update compiletest to support testing if rustfix didnt crash

Author: jdonszelmann

src/tools/compiletest/src/directives.rs

@@ -181,6 +181,8 @@ pub(crate) struct TestProps {
     pub run_rustfix: bool,
     // If true, `rustfix` will only apply `MachineApplicable` suggestions.
     pub rustfix_only_machine_applicable: bool,
+    // If true, don't test the fixed program. It's still broken in some way.
+    pub rustfix_dont_test_fixed: bool,
     pub assembly_output: Option<String>,
     // If true, the test is expected to ICE
     pub should_ice: bool,
@@ -245,6 +247,7 @@ mod directives {
     pub const DONT_CHECK_FAILURE_STATUS: &'static str = "dont-check-failure-status";
     pub const RUN_RUSTFIX: &'static str = "run-rustfix";
     pub const RUSTFIX_ONLY_MACHINE_APPLICABLE: &'static str = "rustfix-only-machine-applicable";
+    pub const RUSTFIX_DONT_TEST_FIXED: &'static str = "rustfix-dont-test-fixed";
     pub const ASSEMBLY_OUTPUT: &'static str = "assembly-output";
     pub const STDERR_PER_BITWIDTH: &'static str = "stderr-per-bitwidth";
     pub const INCREMENTAL: &'static str = "incremental";
@@ -303,6 +306,7 @@ impl TestProps {
             dont_check_failure_status: false,
             run_rustfix: false,
             rustfix_only_machine_applicable: false,
+            rustfix_dont_test_fixed: false,
             assembly_output: None,
             should_ice: false,
             stderr_per_bitwidth: false,
@@ -543,6 +547,11 @@ impl TestProps {
                         RUSTFIX_ONLY_MACHINE_APPLICABLE,
                         &mut self.rustfix_only_machine_applicable,
                     );
+                    config.set_name_directive(
+                        ln,
+                        RUSTFIX_DONT_TEST_FIXED,
+                        &mut self.rustfix_dont_test_fixed,
+                    );
                     config.set_name_value_directive(
                         ln,
                         ASSEMBLY_OUTPUT,

src/tools/compiletest/src/directives/directive_names.rs

@@ -260,6 +260,7 @@ pub(crate) const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "run-pass",
     "run-rustfix",
     "rustc-env",
+    "rustfix-dont-test-fixed",
     "rustfix-only-machine-applicable",
     "should-fail",
     "should-ice",

src/tools/compiletest/src/runtest/ui.rs

@@ -220,7 +220,10 @@ impl TestCx<'_> {
         self.check_all_error_patterns(&output_to_check, pattern_proc_res);
         self.check_forbid_output(&output_to_check, pattern_proc_res);
 
-        if self.props.run_rustfix && self.config.compare_mode.is_none() {
+        if self.props.run_rustfix
+            && self.config.compare_mode.is_none()
+            && !self.props.rustfix_dont_test_fixed
+        {
             // And finally, compile the fixed code and make sure it both
             // succeeds and has no diagnostics.
             let mut rustc = self.make_compile_args(

tests/ui/parser/attribute/invalid-delimeter-ice-146808.fixed

@@ -1,7 +1,9 @@
 // regression test for #146808
 //@ proc-macro: all_spans_same.rs
 //@ run-rustfix
-//@ rustfix-only-machine-applicable
+// the fixed program is still broken, but rustfix didn't crash!
+// that's what we want to test here.
+//@ rustfix-dont-test-fixed
 
 extern crate all_spans_same;
 

tests/ui/parser/attribute/invalid-delimeter-ice-146808.rs

@@ -1,7 +1,9 @@
 // regression test for #146808
 //@ proc-macro: all_spans_same.rs
 //@ run-rustfix
-//@ rustfix-only-machine-applicable
+// the fixed program is still broken, but rustfix didn't crash!
+// that's what we want to test here.
+//@ rustfix-dont-test-fixed
 
 extern crate all_spans_same;
 

tests/ui/parser/attribute/invalid-delimeter-ice-146808.stderr

@@ -1,5 +1,5 @@
 error: wrong meta list delimiters
-  --> $DIR/invalid-delimeter-ice-146808.rs:8:1
+  --> $DIR/invalid-delimeter-ice-146808.rs:10:1
    |
 LL | #[all_spans_same::all_spans_same]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^