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Recursive concept that has a function with the same name as an existing one causes compiler to read from nil #24039

Open
fabricio-p opened this issue Sep 1, 2024 · 3 comments
Open

Recursive concept that has a function with the same name as an existing one causes compiler to read from nil #24039

fabricio-p opened this issue Sep 1, 2024 · 3 comments
Labels
Compiler Crash Concepts Error Messages

Comments

@fabricio-p
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Description

proc x(y: int): string = discard

type
  C = concept
    proc x(y: C): int
  A[T: C] = tuple
    x: T
  B*[T: C] = object
    a: A[T]

Nim Version

Nim Compiler Version 2.0.8 [Linux: amd64]
Compiled at 2024-08-20
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: 5935c3b
active boot switches:

Current Output

Hint: used config file '/home/fabricio/projects/third-party/Nim/config/nim.cfg' [Conf]
Hint: used config file '/home/fabricio/projects/third-party/Nim/config/config.nims' [Conf]
......................................................................Traceback (most recent call last)
/home/fabricio/projects/third-party/Nim/compiler/nim.nim(164) nim
/home/fabricio/projects/third-party/Nim/compiler/nim.nim(119) handleCmdLine
/home/fabricio/projects/third-party/Nim/compiler/main.nim(307) mainCommand
/home/fabricio/projects/third-party/Nim/compiler/main.nim(276) compileToBackend
/home/fabricio/projects/third-party/Nim/compiler/main.nim(138) commandCompileToC
/home/fabricio/projects/third-party/Nim/compiler/pipelines.nim(299) compilePipelineProject
/home/fabricio/projects/third-party/Nim/compiler/pipelines.nim(226) compilePipelineModule
/home/fabricio/projects/third-party/Nim/compiler/pipelines.nim(173) processPipelineModule
/home/fabricio/projects/third-party/Nim/compiler/sem.nim(867) semWithPContext
/home/fabricio/projects/third-party/Nim/compiler/sem.nim(836) semStmtAndGenerateGenerics
/home/fabricio/projects/third-party/Nim/compiler/semstmts.nim(2689) semStmt
/home/fabricio/projects/third-party/Nim/compiler/semexprs.nim(1182) semExprNoType
/home/fabricio/projects/third-party/Nim/compiler/semexprs.nim(3323) semExpr /home/fabricio/projects/nim/bug.nim(1, 1) nkStmtList
/home/fabricio/projects/third-party/Nim/lib/system.nim(937) semStmtList
/home/fabricio/projects/third-party/Nim/compiler/semexprs.nim(3328) semExpr /home/fabricio/projects/nim/bug.nim(4, 3) nkTypeSection
/home/fabricio/projects/third-party/Nim/compiler/semstmts.nim(1673) semTypeSection
/home/fabricio/projects/third-party/Nim/compiler/semstmts.nim(1442) typeSectionRightSidePass
/home/fabricio/projects/third-party/Nim/compiler/semtypes.nim(2139) semTypeNode
/home/fabricio/projects/third-party/Nim/compiler/semtypes.nim(965) semObjectNode
/home/fabricio/projects/third-party/Nim/compiler/semtypes.nim(812) semRecordNodeAux
/home/fabricio/projects/third-party/Nim/compiler/semtypes.nim(828) semRecordNodeAux
/home/fabricio/projects/third-party/Nim/compiler/semtypes.nim(2066) semTypeNode
/home/fabricio/projects/third-party/Nim/compiler/semtypes.nim(1563) semGeneric
/home/fabricio/projects/third-party/Nim/compiler/sigmatch.nim(2702) matches
/home/fabricio/projects/third-party/Nim/compiler/sigmatch.nim(2642) matchesAux
/home/fabricio/projects/third-party/Nim/compiler/sigmatch.nim(2347) paramTypesMatch
/home/fabricio/projects/third-party/Nim/compiler/sigmatch.nim(2177) paramTypesMatchAux
/home/fabricio/projects/third-party/Nim/compiler/sigmatch.nim(1787) typeRel
/home/fabricio/projects/third-party/Nim/compiler/sigmatch.nim(1743) typeRel
/home/fabricio/projects/third-party/Nim/compiler/concepts.nim(325) conceptMatch
/home/fabricio/projects/third-party/Nim/compiler/concepts.nim(290) conceptMatchNode
/home/fabricio/projects/third-party/Nim/compiler/concepts.nim(298) conceptMatchNode
/home/fabricio/projects/third-party/Nim/compiler/concepts.nim(281) matchSyms
/home/fabricio/projects/third-party/Nim/compiler/concepts.nim(256) matchSym
/home/fabricio/projects/third-party/Nim/compiler/concepts.nim(182) matchType
/home/fabricio/projects/third-party/Nim/compiler/ast.nim lastSon
SIGSEGV: Illegal storage access. (Attempt to read from nil?)

