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inference: fix istuple check in apply_type_tfunc #52585

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merged 1 commit into from
Dec 20, 2023
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inference: fix istuple check in apply_type_tfunc #52585

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2 changes: 1 addition & 1 deletion base/compiler/tfuncs.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -1743,7 +1743,7 @@ const _tvarnames = Symbol[:_A, :_B, :_C, :_D, :_E, :_F, :_G, :_H, :_I, :_J, :_K,
end
return allconst ? Const(ty) : Type{ty}
end
istuple = isa(headtype, Type) && (headtype == Tuple)
istuple = headtype === Tuple
if !istuple && !isa(headtype, UnionAll) && !isvarargtype(headtype)
return Union{}
end
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5 changes: 5 additions & 0 deletions test/compiler/inference.jl
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Expand Up @@ -5609,3 +5609,8 @@ let x = 1, _Any = Any
foo27031() = bar27031((x, 1.0), Val{_Any})
@test foo27031() == "OK"
end

# Issue #51927
let 𝕃 = Core.Compiler.fallback_lattice
@test apply_type_tfunc(𝕃, Const(Tuple{Vararg{Any,N}} where N), Int) == Type{NTuple{_A, Any}} where _A
end