From 568cc22c3d04338f3413af19332a1c31b44dbf77 Mon Sep 17 00:00:00 2001
From: Ayaz Hafiz <ayaz.hafiz.1@gmail.com>
Date: Sat, 6 Jun 2020 11:44:28 -0700
Subject: [PATCH] Add regression test for const generic ICE in #72819

Closes #72819
---
 .../issues/issue-72819-generic-in-const-eval.rs  | 16 ++++++++++++++++
 .../issue-72819-generic-in-const-eval.stderr     | 10 ++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.rs
 create mode 100644 src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.stderr

diff --git a/src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.rs b/src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.rs
new file mode 100644
index 000000000000..d9cbc815e8ba
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.rs
@@ -0,0 +1,16 @@
+#![feature(const_generics)]
+#![allow(incomplete_features)]
+struct Arr<const N: usize>
+where Assert::<{N < usize::max_value() / 2}>: IsTrue, //~ ERROR constant expression depends on a generic parameter
+{
+}
+
+enum Assert<const CHECK: bool> {}
+
+trait IsTrue {}
+
+impl IsTrue for Assert<true> {}
+
+fn main() {
+    let x: Arr<{usize::max_value()}> = Arr {};
+}
diff --git a/src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.stderr b/src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.stderr
new file mode 100644
index 000000000000..f0b761f114b3
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-72819-generic-in-const-eval.stderr
@@ -0,0 +1,10 @@
+error: constant expression depends on a generic parameter
+  --> $DIR/issue-72819-generic-in-const-eval.rs:4:47
+   |
+LL | where Assert::<{N < usize::max_value() / 2}>: IsTrue,
+   |                                               ^^^^^^
+   |
+   = note: this may fail depending on what value the parameter takes
+
+error: aborting due to previous error
+