From 872395a38ccced1b5e8d69cecf011ffb5a5f3ed8 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Tue, 31 Jul 2018 17:01:39 +0200
Subject: [PATCH] enable jemalloc assertions when configured to do so

---
 src/liballoc_jemalloc/build.rs | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/liballoc_jemalloc/build.rs b/src/liballoc_jemalloc/build.rs
index 0aa46dc6d20..fbda425a70b 100644
--- a/src/liballoc_jemalloc/build.rs
+++ b/src/liballoc_jemalloc/build.rs
@@ -105,11 +105,10 @@ fn main() {
         cmd.arg("--with-jemalloc-prefix=je_");
     }
 
-    // FIXME: building with jemalloc assertions is currently broken.
-    // See <https://github.com/rust-lang/rust/issues/44152>.
-    //if cfg!(feature = "debug") {
-    //    cmd.arg("--enable-debug");
-    //}
+    if cfg!(feature = "debug") {
+        // Enable jemalloc assertions.
+        cmd.arg("--enable-debug");
+    }
 
     cmd.arg(format!("--host={}", build_helper::gnu_target(&target)));
     cmd.arg(format!("--build={}", build_helper::gnu_target(&host)));