Ensure that closure call is not removed by MIR optimizations in a test

diff --git a/src/test/codegen/internalize-closures.rs b/src/test/codegen/internalize-closures.rs
index 8d9192c6fa0c1fe953a60e1ef03bed6f7795eb4a..ab3dc3fba5ef6eb78b2205ca1d893d20cabbbbb2 100644 (file)
--- a/src/test/codegen/internalize-closures.rs
+++ b/src/test/codegen/internalize-closures.rs
@@ -1,4 +1,4 @@
-// compile-flags: -C no-prepopulate-passes
+// compile-flags: -C no-prepopulate-passes -Zmir-opt-level=0
 
 pub fn main() {