From 3ef831069a7bb249f2ce5bfb8abeaac21a0e9183 Mon Sep 17 00:00:00 2001
From: Ben Lewis <benlewisj@gmail.com>
Date: Sat, 4 Jan 2020 13:42:02 +1300
Subject: [PATCH] Add lazy normalization tests

---
 .../ui/const-generics/issues/issue-61935.rs   | 24 ++++++++
 ...ssue-61336-1.stderr => issue-61935.stderr} |  3 -
 .../ui/const-generics/issues/issue-67185-1.rs | 32 ++++++++++
 .../issues/issue-67185-1.stderr               |  8 +++
 .../ui/const-generics/issues/issue-67185-2.rs | 34 +++++++++++
 .../issues/issue-67185-2.stderr               | 61 +++++++++++++++++++
 .../lazy-normalization/issue-71986.rs         |  8 +++
 7 files changed, 167 insertions(+), 3 deletions(-)
 create mode 100644 src/test/ui/const-generics/issues/issue-61935.rs
 rename src/test/ui/const-generics/issues/{issue-61336-1.stderr => issue-61935.stderr} (84%)
 create mode 100644 src/test/ui/const-generics/issues/issue-67185-1.rs
 create mode 100644 src/test/ui/const-generics/issues/issue-67185-1.stderr
 create mode 100644 src/test/ui/const-generics/issues/issue-67185-2.rs
 create mode 100644 src/test/ui/const-generics/issues/issue-67185-2.stderr
 create mode 100644 src/test/ui/const-generics/lazy-normalization/issue-71986.rs

diff --git a/src/test/ui/const-generics/issues/issue-61935.rs b/src/test/ui/const-generics/issues/issue-61935.rs
new file mode 100644
index 000000000000..35fb435b812a
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-61935.rs
@@ -0,0 +1,24 @@
+// check-pass
+
+#![feature(const_generics)]
+//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash
+
+trait Foo {}
+
+impl<const N: usize> Foo for [(); N]
+    where
+        Self:FooImpl<{N==0}>
+{}
+
+trait FooImpl<const IS_ZERO: bool>{}
+
+impl FooImpl<true> for [(); 0] {}
+
+impl<const N:usize> FooImpl<false> for [();N] {}
+
+fn foo(_: impl Foo) {}
+
+fn main() {
+    foo([]);
+    foo([()]);
+}
diff --git a/src/test/ui/const-generics/issues/issue-61336-1.stderr b/src/test/ui/const-generics/issues/issue-61935.stderr
similarity index 84%
rename from src/test/ui/const-generics/issues/issue-61336-1.stderr
rename to src/test/ui/const-generics/issues/issue-61935.stderr
index b2c69d57c40b..5ada50c34492 100644
--- a/src/test/ui/const-generics/issues/issue-61336-1.stderr
+++ b/src/test/ui/const-generics/issues/issue-61935.stderr
@@ -1,5 +1,4 @@
 warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/issue-61336-1.rs:1:12
    |
 LL | #![feature(const_generics)]
    |            ^^^^^^^^^^^^^^
@@ -7,5 +6,3 @@ LL | #![feature(const_generics)]
    = note: `#[warn(incomplete_features)]` on by default
    = note: see issue #44580 <https://github.com/rust-lang/rust/issues/44580> for more information
 
