Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/ui/threads-sendsync/send-is-not-static-par-for.rs b/tests/ui/threads-sendsync/send-is-not-static-par-for.rs
new file mode 100644
index 000000000..dbe465551
--- /dev/null
+++ b/tests/ui/threads-sendsync/send-is-not-static-par-for.rs
@@ -0,0 +1,34 @@
+// run-pass
+#![allow(unused_imports)]
+use std::thread;
+use std::sync::Mutex;
+
+fn par_for<I, F>(iter: I, f: F)
+    where I: Iterator,
+          I::Item: Send,
+          F: Fn(I::Item) + Sync
+{
+    for item in iter {
+        f(item)
+    }
+}
+
+fn sum(x: &[i32]) {
+    let sum_lengths = Mutex::new(0);
+    par_for(x.windows(4), |x| {
+        *sum_lengths.lock().unwrap() += x.len()
+    });
+
+    assert_eq!(*sum_lengths.lock().unwrap(), (x.len() - 3) * 4);
+}
+
+fn main() {
+    let mut elements = [0; 20];
+
+    // iterators over references into this stack frame
+    par_for(elements.iter_mut().enumerate(), |(i, x)| {
+        *x = i as i32
+    });
+
+    sum(&elements)
+}