From 01c58e812e1faae6aacfd2a44ab8de344a3b466e Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Sat, 27 May 2017 16:31:11 +0200
Subject: be always very strict (recently added to typescript)

---
 src/checkable.ts | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/checkable.ts b/src/checkable.ts
index 24eebc713..1b6e371f6 100644
--- a/src/checkable.ts
+++ b/src/checkable.ts
@@ -67,10 +67,11 @@ export namespace Checkable {
     props: Prop[];
   }
 
-  export let SchemaError = (function SchemaError(message: string) {
-    this.name = 'SchemaError';
-    this.message = message;
-    this.stack = (<any>new Error()).stack;
+  export let SchemaError = (function SchemaError(this: any, message: string) {
+    let that: any = this as any;
+    that.name = 'SchemaError';
+    that.message = message;
+    that.stack = (<any>new Error()).stack;
   }) as any as SchemaErrorConstructor;
 
 
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