mach: Don't overwrite RUSTFLAGS when enabling debug assertions

servo · Sep 29, 2017 · c4aadfa · c4aadfa
1 parent 9ffd2b8
commit c4aadfa
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/python/servo/build_commands.py b/python/servo/build_commands.py
@@ -243,7 +243,7 @@ def build(self, target=None, release=False, dev=False, jobs=None,
         env = self.build_env(target=target, is_build=True)
 
         if with_debug_assertions:
-            env["RUSTFLAGS"] = "-C debug_assertions"
+            env['RUSTFLAGS'] = env.get('RUSTFLAGS', "") + " -C debug_assertions"
 
         if android:
             android_platform = self.config["android"]["platform"]