Fix rust breakage with nr2

Nr2 did not emit the correct error message for break identifier "rust".

gcc/rust/ChangeLog:

	* resolve/rust-late-name-resolver-2.0.cc (Late::visit): Add "rust"
	identifier detection akin to nr1.
	(funny_ice_finalizer): Copy ICE finalizer from nr1.
	* resolve/rust-late-name-resolver-2.0.h: Add funny_error member
	context state.
	* Make-lang.in: Add new translation unit for new ice finalizer.
	* resolve/rust-ast-resolve-expr.cc: Move ice
	finalizer to it's own file.
	* resolve/rust-ice-finalizer.cc: New file.
	* resolve/rust-ice-finalizer.h: New file.

gcc/testsuite/ChangeLog:

	* rust/compile/nr2/exclude: Remove break-rust3.rs from exclude list.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/gcc/rust/resolve/rust-ice-finalizer.cc b/gcc/rust/resolve/rust-ice-finalizer.cc
new file mode 100644
index 0000000..3ec8438
--- /dev/null
+++ b/gcc/rust/resolve/rust-ice-finalizer.cc
@@ -0,0 +1,35 @@
+// Copyright (C) 2020-2024 Free Software Foundation, Inc.
+
+// This file is part of GCC.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with GCC; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include "rust-ice-finalizer.h"
+
+namespace Rust {
+namespace Resolver {
+
+void ATTRIBUTE_NORETURN
+funny_ice_finalizer (diagnostic_context *context,
+		     const diagnostic_info *diagnostic, diagnostic_t diag_kind)
+{
+  gcc_assert (diag_kind == DK_ICE_NOBT);
+  default_diagnostic_finalizer (context, diagnostic, diag_kind);
+  fnotice (stderr, "You have broken GCC Rust. This is a feature.\n");
+  exit (ICE_EXIT_CODE);
+}
+
+} // namespace Resolver
+} // namespace Rust