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-rw-r--r--tests/ui/regions/regions-outlives-projection-container-wc.rs35
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/regions/regions-outlives-projection-container-wc.rs b/tests/ui/regions/regions-outlives-projection-container-wc.rs
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+++ b/tests/ui/regions/regions-outlives-projection-container-wc.rs
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+// Test that we are imposing the requirement that every associated
+// type of a bound that appears in the where clause on a struct must
+// outlive the location in which the type appears, even when the
+// constraint is in a where clause not a bound. Issue #22246.
+
+#![allow(dead_code)]
+
+pub trait TheTrait {
+ type TheAssocType;
+}
+
+pub struct TheType<'b> {
+ m: [fn(&'b()); 0]
+}
+
+impl<'b> TheTrait for TheType<'b> {
+ type TheAssocType = &'b ();
+}
+
+pub struct WithAssoc<T> where T : TheTrait {
+ m: [T; 0]
+}
+
+fn with_assoc<'a,'b>() {
+ // For this type to be valid, the rules require that all
+ // associated types of traits that appear in `WithAssoc` must
+ // outlive 'a. In this case, that means TheType<'b>::TheAssocType,
+ // which is &'b (), must outlive 'a.
+
+ let _: &'a WithAssoc<TheType<'b>> = loop { };
+ //~^ ERROR lifetime may not live long enough
+}
+
+fn main() {
+}