Make annotations mandatory for internal ui tests

Author: GuillaumeGomez

tests/compile-test.rs

@@ -220,7 +220,7 @@ fn run_internal_tests(cx: &TestContext) {
     if !RUN_INTERNAL_TESTS {
         return;
     }
-    let mut config = cx.base_config("ui-internal", false);
+    let mut config = cx.base_config("ui-internal", true);
     config.bless_command = Some("cargo uitest --features internal -- -- --bless".into());
 
     ui_test::run_tests_generic(

tests/ui-internal/custom_ice_message.rs

@@ -10,5 +10,6 @@
 #![allow(clippy::missing_clippy_version_attribute)]
 
 fn it_looks_like_you_are_trying_to_kill_clippy() {}
+//~^ ice: Would you like some help with that?
 
 fn main() {}

tests/ui-internal/custom_ice_message.stderr

@@ -1,9 +1,18 @@
-
-thread '<unnamed>' panicked at clippy_lints/src/utils/internal_lints/produce_ice.rs:
-Would you like some help with that?
-note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
-
-error: the compiler unexpectedly panicked. this is a bug.
+note: no errors encountered even though delayed bugs were created
+
+note: those delayed bugs will now be shown as internal compiler errors
+
+error: internal compiler error: Would you like some help with that?
+  --> tests/ui-internal/custom_ice_message.rs:12:1
+   |
+LL | fn it_looks_like_you_are_trying_to_kill_clippy() {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: delayed at clippy_lints/src/utils/internal_lints/produce_ice.rs - disabled backtrace
+  --> tests/ui-internal/custom_ice_message.rs:12:1
+   |
+LL | fn it_looks_like_you_are_trying_to_kill_clippy() {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy/issues/new?template=ice.yml
 
@@ -13,9 +22,5 @@ note: rustc <version> running on <target>
 
 note: compiler flags: -Z ui-testing -Z deduplicate-diagnostics=no
 
-query stack during panic:
-#0 [early_lint_checks] perform lints prior to AST lowering
-#1 [hir_crate] getting the crate HIR
-... and 3 other queries... use `env RUST_BACKTRACE=1` to see the full query stack
 note: Clippy version: foo