8000 Possible incorrect rule implementation. · Issue #528 · chalk-lab/Mooncake.jl · GitHub
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Possible incorrect rule implementation. #528

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AstitvaAggarwal opened this issue Mar 17, 2025 · 3 comments
Open

Possible incorrect rule implementation. #528

AstitvaAggarwal opened this issue Mar 17, 2025 · 3 comments
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@AstitvaAggarwal
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AstitvaAggarwal commented Mar 17, 2025 •
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When i call Mooncake.prepare_pullback_cache(x->Ptr{Float64}(x), 1)

I get the following Error and Stacktrace :


ERROR: TypeError: in typeassert, expected Mooncake.CoDual{Ptr{Float64}, Ptr{Float64}}, got a value of type Mooncake.CoDual{Ptr{Float64}, Mooncake.NoFData}

Stacktrace:
 [1] #25
   @ .\REPL[208]:1 [inlined]
 [2] (::Tuple{…})(none::Mooncake.CoDual{…}, none::Mooncake.CoDual{…})
   @ Base.Experimental .\<missing>:0
 [3] (::Mooncake.DerivedRule{…})(::Mooncake.CoDual{…}, ::Mooncake.CoDual{…})
   @ Mooncake C:\Users\astit\OneDrive\Desktop\GSOC\Julia\contri\Mooncake.jl\src\interpreter\s2s_reverse_mode_ad.jl:963
 [4] prepare_pullback_cache(::Function, ::Vararg{Any}; kwargs::@Kwargs{})
   @ Mooncake C:\Users\astit\OneDrive\Desktop\GSOC\Julia\contri\Mooncake.jl\src\interface.jl:279
 [5] prepare_pullback_cache(::Function, ::Vararg{Any})
   @ Mooncake C:\Users\astit\OneDrive\Desktop\GSOC\Julia\contri\Mooncake.jl\src\interface.jl:270
 [6] top-level scope
   @ REPL[208]:1
Some type information was truncated. Use `show(err)` to see complete types.

julia> show(err)
1-element ExceptionStack:
TypeError: in typeassert, expected Mooncake.CoDual{Ptr{Float64}, Ptr{Float64}}, got a value of type Mooncake.CoDual{Ptr{Float64}, Mooncake.NoFData}
Stacktrace:
  [1] #13
    @ .\REPL[147]:1 [inlined]
  [2] (::Tuple{Mooncake.Stack{Int32}, Base.RefValue{Tuple{Mooncake.LazyZeroRData{var"#13#14", Nothing}, Mooncake.LazyZeroRData{Int64, Nothing}}}})(none::Mooncake.CoDual{var"#13#14", Mooncake.NoFData}, none::Mooncake.CoDual{Int64, Mooncake.NoFData})
    @ Base.Experimental .\<missing>:0
  [3] (::Mooncake.DerivedRule{Tuple{var"#13#14", Int64}, Tuple{Mooncake.CoDual{var"#13#14", Mooncake.NoFData}, Mooncake.CoDual{Int64, Mooncake.NoFData}}, Mooncake.CoDual{Ptr{Float64}, Ptr{Float64}}, Tuple{Mooncake.NoRData}, Tuple{Mooncake.NoRData, Mooncake.NoRData}, false, Val{2}})(::Mooncake.CoDual{var"#13#14", Mooncake.NoFData}, ::Mooncake.CoDual{Int64, Mooncake.NoFData})
    @ Mooncake C:\Users\astit\OneDrive\Desktop\GSOC\Julia\contri\Mooncake.jl\src\interpreter\s2s_reverse_mode_ad.jl:963
  [4] prepare_pullback_cache(::Function, ::Vararg{Any}; kwargs::@Kwargs{})
    @ Mooncake C:\Users\astit\OneDrive\Desktop\GSOC\Julia\contri\Mooncake.jl\src\interface.jl:304
  [5] prepare_pullback_cache(::Function, ::Vararg{Any})
    @ Mooncake C:\Users\astit\OneDrive\Desktop\GSOC\Julia\contri\Mooncake.jl\src\interface.jl:294
  [6] top-level scope
    @ REPL[147]:1
  [7] eval
    @ .\boot.jl:385 [inlined]
  [8] eval
    @ .\Base.jl:88 [inlined]
  [9] repleval(m::Module, code::Expr, ::String)
    @ VSCodeServer c:\Users\astit\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\repl.jl:229
 [10] (::VSCodeServer.var"#112#114"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer c:\Users\astit\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\repl.jl:192
 [11] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging .\logging.jl:515
 [12] with_logger
    @ .\logging.jl:627 [inlined]
 [13] (::VSCodeServer.var"#111#113"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer c:\Users\astit\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\repl.jl:193
 [14] #invokelatest#2
    @ .\essentials.jl:892 [inlined]
 [15] invokelatest(::Any)
    @ Base .\essentials.jl:889
 [16] (::VSCodeServer.var"#64#65")()
    @ VSCodeServer c:\Users\astit\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\eval.jl:34
julia>
@AstitvaAggarwal AstitvaAggarwal added the bug Something isn't working label Mar 17, 2025
@willtebbutt
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Thanks for opening this @AstitvaAggarwal . Would you mind sharing the stacktrace that you get when you call show(err) -- we need quite a bit more information from the types in order to see what's going on.

@AstitvaAggarwal
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@willtebbutt ive edited that into the REPL output above, take a look.

@willtebbutt
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Thanks @AstitvaAggarwal . This definitely looks like a bug. I'll have a dig later to try and figure out where this is coming from.

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