Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / src / test / ui / const-generics / dont-evaluate-array-len-on-err-1.rs

diff --git a/src/test/ui/const-generics/dont-evaluate-array-len-on-err-1.rs b/src/test/ui/const-generics/dont-evaluate-array-len-on-err-1.rs
new file mode 100644 (file)
index 0000000..afef748
--- /dev/null
+++ b/src/test/ui/const-generics/dont-evaluate-array-len-on-err-1.rs
@@ -0,0 +1,22 @@
+#![feature(const_generics, const_evaluatable_checked)]
+#![allow(incomplete_features)]
+
+// This tests that during error handling for the "trait not implemented" error
+// we dont try to evaluate std::mem::size_of::<Self::Assoc> causing an ICE
+
+struct Adt;
+
+trait Foo {
+    type Assoc;
+    fn foo()
+    where
+        [Adt; std::mem::size_of::<Self::Assoc>()]: ,
+    {
+        <[Adt; std::mem::size_of::<Self::Assoc>()] as Foo>::bar()
+        //~^ Error: the trait bound
+    }
+
+    fn bar() {}
+}
+
+fn main() {}