Expected Output

Hint: used config file '/home/fabricio/projects/third-party/Nim/config/nim.cfg' [Conf]
Hint: used config file '/home/fabricio/projects/third-party/Nim/config/config.nims' [Conf]
......................................................................
CC: ../third-party/Nim/lib/system/exceptions.nim
CC: ../third-party/Nim/lib/std/private/since.nim
CC: ../third-party/Nim/lib/system/ctypes.nim
CC: ../third-party/Nim/lib/std/sysatomics.nim
CC: ../third-party/Nim/lib/system/ansi_c.nim
CC: ../third-party/Nim/lib/system/memory.nim
CC: ../third-party/Nim/lib/std/private/syslocks.nim
CC: ../third-party/Nim/lib/std/private/threadtypes.nim
CC: ../third-party/Nim/lib/std/private/digitsutils.nim
CC: ../third-party/Nim/lib/std/private/miscdollars.nim
CC: ../third-party/Nim/lib/std/assertions.nim
CC: ../third-party/Nim/lib/system/iterators.nim
CC: ../third-party/Nim/lib/system/coro_detection.nim
CC: ../third-party/Nim/lib/std/private/dragonbox.nim
CC: ../third-party/Nim/lib/std/private/schubfach.nim
CC: ../third-party/Nim/lib/std/formatfloat.nim
CC: ../third-party/Nim/lib/std/objectdollar.nim
CC: ../third-party/Nim/lib/system/dollars.nim
CC: ../third-party/Nim/lib/std/typedthreads.nim
CC: ../third-party/Nim/lib/system/stacktraces.nim
CC: ../third-party/Nim/lib/std/private/bitops_utils.nim
CC: ../third-party/Nim/lib/system/countbits_impl.nim
CC: ../third-party/Nim/lib/system/repr_v2.nim
CC: ../third-party/Nim/lib/std/widestrs.nim
CC: ../third-party/Nim/lib/std/syncio.nim
CC: ../third-party/Nim/lib/system.nim
CC: bug.nim
Hint:  [Link]
Hint: mm: orc; threads: on; opt: none (DEBUG BUILD, `-d:release` generates faster code)
27785 lines; 1.420s; 30.406MiB peakmem; proj: /home/fabricio/projects/nim/bug.nim; out: /home/fabricio/.cache/nim/bug_d/bug_39498606B2F6B94C1188035595434CAE17A4CF94 [SuccessX]
Hint: /home/fabricio/.cache/nim/bug_d/bug_39498606B2F6B94C1188035595434CAE17A4CF94 [Exec]

Known Workarounds

No response

Additional Information

No response
@juancarlospaco
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Collaborator

!nim c

proc x(y: int): string = discard

type
  C = concept
    proc x(y: C): int
  A[T: C] = tuple
    x: T
  B*[T: C] = object
    a: A[T]

@github-actions GitHub Actions
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Contributor

github-actions bot commented Sep 1, 2024

🐧 Linux bisect by @juancarlospaco (collaborator)
devel 👎 FAIL

Output

IR

Compiled filesize 0 (0 bytes) 


