From 7737c7c590cfe8fae51f58178b1bdccb5c34879f Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
Date: Tue, 1 May 2018 15:30:00 -0700
Subject: [PATCH] Fix binding switch to only handle param tags once

---
 src/compiler/binder.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 338aaeca7b9..d189c69e2bb 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -2103,7 +2103,6 @@ namespace ts {
                 case SyntaxKind.TypeParameter:
                     return bindTypeParameter(node as TypeParameterDeclaration);
                 case SyntaxKind.Parameter:
-                case SyntaxKind.JSDocParameterTag:
                     return bindParameter(<ParameterDeclaration>node);
                 case SyntaxKind.VariableDeclaration:
                     return bindVariableDeclarationOrBindingElement(<VariableDeclaration>node);
@@ -2206,6 +2205,9 @@ namespace ts {
                     return updateStrictModeStatementList((<Block | ModuleBlock>node).statements);
 
                 case SyntaxKind.JSDocParameterTag:
+                    if (node.parent.kind === SyntaxKind.JSDocCallbackTag) {
+                        return bindParameter(node as JSDocParameterTag);
+                    }
                     if (node.parent.kind !== SyntaxKind.JSDocTypeLiteral) {
                         break;
                     }