Rollup merge of #37564 - Mark-Simulacrum:sized-ice, r=eddyb

Fix ICE when querying DefId on Def::Err.

Also moves computations into check that `kind_id` is `Ok(_)`, which is in theory an optimization, though I expect it's minor.

Fixes #37534.

r? @eddyb.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/compile-fail/issue-37534.rs b/src/test/compile-fail/issue-37534.rs
new file mode 100644
index 00000000000..eb676601e89
--- /dev/null
+++ b/src/test/compile-fail/issue-37534.rs
@@ -0,0 +1,16 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+struct Foo<T: ?Hash> { }
+//~^ ERROR trait `Hash` is not in scope [E0405]
+//~^^ ERROR parameter `T` is never used [E0392]
+//~^^^ WARN default bound relaxed for a type parameter, but this does nothing
+
+fn main() { }