Stats
    

  • Started	2024-09-01T16:11:04

  • Finished	2024-09-01T16:11:04

  • Duration	


AST


nnkStmtList.newTree(
  nnkProcDef.newTree(
    newIdentNode("x"),
    newEmptyNode(),
    newEmptyNode(),
    nnkFormalParams.newTree(
      newIdentNode("string"),
      nnkIdentDefs.newTree(
        newIdentNode("y"),
        newIdentNode("int"),
        newEmptyNode()
      )
    ),
    newEmptyNode(),
    newEmptyNode(),
    nnkStmtList.newTree(
      nnkDiscardStmt.newTree(
        newEmptyNode()
      )
    )
  ),
  nnkTypeSection.newTree(
    nnkTypeDef.newTree(
      newIdentNode("C"),
      newEmptyNode(),
      nnkTypeClassTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        newEmptyNode(),
        nnkStmtList.newTree(
          nnkProcDef.newTree(
            newIdentNode("x"),
            newEmptyNode(),
            newEmptyNode(),
            nnkFormalParams.newTree(
              newIdentNode("int"),
              nnkIdentDefs.newTree(
                newIdentNode("y"),
                newIdentNode("C"),
                newEmptyNode()
              )
            ),
            newEmptyNode(),
            newEmptyNode(),
            newEmptyNode()
          )
        )
      )
    ),
    nnkTypeDef.newTree(
      newIdentNode("A"),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkTupleTy.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("x"),
          newIdentNode("T"),
          newEmptyNode()
        )
      )
    ),
    nnkTypeDef.newTree(
      nnkPostfix.newTree(
        newIdentNode("*"),
        newIdentNode("B")
      ),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkObjectTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        nnkRecList.newTree(
          nnkIdentDefs.newTree(
            newIdentNode("a"),
            nnkBracketExpr.newTree(
              newIdentNode("A"),
              newIdentNode("T")
            ),
            newEmptyNode()
          )
        )
      )
    )
  )
)




stable	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:08

  • Finished	2024-09-01T16:11:09

  • Duration	


AST


nnkStmtList.newTree(
  nnkProcDef.newTree(
    newIdentNode("x"),
    newEmptyNode(),
    newEmptyNode(),
    nnkFormalParams.newTree(
      newIdentNode("string"),
      nnkIdentDefs.newTree(
        newIdentNode("y"),
        newIdentNode("int"),
        newEmptyNode()
      )
    ),
    newEmptyNode(),
    newEmptyNode(),
    nnkStmtList.newTree(
      nnkDiscardStmt.newTree(
        newEmptyNode()
      )
    )
  ),
  nnkTypeSection.newTree(
    nnkTypeDef.newTree(
      newIdentNode("C"),
      newEmptyNode(),
      nnkTypeClassTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        newEmptyNode(),
        nnkStmtList.newTree(
          nnkProcDef.newTree(
            newIdentNode("x"),
            newEmptyNode(),
            newEmptyNode(),
            nnkFormalParams.newTree(
              newIdentNode("int"),
              nnkIdentDefs.newTree(
                newIdentNode("y"),
                newIdentNode("C"),
                newEmptyNode()
              )
            ),
            newEmptyNode(),
            newEmptyNode(),
            newEmptyNode()
          )
        )
      )
    ),
    nnkTypeDef.newTree(
      newIdentNode("A"),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkTupleTy.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("x"),
          newIdentNode("T"),
          newEmptyNode()
        )
      )
    ),
    nnkTypeDef.newTree(
      nnkPostfix.newTree(
        newIdentNode("*"),
        newIdentNode("B")
      ),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkObjectTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        nnkRecList.newTree(
          nnkIdentDefs.newTree(
            newIdentNode("a"),
            nnkBracketExpr.newTree(
              newIdentNode("A"),
              newIdentNode("T")
            ),
            newEmptyNode()
          )
        )
      )
    )
  )
)




