From d4703e1a97760604cadb4167d5de4a897883119f Mon Sep 17 00:00:00 2001
From: Brad Zacher <brad.zacher@gmail.com>
Date: Fri, 25 Oct 2019 14:36:59 -0700
Subject: [PATCH] fix(typescript-estree): ensure parent pointers are set
 (#1129)

---
 .../WatchCompilerHostOfConfigFile.ts                   |  0
 .../src/create-program/createWatchProgram.ts           | 10 ++++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)
 rename packages/typescript-estree/src/{ => create-program}/WatchCompilerHostOfConfigFile.ts (100%)

diff --git a/packages/typescript-estree/src/WatchCompilerHostOfConfigFile.ts b/packages/typescript-estree/src/create-program/WatchCompilerHostOfConfigFile.ts
similarity index 100%
rename from packages/typescript-estree/src/WatchCompilerHostOfConfigFile.ts
rename to packages/typescript-estree/src/create-program/WatchCompilerHostOfConfigFile.ts
diff --git a/packages/typescript-estree/src/create-program/createWatchProgram.ts b/packages/typescript-estree/src/create-program/createWatchProgram.ts
index 3acf67d385a..ddd2d90ccb1 100644
--- a/packages/typescript-estree/src/create-program/createWatchProgram.ts
+++ b/packages/typescript-estree/src/create-program/createWatchProgram.ts
@@ -3,7 +3,7 @@ import fs from 'fs';
 import path from 'path';
 import ts from 'typescript';
 import { Extra } from '../parser-options';
-import { WatchCompilerHostOfConfigFile } from '../WatchCompilerHostOfConfigFile';
+import { WatchCompilerHostOfConfigFile } from './WatchCompilerHostOfConfigFile';
 import {
   canonicalDirname,
   CanonicalPath,
@@ -160,7 +160,13 @@ function getProgramsForProjects(
 
     if (fileList.has(filePath)) {
       log('Found existing program for file. %s', filePath);
-      return [updatedProgram || existingWatch.getProgram().getProgram()];
+
+      updatedProgram =
+        updatedProgram || existingWatch.getProgram().getProgram();
+      // sets parent pointers in source files
+      updatedProgram.getTypeChecker();
+
+      return [updatedProgram];
     }
   }
   log(