[GHC] #14116: Core lint error while compiling master
#14116: Core lint error while compiling master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.2.1 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: -------------------------------------+------------------------------------- While compiling e054c5f06451def4437d9d770ae156f034796c59 with the following `build.mk`, {{{ BuildFlavour = devel2 include mk/flavours/$(BuildFlavour).mk GhcStage2HcOpts += -eventlog GhcStage1HcOpts += -eventlog 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 }}} I encountered this Core lint failure while compiling `PprColour`, {{{ stgEqType: unequal PprColour [Char] ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.3.20170815 for x86_64-unknown-linux): *** Stg Lint ErrMsgs: in Stg2Stg *** compiler/utils/PprColour.hs:62:1: warning: [RHS of defaultScheme :: Scheme] In a RHS constructor application, con type doesn't match arg types: Constructor type: PprColour -> PprColour -> PprColour -> PprColour -> PprColour -> PprColour -> Scheme Arg types: [Char] PprColour String String String String *** Offending Program *** ... }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14116 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14116: Core lint error while compiling master
-------------------------------------+-------------------------------------
Reporter: bgamari | Owner: (none)
Type: bug | Status: new
Priority: high | Milestone:
Component: Compiler | Version: 8.2.1
Resolution: | Keywords:
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 bgamari):
Here is a relevant excerpt from the core program,
{{{#!hs
defaultScheme4_r2S1 :: String
[GblId] =
\u []
src
#14116: STG lint error while compiling master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by bgamari: Old description:
While compiling e054c5f06451def4437d9d770ae156f034796c59 with the following `build.mk`, {{{ BuildFlavour = devel2 include mk/flavours/$(BuildFlavour).mk
GhcStage2HcOpts += -eventlog GhcStage1HcOpts += -eventlog
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 }}}
I encountered this Core lint failure while compiling `PprColour`, {{{ stgEqType: unequal PprColour [Char] ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.3.20170815 for x86_64-unknown-linux): *** Stg Lint ErrMsgs: in Stg2Stg *** compiler/utils/PprColour.hs:62:1: warning: [RHS of defaultScheme :: Scheme] In a RHS constructor application, con type doesn't match arg types: Constructor type: PprColour -> PprColour -> PprColour -> PprColour -> PprColour -> PprColour -> Scheme Arg types: [Char] PprColour String String String String *** Offending Program *** ... }}}
New description: While compiling e054c5f06451def4437d9d770ae156f034796c59 with the following `build.mk`, {{{ BuildFlavour = devel2 include mk/flavours/$(BuildFlavour).mk GhcStage2HcOpts += -eventlog GhcStage1HcOpts += -eventlog 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 }}} I encountered this STG lint failure while compiling `PprColour`, {{{ stgEqType: unequal PprColour [Char] ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.3.20170815 for x86_64-unknown-linux): *** Stg Lint ErrMsgs: in Stg2Stg *** compiler/utils/PprColour.hs:62:1: warning: [RHS of defaultScheme :: Scheme] In a RHS constructor application, con type doesn't match arg types: Constructor type: PprColour -> PprColour -> PprColour -> PprColour -> PprColour -> PprColour -> Scheme Arg types: [Char] PprColour String String String String *** Offending Program *** ... }}} -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14116#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14116: STG lint error while compiling master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: 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 bgamari): It looks like this is really just another bug in STG lint: we fail to look through newtypes despite the fact that we have thrown away casts during Core-to-STG. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14116#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14116: STG lint error while compiling master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: patch Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3856 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => patch * differential: => Phab:D3856 * milestone: => 8.4.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14116#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14116: STG lint error while compiling master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: closed Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.2.1 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3856 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: patch => closed * resolution: => fixed Comment: f17f1063a29452843195c59e6cca2191b9d46c7f fixes this by giving up on checking of types in STG lint. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14116#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14116: STG lint error while compiling master -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: closed Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.2.1 Resolution: fixed | 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:D3856 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * keywords: => stg-lint -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14116#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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