don't delete imag

mcabbott · web-flow · commit 97775f50e2ef · 2022-09-01T16:10:37.000-04:00
diff --git a/src/tangent_arithmetic.jl b/src/tangent_arithmetic.jl
@@ -109,6 +109,7 @@ for T in (:AbstractThunk, :Tangent, :Any)
 end
 
 Base.real(z::AbstractZero) = z
+Base.imag(z::AbstractZero) = z
 
 Base.complex(::ZeroTangent) = ZeroTangent()
 Base.complex(::ZeroTangent, ::ZeroTangent) = ZeroTangent()