2.0.8	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:09

  • Finished	2024-09-01T16:11:09

  • Duration	


AST


nnkStmtList.newTree(
  nnkProcDef.newTree(
    newIdentNode("x"),
    newEmptyNode(),
    newEmptyNode(),
    nnkFormalParams.newTree(
      newIdentNode("string"),
      nnkIdentDefs.newTree(
        newIdentNode("y"),
        newIdentNode("int"),
        newEmptyNode()
      )
    ),
    newEmptyNode(),
    newEmptyNode(),
    nnkStmtList.newTree(
      nnkDiscardStmt.newTree(
        newEmptyNode()
      )
    )
  ),
  nnkTypeSection.newTree(
    nnkTypeDef.newTree(
      newIdentNode("C"),
      newEmptyNode(),
      nnkTypeClassTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        newEmptyNode(),
        nnkStmtList.newTree(
          nnkProcDef.newTree(
            newIdentNode("x"),
            newEmptyNode(),
            newEmptyNode(),
            nnkFormalParams.newTree(
              newIdentNode("int"),
              nnkIdentDefs.newTree(
                newIdentNode("y"),
                newIdentNode("C"),
                newEmptyNode()
              )
            ),
            newEmptyNode(),
            newEmptyNode(),
            newEmptyNode()
          )
        )
      )
    ),
    nnkTypeDef.newTree(
      newIdentNode("A"),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkTupleTy.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("x"),
          newIdentNode("T"),
          newEmptyNode()
        )
      )
    ),
    nnkTypeDef.newTree(
      nnkPostfix.newTree(
        newIdentNode("*"),
        newIdentNode("B")
      ),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkObjectTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        nnkRecList.newTree(
          nnkIdentDefs.newTree(
            newIdentNode("a"),
            nnkBracketExpr.newTree(
              newIdentNode("A"),
              newIdentNode("T")
            ),
            newEmptyNode()
          )
        )
      )
    )
  )
)




2.0.0	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:13

  • Finished	2024-09-01T16:11:13

  • Duration	


AST


nnkStmtList.newTree(
  nnkProcDef.newTree(
    newIdentNode("x"),
    newEmptyNode(),
    newEmptyNode(),
    nnkFormalParams.newTree(
      newIdentNode("string"),
      nnkIdentDefs.newTree(
        newIdentNode("y"),
        newIdentNode("int"),
        newEmptyNode()
      )
    ),
    newEmptyNode(),
    newEmptyNode(),
    nnkStmtList.newTree(
      nnkDiscardStmt.newTree(
        newEmptyNode()
      )
    )
  ),
  nnkTypeSection.newTree(
    nnkTypeDef.newTree(
      newIdentNode("C"),
      newEmptyNode(),
      nnkTypeClassTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        newEmptyNode(),
        nnkStmtList.newTree(
          nnkProcDef.newTree(
            newIdentNode("x"),
            newEmptyNode(),
            newEmptyNode(),
            nnkFormalParams.newTree(
              newIdentNode("int"),
              nnkIdentDefs.newTree(
                newIdentNode("y"),
                newIdentNode("C"),
                newEmptyNode()
              )
            ),
            newEmptyNode(),
            newEmptyNode(),
            newEmptyNode()
          )
        )
      )
    ),
    nnkTypeDef.newTree(
      newIdentNode("A"),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkTupleTy.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("x"),
          newIdentNode("T"),
          newEmptyNode()
        )
      )
    ),
    nnkTypeDef.newTree(
      nnkPostfix.newTree(
        newIdentNode("*"),
        newIdentNode("B")
      ),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkObjectTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        nnkRecList.newTree(
          nnkIdentDefs.newTree(
            newIdentNode("a"),
            nnkBracketExpr.newTree(
              newIdentNode("A"),
              newIdentNode("T")
            ),
            newEmptyNode()
          )
        )
      )
    )
  )
)




