Rollup merge of #34963 - petrochenkov:useerr, r=jseyfried

resolve: Fix ICE and extra diagnostics happening when unresolved imports are used in patterns

Closes https://github.com/rust-lang/rust/issues/34933

r? @jseyfried

1 files changed, 27 insertions, 0 deletions

diff --git a/src/test/compile-fail/unresolved-import-recovery.rs b/src/test/compile-fail/unresolved-import-recovery.rs
new file mode 100644
index 00000000000..8173f69191d
--- /dev/null
+++ b/src/test/compile-fail/unresolved-import-recovery.rs
@@ -0,0 +1,27 @@
+// 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.
+
+// Check that unresolved imports do not create additional errors and ICEs
+
+mod m {
+    pub use unresolved; //~ ERROR unresolved import `unresolved`
+
+    fn f() {
+        let unresolved = 0; // OK
+    }
+}
+
+fn main() {
+    match 0u8 {
+        m::unresolved => {} // OK
+        m::unresolved(..) => {} // OK
+        m::unresolved{..} => {} // OK
+    }
+}