improve type stability of tail/front(::NamedTuple) (#46762)

This fixes some invalidations when loading ChainRulesCore.jl. (cherry picked from commit e758982)
JuliaLang · Sep 16, 2022 · ab67e93 · ab67e93
1 parent 22d1000
commit ab67e93
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/base/namedtuple.jl b/base/namedtuple.jl
@@ -319,8 +319,8 @@ values(nt::NamedTuple) = Tuple(nt)
 haskey(nt::NamedTuple, key::Union{Integer, Symbol}) = isdefined(nt, key)
 get(nt::NamedTuple, key::Union{Integer, Symbol}, default) = haskey(nt, key) ? getfield(nt, key) : default
 get(f::Callable, nt::NamedTuple, key::Union{Integer, Symbol}) = haskey(nt, key) ? getfield(nt, key) : f()
-tail(t::NamedTuple{names}) where names = NamedTuple{tail(names)}(t)
-front(t::NamedTuple{names}) where names = NamedTuple{front(names)}(t)
+tail(t::NamedTuple{names}) where names = NamedTuple{tail(names::Tuple)}(t)
+front(t::NamedTuple{names}) where names = NamedTuple{front(names::Tuple)}(t)
 
 @pure function diff_names(an::Tuple{Vararg{Symbol}}, bn::Tuple{Vararg{Symbol}})
     @nospecialize an bn