From 7e347314bb1d8137489335766e9f53160977163f Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Wed, 22 May 2024 13:38:55 +0200
Subject: [PATCH] fix: Plug leak in EvalState::realise_string

(cherry picked from commit d9f9aa64ceb48c39c028d48680a664063d70bc23)
---
 rust/nix-expr/src/eval_state.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rust/nix-expr/src/eval_state.rs b/rust/nix-expr/src/eval_state.rs
index 51e236c..ec1b818 100644
--- a/rust/nix-expr/src/eval_state.rs
+++ b/rust/nix-expr/src/eval_state.rs
@@ -175,6 +175,11 @@ impl EvalState {
             paths
         };
 
+        // We've converted the nix_realised_string to a native struct containing copies, so we can free it now.
+        unsafe {
+            raw::realised_string_free(rs);
+        }
+
         Ok(RealisedString { s, paths })
     }