1.6.20	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:16

  • Finished	2024-09-01T16:11:16

  • Duration	


AST


nnkStmtList.newTree(
  nnkProcDef.newTree(
    newIdentNode("x"),
    newEmptyNode(),
    newEmptyNode(),
    nnkFormalParams.newTree(
      newIdentNode("string"),
      nnkIdentDefs.newTree(
        newIdentNode("y"),
        newIdentNode("int"),
        newEmptyNode()
      )
    ),
    newEmptyNode(),
    newEmptyNode(),
    nnkStmtList.newTree(
      nnkDiscardStmt.newTree(
        newEmptyNode()
      )
    )
  ),
  nnkTypeSection.newTree(
    nnkTypeDef.newTree(
      newIdentNode("C"),
      newEmptyNode(),
      nnkTypeClassTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        newEmptyNode(),
        nnkStmtList.newTree(
          nnkProcDef.newTree(
            newIdentNode("x"),
            newEmptyNode(),
            newEmptyNode(),
            nnkFormalParams.newTree(
              newIdentNode("int"),
              nnkIdentDefs.newTree(
                newIdentNode("y"),
                newIdentNode("C"),
                newEmptyNode()
              )
            ),
            newEmptyNode(),
            newEmptyNode(),
            newEmptyNode()
          )
        )
      )
    ),
    nnkTypeDef.newTree(
      newIdentNode("A"),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkTupleTy.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("x"),
          newIdentNode("T"),
          newEmptyNode()
        )
      )
    ),
    nnkTypeDef.newTree(
      nnkPostfix.newTree(
        newIdentNode("*"),
        newIdentNode("B")
      ),
      nnkGenericParams.newTree(
        nnkIdentDefs.newTree(
          newIdentNode("T"),
          newIdentNode("C"),
          newEmptyNode()
        )
      ),
      nnkObjectTy.newTree(
        newEmptyNode(),
        newEmptyNode(),
        nnkRecList.newTree(
          nnkIdentDefs.newTree(
            newIdentNode("a"),
            nnkBracketExpr.newTree(
              newIdentNode("A"),
              newIdentNode("T")
            ),
            newEmptyNode()
          )
        )
      )
    )
  )
)




1.4.8	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:18

  • Finished	2024-09-01T16:11:18

  • Duration	


AST






1.2.18	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:21

  • Finished	2024-09-01T16:11:21

  • Duration	


AST






1.0.10	👎 FAIL
Output






IR
Compiled filesize	0 (0 bytes)



Stats
    

  • Started	2024-09-01T16:11:24

  • Finished	2024-09-01T16:11:24

  • Duration	


AST






Stats
    

  • GCC	11.4.0

  • Clang	14.0.0

  • NodeJS	20.4

  • Created	2024-09-01T16:10:36Z

  • Comments	1

  • Commands	nim c --run  -d:nimDebug -d:nimDebugDlOpen -d:ssl -d:nimDisableCertificateValidation --forceBuild:on --colors:off --verbosity:0 --hints:off --lineTrace:off --nimcache:/home/runner/work/Nim/Nim --out:/home/runner/work/Nim/Nim/temp /home/runner/work/Nim/Nim/temp.nim


🤖 Bug found in 22 mins bisecting 8 commits at 0 commits per second

      		
    

  





        


            

            

              
            

        

      


      

            
  

    
  
    
    

  

  



    












      

  
            







      

  
      



  

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            Araq
  

      

      

      commented


        Sep 2, 2024


      
    


  





      


        


  
    

      
          
Use Self.

      		
    

  





        


            

            

              
            

        

      


      

            
  

    
  
    
    

  

  



    












      

  
            

    

      
    

    


      

          @ringabout
ringabout




            added
      

  Invalid Code Acceptance

  Everything related to compiler not complaining about invalid code

      

  Error Messages


    and removed
      

  Invalid Code Acceptance

  Everything related to compiler not complaining about invalid code

  labels


      Sep 2, 2024

    

  



    











  
  

    

      

  





  




  
  

              

  
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      5 participants
    

    

        
          @Araq 
        
          @juancarlospaco 
        
          @metagn 
        
          @ringabout 
        
          @fabricio-p