From 68351085dbbe85fa2779780451ba5d2f687727d2 Mon Sep 17 00:00:00 2001
From: Alex Dima <alexdima@microsoft.com>
Date: Thu, 5 Mar 2020 10:21:36 +0100
Subject: [PATCH] Fix treeshaking, not all export clauses should be kept

---
 build/lib/treeshaking.js | 3 ++-
 build/lib/treeshaking.ts | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/build/lib/treeshaking.js b/build/lib/treeshaking.js
index 0124362879e..b01e2001243 100644
--- a/build/lib/treeshaking.js
+++ b/build/lib/treeshaking.js
@@ -265,7 +265,8 @@ function markNodes(languageService, options) {
                 return;
             }
             if (ts.isExportDeclaration(node)) {
-                if (node.moduleSpecifier && ts.isStringLiteral(node.moduleSpecifier)) {
+                if (!node.exportClause && node.moduleSpecifier && ts.isStringLiteral(node.moduleSpecifier)) {
+                    // export * from "foo";
                     setColor(node, 2 /* Black */);
                     enqueueImport(node, node.moduleSpecifier.text);
                 }
diff --git a/build/lib/treeshaking.ts b/build/lib/treeshaking.ts
index ac57dbb9122..a6daa223605 100644
--- a/build/lib/treeshaking.ts
+++ b/build/lib/treeshaking.ts
@@ -351,7 +351,8 @@ function markNodes(languageService: ts.LanguageService, options: ITreeShakingOpt
 			}
 
 			if (ts.isExportDeclaration(node)) {
-				if (node.moduleSpecifier && ts.isStringLiteral(node.moduleSpecifier)) {
+				if (!node.exportClause && node.moduleSpecifier && ts.isStringLiteral(node.moduleSpecifier)) {
+					// export * from "foo";
 					setColor(node, NodeColor.Black);
 					enqueueImport(node, node.moduleSpecifier.text);
 				}