From 19f829a54444cc2fbd05c996e03232c3b863bced Mon Sep 17 00:00:00 2001
From: Andrew Branch <andrew@wheream.io>
Date: Mon, 22 Jul 2019 10:57:34 -0700
Subject: [PATCH] =?UTF-8?q?Don=E2=80=99t=20fail=20when=20alias=20isn?=
 =?UTF-8?q?=E2=80=99t=20found?=
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---
 src/services/completions.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/services/completions.ts b/src/services/completions.ts
index d7aa66bdf4c..929890ba7e7 100644
--- a/src/services/completions.ts
+++ b/src/services/completions.ts
@@ -1359,7 +1359,9 @@ namespace ts.Completions {
                     if (isExportStarFromReExport || some(symbol.declarations, d => isExportSpecifier(d) && !d.propertyName && !!d.parent.parent.moduleSpecifier)) {
                         // Walk the export chain back one module (step 1 or 2 in diagrammed example).
                         // Or, in the case of `export * from "foo"`, `symbol` already points to the original export, so just use that.
-                        const nearestExportSymbolId = getSymbolId(isExportStarFromReExport ? symbol : Debug.assertDefined(getNearestExportSymbol(symbol)));
+                        const nearestExportSymbol = isExportStarFromReExport ? symbol : getNearestExportSymbol(symbol);
+                        if (!nearestExportSymbol) continue;
+                        const nearestExportSymbolId = getSymbolId(nearestExportSymbol);
                         const symbolHasBeenSeen = !!symbolToOriginInfoMap[nearestExportSymbolId] || aliasesToAlreadyIncludedSymbols.has(nearestExportSymbolId.toString());
                         if (!symbolHasBeenSeen) {
                             aliasesToReturnIfOriginalsAreMissing.set(nearestExportSymbolId.toString(), { alias: symbol, moduleSymbol });