-warning: 1 warning emitted
-
diff --git a/src/test/ui/const-generics/issues/issue-67185-1.rs b/src/test/ui/const-generics/issues/issue-67185-1.rs
new file mode 100644
index 000000000000..89e0b7f62da5
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-67185-1.rs
@@ -0,0 +1,32 @@
+// check-pass
+
+#![feature(const_generics)]
+//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash
+
+trait Baz {
+    type Quaks;
+}
+impl Baz for u8 {
+    type Quaks = [u16; 3];
+}
+
+trait Bar {}
+impl Bar for [u16; 3] {}
+impl Bar for [[u16; 3]; 2] {}
+
+trait Foo
+    where
+        [<u8 as Baz>::Quaks; 2]: Bar,
+        <u8 as Baz>::Quaks: Bar,
+{
+}
+
+struct FooImpl;
+
+impl Foo for FooImpl {}
+
+fn f(_: impl Foo) {}
+
+fn main() {
+    f(FooImpl)
+}
diff --git a/src/test/ui/const-generics/issues/issue-67185-1.stderr b/src/test/ui/const-generics/issues/issue-67185-1.stderr
new file mode 100644
index 000000000000..01c09763314a
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-67185-1.stderr
@@ -0,0 +1,8 @@
+warning: the feature `const_generics` is incomplete and may cause the compiler to crash
+  --> $DIR/issue-67185-1.rs:3:12
+   |
+LL | #![feature(const_generics)]
+   |            ^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(incomplete_features)]` on by default
+
diff --git a/src/test/ui/const-generics/issues/issue-67185-2.rs b/src/test/ui/const-generics/issues/issue-67185-2.rs
new file mode 100644
index 000000000000..af797721324e
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-67185-2.rs
@@ -0,0 +1,34 @@
+#![feature(const_generics)]
+//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash
+
+trait Baz {
+    type Quaks;
+}
+impl Baz for u8 {
+    type Quaks = [u16; 3];
+}
+
+trait Bar {}
+impl Bar for [u16; 4] {}
+impl Bar for [[u16; 3]; 3] {}
+
+trait Foo  //~ ERROR mismatched types
+    where
+        [<u8 as Baz>::Quaks; 2]: Bar,
+        <u8 as Baz>::Quaks: Bar,
+{
+}
+
+struct FooImpl;
+
+impl Foo for FooImpl {}
+//~^ ERROR mismatched types
+//~^^ ERROR mismatched types
+
+fn f(_: impl Foo) {}
+//~^ ERROR mismatched types
+//~^^ ERROR mismatched types
+
+fn main() {
+    f(FooImpl)
+}
diff --git a/src/test/ui/const-generics/issues/issue-67185-2.stderr b/src/test/ui/const-generics/issues/issue-67185-2.stderr
new file mode 100644
index 000000000000..3a46d8fece88
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-67185-2.stderr
@@ -0,0 +1,61 @@
+warning: the feature `const_generics` is incomplete and may cause the compiler to crash
+  --> $DIR/issue-67185-2.rs:1:12
+   |
+LL | #![feature(const_generics)]
+   |            ^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(incomplete_features)]` on by default
+
+error[E0308]: mismatched types
+  --> $DIR/issue-67185-2.rs:15:1
+   |
+LL | / trait Foo
+LL | |     where
+LL | |         [<u8 as Baz>::Quaks; 2]: Bar,
+LL | |         <u8 as Baz>::Quaks: Bar,
+LL | | {
+LL | | }
+   | |_^ expected `3usize`, found `4usize`
+   |
+   = note: expected type `3usize`
+              found type `4usize`
+
+error[E0308]: mismatched types
+  --> $DIR/issue-67185-2.rs:24:6
+   |
+LL | impl Foo for FooImpl {}
+   |      ^^^ expected `3usize`, found `4usize`
+   |
+   = note: expected type `3usize`
+              found type `4usize`
+
+error[E0308]: mismatched types
+  --> $DIR/issue-67185-2.rs:24:6
+   |
+LL | impl Foo for FooImpl {}
+   |      ^^^ expected `2usize`, found `3usize`
+   |
+   = note: expected type `2usize`
+              found type `3usize`
+
+error[E0308]: mismatched types
+  --> $DIR/issue-67185-2.rs:28:1
+   |
+LL | fn f(_: impl Foo) {}
+   | ^^^^^^^^^^^^^^^^^^^^ expected `2usize`, found `3usize`
+   |
+   = note: expected type `2usize`
+              found type `3usize`
+
+error[E0308]: mismatched types
+  --> $DIR/issue-67185-2.rs:28:1
+   |
+LL | fn f(_: impl Foo) {}
+   | ^^^^^^^^^^^^^^^^^^^^ expected `3usize`, found `4usize`
+   |
+   = note: expected type `3usize`
+              found type `4usize`
+
+error: aborting due to 5 previous errors
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/const-generics/lazy-normalization/issue-71986.rs b/src/test/ui/const-generics/lazy-normalization/issue-71986.rs
new file mode 100644
index 000000000000..a07bf2a1a549
--- /dev/null
+++ b/src/test/ui/const-generics/lazy-normalization/issue-71986.rs
@@ -0,0 +1,8 @@
+// check-pass
+#![allow(incomplete_features)]
+#![feature(const_generics, lazy_normalization_consts)]
+
+pub trait Foo<const B: bool> {}
+pub fn bar<T: Foo<{ true }>>() {}
+
+fn main() {}