From 9eba2ccc08fff93943d76901c9dfebe01544c876 Mon Sep 17 00:00:00 2001
From: Filipe Silva <filipematossilva@gmail.com>
Date: Wed, 6 Nov 2019 16:18:52 +0000
Subject: [PATCH] fix(@ngtools/webpack): only remove decorators in VE

Fix #16070
---
 packages/ngtools/webpack/src/angular_compiler_plugin.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/packages/ngtools/webpack/src/angular_compiler_plugin.ts b/packages/ngtools/webpack/src/angular_compiler_plugin.ts
index 6891427808e5..376bb1631af5 100644
--- a/packages/ngtools/webpack/src/angular_compiler_plugin.ts
+++ b/packages/ngtools/webpack/src/angular_compiler_plugin.ts
@@ -981,8 +981,11 @@ export class AngularCompilerPlugin {
       // This is required to support forwardRef in ES2015 due to TDZ issues
       this._transformers.push(downlevelConstructorParameters(getTypeChecker));
     } else {
-      // Remove unneeded angular decorators.
-      this._transformers.push(removeDecorators(isAppPath, getTypeChecker));
+      if (!this._compilerOptions.enableIvy) {
+        // Remove unneeded angular decorators in VE.
+        // In Ivy they are removed in ngc directly.
+        this._transformers.push(removeDecorators(isAppPath, getTypeChecker));
+      }
       // Import ngfactory in loadChildren import syntax
       if (this._useFactories) {
         // Only transform imports to use factories with View Engine.