Add niche-in-generator test

rust-lang · Aug 3, 2019 · 9d4ca87 · 9d4ca87
1 parent 6fae7f8
commit 9d4ca87
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/src/test/run-pass/generator/niche-in-generator.rs b/src/test/run-pass/generator/niche-in-generator.rs
@@ -0,0 +1,17 @@
+// Test that niche finding works with captured generator upvars.
+
+#![feature(generators)]
+
+use std::mem::size_of_val;
+
+fn take<T>(_: T) {}
+
+fn main() {
+    let x = false;
+    let gen1 = || {
+        yield;
+        take(x);
+    };
+
+    assert_eq!(size_of_val(&gen1), size_of_val(&Some(gen1)));
+}