From 5ea1d0e865e3a15c054233198622b711ed0b5f86 Mon Sep 17 00:00:00 2001
From: Tomasz Miąsko <tomasz.miasko@gmail.com>
Date: Thu, 14 Jan 2021 00:00:00 +0000
Subject: Don't ICE when computing a layout of a generator tainted by errors

---
 src/test/ui/generator/layout-error.rs     | 28 ++++++++++++++++++++++++++++
 src/test/ui/generator/layout-error.stderr |  9 +++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 src/test/ui/generator/layout-error.rs
 create mode 100644 src/test/ui/generator/layout-error.stderr

(limited to 'src')

diff --git a/src/test/ui/generator/layout-error.rs b/src/test/ui/generator/layout-error.rs
new file mode 100644
index 00000000000..059867277ad
--- /dev/null
+++ b/src/test/ui/generator/layout-error.rs
@@ -0,0 +1,28 @@
+// Verifies that computing a layout of a generator tainted by type errors
+// doesn't ICE. Regression test for #80998.
+//
+// edition:2018
+
+#![feature(type_alias_impl_trait)]
+use std::future::Future;
+
+pub struct Task<F: Future>(F);
+impl<F: Future> Task<F> {
+    fn new() -> Self {
+        todo!()
+    }
+    fn spawn(&self, _: impl FnOnce() -> F) {
+        todo!()
+    }
+}
+
+fn main() {
+    async fn cb() {
+        let a = Foo; //~ ERROR cannot find value `Foo` in this scope
+    }
+
+    type F = impl Future;
+    // Check that statics are inhabited computes they layout.
+    static POOL: Task<F> = Task::new();
+    Task::spawn(&POOL, || cb());
+}
diff --git a/src/test/ui/generator/layout-error.stderr b/src/test/ui/generator/layout-error.stderr
new file mode 100644
index 00000000000..b1a258f4f2c
--- /dev/null
+++ b/src/test/ui/generator/layout-error.stderr
@@ -0,0 +1,9 @@
+error[E0425]: cannot find value `Foo` in this scope
+  --> $DIR/layout-error.rs:21:17
+   |
+LL |         let a = Foo;
+   |                 ^^^ not found in this scope
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0425`.
-- 
cgit 1.4.1-3-g733a5