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fix bug in t-function for >: #35136

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Merged
merged 1 commit into from
Mar 18, 2020
Merged

fix bug in t-function for >: #35136

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2 changes: 1 addition & 1 deletion base/compiler/abstractinterpretation.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -851,7 +851,7 @@ function abstract_call_known(@nospecialize(f), fargs::Union{Nothing,Vector{Any}}
elseif la == 3 && istopfunction(f, :(>:))
# mark issupertype as a exact alias for issubtype
# swap T1 and T2 arguments and call <:
if length(fargs) == 3
if fargs !== nothing && length(fargs) == 3
fargs = Any[<:, fargs[3], fargs[2]]
else
fargs = nothing
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2 changes: 2 additions & 0 deletions test/compiler/inference.jl
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Expand Up @@ -2541,3 +2541,5 @@ end
@test pickvarnames(Any[:a, :b]) === (:a, :b)
@test only(Base.return_types(pickvarnames, (Vector{Any},))) == Tuple{Vararg{Union{Symbol, Tuple}}}
@test only(Base.code_typed(pickvarnames, (Vector{Any},), optimize=false))[2] == Tuple{Vararg{Union{Symbol, Tuple{Vararg{Union{Symbol, Tuple}}}}}}

@test map(>:, [Int], [Int]) == [true]