From 177d2411608873c8f6585969c70f475e89543d8a Mon Sep 17 00:00:00 2001
From: Vladimir Komendantskiy <komendantsky@gmail.com>
Date: Thu, 30 Jul 2020 13:54:39 +0100
Subject: [PATCH] use replace value

---
 logger/src/lib.rs                  | 2 +-
 metrics/src/metrics.rs             | 2 +-
 programs/budget/src/budget_expr.rs | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/logger/src/lib.rs b/logger/src/lib.rs
index 2c456fd292..81da2f440b 100644
--- a/logger/src/lib.rs
+++ b/logger/src/lib.rs
@@ -26,7 +26,7 @@ fn replace_logger(logger: env_logger::Logger) {
     let max_level = logger.filter();
     log::set_max_level(max_level);
     let mut rw = LOGGER.write().unwrap();
-    std::mem::replace(&mut *rw, logger);
+    let _ = std::mem::replace(&mut *rw, logger);
     let _ = log::set_boxed_logger(Box::new(LoggerShim {}));
 }
 
diff --git a/metrics/src/metrics.rs b/metrics/src/metrics.rs
index c77f56c7a5..7a02cc73a5 100644
--- a/metrics/src/metrics.rs
+++ b/metrics/src/metrics.rs
@@ -334,7 +334,7 @@ lazy_static! {
 pub fn set_host_id(host_id: String) {
     let mut rw = HOST_ID.write().unwrap();
     info!("host id: {}", host_id);
-    std::mem::replace(&mut *rw, host_id);
+    let _ = std::mem::replace(&mut *rw, host_id);
 }
 
 /// Submits a new point from any thread.  Note that points are internally queued
diff --git a/programs/budget/src/budget_expr.rs b/programs/budget/src/budget_expr.rs
index 413f7ae35d..b8cbec5c69 100644
--- a/programs/budget/src/budget_expr.rs
+++ b/programs/budget/src/budget_expr.rs
@@ -256,7 +256,7 @@ impl BudgetExpr {
             _ => None,
         };
         if let Some(expr) = new_expr {
-            mem::replace(self, *expr);
+            let _ = mem::replace(self, *expr);
         }
     }
 }