsHcOpts += -g3 GhcStage2HcOpts += -g3 -ddump-to-file -ddump-stg -dcore-lint -dstg-lint -dcmm-lint }}} The failures occurs while building `libraries/integer-gmp/dist- install/build/GHC/Integer/Type.o` and are of the form, {{{ *** Stg Lint ErrMsgs: in Stg2Stg *** <no location info>: warning: [in body of lambda with binders m0_scBi :: State# s_a2Ej -> State# s_a2Ej, s1_scBj :: State# s_a2Ej] s'_scBk is out of scope <no location info>: warning: [RHS of $j1_sdij :: (# BigNat, GmpLimb# #)] Let(rec) binder ‘$j1_sdij’ has unlifted type ‘(# BigNat, GmpLimb# #)’ RHS: (elided for brevity) <no location info>: warning: [RHS of $j4_sdQ1 :: (# BigNat, BigNat #)] Let(rec) binder ‘$j4_sdQ1’ has unlifted type ‘(# BigNat, BigNat #)’ RHS: (elided) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: stg-lint Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * keywords: => stg-lint -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: stg-lint Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * priority: high => highest Comment: We should verify that this is fixed before the release. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: stg-lint 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 osa1): I get a different error when I use your `build.mk` with latest master branch: {{{ "inplace/bin/ghc-stage1" -hisuf hi -osuf o -hcsuf hc -static -O -H64m -Wall -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -this-unit-id ghc-8.5 -hide-all- packages -i -icompiler/backpack -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen -icompiler/parser -icompiler/prelude -icompiler/profiling -icompiler/rename -icompiler/simplCore -icompiler/simplStg -icompiler/specialise -icompiler/stgSyn -icompiler/stranal -icompiler/typecheck -icompiler/types -icompiler/utils -icompiler/vectorise -icompiler/stage2/build -Icompiler/stage2/build -icompiler/stage2/build/./autogen -Icompiler/stage2/build/./autogen -Icompiler/. -Icompiler/parser -Icompiler/utils -Icompiler/../rts/dist/build -Icompiler/stage2 -optP-DGHCI -optP-include -optPcompiler/stage2/build/./autogen/cabal_macros.h -package-id array-0.5.2.0 -package-id base-4.11.0.0 -package-id binary-0.8.5.1 -package-id bytestring-0.10.8.2 -package-id containers-0.5.11.0 -package- id deepseq-1.4.3.0 -package-id directory-1.3.1.5 -package-id filepath-1.4.1.2 -package-id ghc-boot-8.5 -package-id ghc-boot-th-8.5 -package-id ghci-8.5 -package-id hpc-0.6.0.3 -package-id process-1.6.2.0 -package-id template-haskell-2.13.0.0 -package-id terminfo-0.4.1.1 -package-id time-1.8.0.2 -package-id transformers-0.5.5.0 -package-id unix-2.7.2.2 -Wall -Wno-name-shadowing -Wnoncanonical-monad-instances -Wnoncanonical-monadfail-instances -Wnoncanonical-monoid-instances -this- unit-id ghc -XHaskell2010 -XNoImplicitPrelude -optc-DTHREADED_RTS -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -Rghc-timing -O0 -DDEBUG -g3 -ddump- to-file -ddump-stg -dcore-lint -dstg-lint -dcmm-lint -Wcpp-undef -no-user- package-db -rtsopts -Wnoncanonical-monad-instances -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir compiler/stage2/build -dynamic-too -c compiler/utils/FastString.hs -o compiler/stage2/build/FastString.o -dyno compiler/stage2/build/FastString.dyn_o ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.5.20180206 for x86_64-unknown-linux): kindPrimRep RuntimeRep typePrimRep ('IntRep :: RuntimeRep) Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable pprPanic, called at compiler/simplStg/RepType.hs:346:5 in ghc:RepType Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} Interestingly if I remove `-dstg-lint` parameter it compiles fine. So it seems like there still is a problem with `StgLint`, but maybe a different one than the original error. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: stg-lint Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4396 Wiki Page: | -------------------------------------+------------------------------------- Changes (by osa1): * differential: => Phab:D4396 Comment: StgLint is still broken in other ways but I fixed the problem mentioned in comment:3 in Phab:D4396. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: stg-lint Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4396 Wiki Page: | -------------------------------------+------------------------------------- Comment (by osa1): After Phab:D4396 it's failing in `GHC.Integer.Type`. This time the problem is we have in scrutinee position an unboxed tuple (pair) with `State#` as second argument, but binder becomes `Unit#` after unarise becuase `State#` has no representation in runtime. Error message: {{{ ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.5.20180207 for x86_64-unknown-linux): ASSERT failed! dataConInstArgTys Unit# [k0_10, a_11] ['TupleRep '[], 'LiftedRep, State# s_a2Hq, a_a2Hr] Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable pprPanic, called at compiler/utils/Outputable.hs:1206:5 in ghc:Outputable assertPprPanic, called at compiler/basicTypes/DataCon.hs:1255:76 in ghc:DataCon Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} I look into this in more detail later. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: stg-lint Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #14787 | Differential Rev(s): Phab:D4404 Wiki Page: | -------------------------------------+------------------------------------- Changes (by osa1): * differential: Phab:D4396 => Phab:D4404 * related: => #14787 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13994: STG lint failure on master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: closed Priority: highest | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Resolution: fixed | Keywords: stg-lint Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #14787 | Differential Rev(s): Phab:D4404 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => closed * resolution: => fixed Comment: This was resolved via #14787. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13994#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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