From 798f43da502e4b8d52e9b907420708d956faa054 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Fri, 17 Jul 2020 15:44:37 +0200
Subject: Fix out of bounds panic in active parameter

---
 crates/ra_ide/src/call_info.rs | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'crates/ra_ide/src/call_info.rs')

diff --git a/crates/ra_ide/src/call_info.rs b/crates/ra_ide/src/call_info.rs
index 14980afdd..ff602202f 100644
--- a/crates/ra_ide/src/call_info.rs
+++ b/crates/ra_ide/src/call_info.rs
@@ -161,6 +161,10 @@ impl ActiveParameter {
 
         let idx = active_parameter?;
         let mut params = signature.params(sema.db);
+        if !(idx < params.len()) {
+            mark::hit!(too_many_arguments);
+            return None;
+        }
         let (pat, ty) = params.swap_remove(idx);
         let name = pat?.to_string();
         Some(ActiveParameter { ty, name })
-- 
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