From 2b8ccf40aeb07e04f37652bb77aca8727717df64 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
Date: Fri, 16 Aug 2019 13:39:57 -0700
Subject: [PATCH] jsdoc template tags might be unmatched (#32936)

* jsdoc template tags might be unmatched

* Update fourslash test
---
 src/compiler/utilities.ts                          |  2 +-
 tests/cases/fourslash/jsDocFunctionSignatures13.ts | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/jsDocFunctionSignatures13.ts

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index b0cfb3eff24..58936916842 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2343,7 +2343,7 @@ namespace ts {
     export function getTypeParameterFromJsDoc(node: TypeParameterDeclaration & { parent: JSDocTemplateTag }): TypeParameterDeclaration | undefined {
         const name = node.name.escapedText;
         const { typeParameters } = (node.parent.parent.parent as SignatureDeclaration | InterfaceDeclaration | ClassDeclaration);
-        return find(typeParameters!, p => p.name.escapedText === name);
+        return typeParameters && find(typeParameters, p => p.name.escapedText === name);
     }
 
     export function hasRestParameter(s: SignatureDeclaration | JSDocSignature): boolean {
diff --git a/tests/cases/fourslash/jsDocFunctionSignatures13.ts b/tests/cases/fourslash/jsDocFunctionSignatures13.ts
new file mode 100644
index 00000000000..49da2cb86e5
--- /dev/null
+++ b/tests/cases/fourslash/jsDocFunctionSignatures13.ts
@@ -0,0 +1,10 @@
+///<reference path="fourslash.ts" />
+//// /**
+////  * @template {string} K/**/ a golden opportunity
+////  */
+//// function Multimap(iv) {
+//// };
+
+
+goTo.marker('');
+verify.quickInfoIs("any");