exclude types with free variables from type_morespecific
#35555
Merged
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After loading packages like Unitful and StaticArrays that overload
show(io::IO, ::Type{<:T})
for someT
a case like this basically hangs:Those definitions cause us to add dispatch cache entries with free variables, which then drives method sorting a bit crazy. This is definitely not a comprehensive solution, but it seems to fix this specific case.