From 3d119304531358524efc8ba2d1191cd5f6387280 Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Wed, 14 Aug 2019 16:16:43 -0700
Subject: [PATCH] Get base primitive type for unary operators.

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

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 65722fa6d52..649fcac83bb 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -24083,7 +24083,7 @@ namespace ts {
                     }
                     if (node.operator === SyntaxKind.PlusToken) {
                         if (maybeTypeOfKind(operandType, TypeFlags.BigIntLike)) {
-                            error(node.operand, Diagnostics.Operator_0_cannot_be_applied_to_type_1, tokenToString(node.operator), typeToString(operandType));
+                            error(node.operand, Diagnostics.Operator_0_cannot_be_applied_to_type_1, tokenToString(node.operator), typeToString(getBaseTypeOfLiteralType(operandType)));
                         }
                         return numberType;
                     }