only real coeffs can be checked in isnegative

shashi · shashi · commit 6ae4022ede4a · 2021-01-27T14:14:09.000-05:00
diff --git a/src/types.jl b/src/types.jl
@@ -347,7 +347,7 @@ const show_simplified = Ref(false)
 
 Base.show(io::IO, t::Term) = show_term(io, t)
 
-isnegative(t::Number) = t < 0
+isnegative(t::Real) = t < 0
 function isnegative(t)
     if istree(t) && operation(t) === (*)
         coeff = first(arguments(t))
