guard `isempty (close #41656) (#41752)

(cherry picked from commit 4c3829d)

Author: bicycle1885

contrib/generate_precompile.jl

@@ -1,6 +1,6 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-if isempty(Base.ARGS) || Base.ARGS[1] !== "0"
+if Base.isempty(Base.ARGS) || Base.ARGS[1] !== "0"
 Sys.__init_build()
 # Prevent this from being put into the Main namespace
 @eval Module() begin

test/misc.jl

@@ -1000,3 +1000,5 @@ let script = :(let ptr = Ptr{Cint}(ccall(:jl_mmap, Ptr{Cvoid},
     @test !success(`$(Base.julia_cmd()) -e $script`)
 end
 
+# issue #41656
+@test success(`$(Base.julia_cmd()) -e 'isempty(x) = true'`)