From 04024a2a8df83dea08d7293686b71fcafc0659eb Mon Sep 17 00:00:00 2001
From: Jos de Jong <wjosdejong@gmail.com>
Date: Fri, 23 Dec 2022 12:22:41 +0100
Subject: [PATCH] fix a TS issue

---
 src/Complex/type.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Complex/type.ts b/src/Complex/type.ts
index d0845c8..50a231f 100644
--- a/src/Complex/type.ts
+++ b/src/Complex/type.ts
@@ -7,7 +7,7 @@ export type Complex<T> = { re: T; im: T; }
 export const Complex_type = {
    test: <T>(dep: { testT: (z: unknown) => z is T }) =>
       (z: unknown): z is Complex<T> =>
-         typeof z === 'object' && 're' in z && 'im' in z
+         typeof z === 'object' && z != null && 're' in z && 'im' in z
          && dep.testT(z.re) && dep.testT(z.im),
    infer: (dep: typeOfDependency) =>
       (z: Complex<unknown>) => joinTypes(dep.typeOf(z.re), dep.typeOf(z.im)),