From 2d09d69fbedc9ef5b600a732955f03641ca6f11b Mon Sep 17 00:00:00 2001
From: David Barsky <me@davidbarsky.com>
Date: Thu, 8 Feb 2024 19:55:12 -0500
Subject: [PATCH] internal: fix crash inside `filter_unnecessary_bounds` for a
 missing generic param

---
 crates/ide-assists/src/handlers/generate_function.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/ide-assists/src/handlers/generate_function.rs b/crates/ide-assists/src/handlers/generate_function.rs
index 63a62abc21..1253bd8037 100644
--- a/crates/ide-assists/src/handlers/generate_function.rs
+++ b/crates/ide-assists/src/handlers/generate_function.rs
@@ -908,7 +908,7 @@ fn filter_unnecessary_bounds(
         }
     }
 
-    let starting_nodes = necessary_params.iter().map(|param| param_map[param]);
+    let starting_nodes = necessary_params.iter().flat_map(|param| param_map.get(param).copied());
     let reachable = graph.compute_reachable_nodes(starting_nodes);
 
     // Not pretty, but effective. If only there were `Vec::retain_index()`...