From a188850dedeab85df9b11222f25afc59aeb3bb94 Mon Sep 17 00:00:00 2001
From: varkor <github@varkor.com>
Date: Tue, 23 Apr 2019 13:20:04 +0100
Subject: [PATCH] Add a test for incorrect numbers of const args

---
 .../incorrect-number-of-const-args.rs         | 11 ++++++++++
 .../incorrect-number-of-const-args.stderr     | 21 +++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 src/test/ui/const-generics/incorrect-number-of-const-args.rs
 create mode 100644 src/test/ui/const-generics/incorrect-number-of-const-args.stderr

diff --git a/src/test/ui/const-generics/incorrect-number-of-const-args.rs b/src/test/ui/const-generics/incorrect-number-of-const-args.rs
new file mode 100644
index 000000000000..7059e9d8348e
--- /dev/null
+++ b/src/test/ui/const-generics/incorrect-number-of-const-args.rs
@@ -0,0 +1,11 @@
+#![feature(const_generics)]
+//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash
+
+fn foo<const X: usize, const Y: usize>() -> usize {
+    0
+}
+
+fn main() {
+    foo::<0>(); //~ ERROR wrong number of const arguments: expected 2, found 1
+    foo::<0, 0, 0>(); //~ ERROR wrong number of const arguments: expected 2, found 3
+}
diff --git a/src/test/ui/const-generics/incorrect-number-of-const-args.stderr b/src/test/ui/const-generics/incorrect-number-of-const-args.stderr
new file mode 100644
index 000000000000..11727733eb53
--- /dev/null
+++ b/src/test/ui/const-generics/incorrect-number-of-const-args.stderr
@@ -0,0 +1,21 @@
+warning: the feature `const_generics` is incomplete and may cause the compiler to crash
+  --> $DIR/incorrect-number-of-const-args.rs:1:12
+   |
+LL | #![feature(const_generics)]
+   |            ^^^^^^^^^^^^^^
+
+error[E0107]: wrong number of const arguments: expected 2, found 1
+  --> $DIR/incorrect-number-of-const-args.rs:9:5
+   |
+LL |     foo::<0>();
+   |     ^^^^^^^^ expected 2 const arguments
+
+error[E0107]: wrong number of const arguments: expected 2, found 3
+  --> $DIR/incorrect-number-of-const-args.rs:10:17
+   |
+LL |     foo::<0, 0, 0>();
+   |                 ^ unexpected const argument
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0107`.