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 1/2] 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) {

From 94c455792aaee5f77308ac9307530a5995d234f9 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 29 May 2018 09:06:35 -0700
Subject: [PATCH 2/2] Remove unneeded assertions

---
 scripts/tslint/rules/noInOperatorRule.ts         | 2 +-
 scripts/tslint/rules/noIncrementDecrementRule.ts | 4 ++--
 src/services/documentHighlights.ts               | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/scripts/tslint/rules/noInOperatorRule.ts b/scripts/tslint/rules/noInOperatorRule.ts
index 448cf90cacd..95f052ccaa6 100644
--- a/scripts/tslint/rules/noInOperatorRule.ts
+++ b/scripts/tslint/rules/noInOperatorRule.ts
@@ -12,7 +12,7 @@ export class Rule extends Lint.Rules.AbstractRule {
 function walk(ctx: Lint.WalkContext<void>): void {
     ts.forEachChild(ctx.sourceFile, recur);
     function recur(node: ts.Node): void {
-        if (node.kind === ts.SyntaxKind.InKeyword && node.parent!.kind === ts.SyntaxKind.BinaryExpression) {
+        if (node.kind === ts.SyntaxKind.InKeyword && node.parent.kind === ts.SyntaxKind.BinaryExpression) {
             ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
         }
     }
diff --git a/scripts/tslint/rules/noIncrementDecrementRule.ts b/scripts/tslint/rules/noIncrementDecrementRule.ts
index ff2d81b1962..007d25919e1 100644
--- a/scripts/tslint/rules/noIncrementDecrementRule.ts
+++ b/scripts/tslint/rules/noIncrementDecrementRule.ts
@@ -28,7 +28,7 @@ function walk(ctx: Lint.WalkContext<void>): void {
     }
 
     function check(node: ts.UnaryExpression): void {
-        if (!isAllowedLocation(node.parent!)) {
+        if (!isAllowedLocation(node.parent)) {
             ctx.addFailureAtNode(node, Rule.POSTFIX_FAILURE_STRING);
         }
     }
@@ -47,7 +47,7 @@ function isAllowedLocation(node: ts.Node): boolean {
         // Can be in a comma operator in a for statement (`for (let a = 0, b = 10; a < b; a++, b--)`)
         case ts.SyntaxKind.BinaryExpression:
             return (node as ts.BinaryExpression).operatorToken.kind === ts.SyntaxKind.CommaToken &&
-                node.parent!.kind === ts.SyntaxKind.ForStatement;
+                node.parent.kind === ts.SyntaxKind.ForStatement;
 
         default:
             return false;
diff --git a/src/services/documentHighlights.ts b/src/services/documentHighlights.ts
index e6a78e098e9..afae01e0c68 100644
--- a/src/services/documentHighlights.ts
+++ b/src/services/documentHighlights.ts
@@ -180,7 +180,7 @@ namespace ts.DocumentHighlights {
                 default:
                     // Don't cross function boundaries.
                     // TODO: GH#20090
-                    return (isFunctionLike(node) && "quit") as false | "quit";
+                    return isFunctionLike(node) && "quit";
             }
         });
     }