From 4683cb5bada7ebd5c804963e1d76417835cff4e1 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 29 May 2018 09:06:16 -0700
Subject: [PATCH] Add assertions

---
 scripts/tslint/rules/nextLineRule.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/tslint/rules/nextLineRule.ts b/scripts/tslint/rules/nextLineRule.ts
index fa03746afc6..9de80793c62 100644
--- a/scripts/tslint/rules/nextLineRule.ts
+++ b/scripts/tslint/rules/nextLineRule.ts
@@ -52,8 +52,8 @@ function walk(ctx: Lint.WalkContext<void>, checkCatch: boolean, checkElse: boole
             return;
         }
 
-        const tryClosingBrace = tryBlock.getLastToken(sourceFile);
-        const catchKeyword = catchClause.getFirstToken(sourceFile);
+        const tryClosingBrace = tryBlock.getLastToken(sourceFile)!;
+        const catchKeyword = catchClause.getFirstToken(sourceFile)!;
         const tryClosingBraceLoc = sourceFile.getLineAndCharacterOfPosition(tryClosingBrace.getEnd());
         const catchKeywordLoc = sourceFile.getLineAndCharacterOfPosition(catchKeyword.getStart(sourceFile));
         if (tryClosingBraceLoc.line === catchKeywordLoc.line) {