1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/regions/region-object-lifetime-in-coercion.rs b/tests/ui/regions/region-object-lifetime-in-coercion.rs
new file mode 100644
index 00000000000..95708de04d2
--- /dev/null
+++ b/tests/ui/regions/region-object-lifetime-in-coercion.rs
@@ -0,0 +1,34 @@
+// Test that attempts to implicitly coerce a value into an
+// object respect the lifetime bound on the object type.
+
+trait Foo {}
+impl<'a> Foo for &'a [u8] {}
+
+fn a(v: &[u8]) -> Box<dyn Foo + 'static> {
+    let x: Box<dyn Foo + 'static> = Box::new(v);
+    //~^ ERROR lifetime may not live long enough
+    x
+}
+
+fn b(v: &[u8]) -> Box<dyn Foo + 'static> {
+    Box::new(v)
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn c(v: &[u8]) -> Box<dyn Foo> {
+    // same as previous case due to RFC 599
+
+    Box::new(v)
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn d<'a,'b>(v: &'a [u8]) -> Box<dyn Foo+'b> {
+    Box::new(v)
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn e<'a:'b,'b>(v: &'a [u8]) -> Box<dyn Foo+'b> {
+    Box::new(v) // OK, thanks to 'a:'b
+}
+
+fn main() { }