Fix #920 (#921)

* Fix #920

* if needs to be static

* bump version

Author: mateuszbaran

Project.toml

@@ -1,6 +1,6 @@
 name = "StaticArrays"
 uuid = "90137ffa-7385-5640-81b9-e52037218182"
-version = "1.2.3"
+version = "1.2.4"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"

src/lu.jl

@@ -43,6 +43,13 @@ function lu(A::StaticMatrix{N,N}, pivot::Union{Val{false},Val{true}}=Val(true);
     LU(LowerTriangular(L), UpperTriangular(U), p)
 end
 
+@static if VERSION >= v"1.7-DEV"
+    # disambiguation
+    function lu(A::StaticMatrix{N,N}, pivot::Val{true}) where {N}
+        Base.@invoke lu(A::StaticMatrix{N,N} where N, pivot::Union{Val{false},Val{true}})
+    end
+end
+
 # location of the first zero on the diagonal, 0 when not found
 function _first_zero_on_diagonal(A::StaticMatrix{M,N,T}) where {M,N,T}
     if @generated