Ensure we do not accidentally insert new early aborts in the analysis passes

Author: oli-obk

Diff for: compiler/rustc_driver_impl/src/pretty.rs

@@ -336,7 +336,8 @@ pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
         ThirTree => {
             let tcx = ex.tcx();
             let mut out = String::new();
-            if rustc_hir_analysis::check_crate(tcx).is_err() {
+            rustc_hir_analysis::check_crate(tcx);
+            if tcx.dcx().has_errors().is_some() {
                 FatalError.raise();
             }
             debug!("pretty printing THIR tree");
@@ -348,7 +349,8 @@ pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
         ThirFlat => {
             let tcx = ex.tcx();
             let mut out = String::new();
-            if rustc_hir_analysis::check_crate(tcx).is_err() {
+            rustc_hir_analysis::check_crate(tcx);
+            if tcx.dcx().has_errors().is_some() {
                 FatalError.raise();
             }
             debug!("pretty printing THIR flat");

Diff for: compiler/rustc_hir_analysis/src/lib.rs

@@ -97,7 +97,6 @@ mod outlives;
 pub mod structured_errors;
 mod variance;
 
-use rustc_errors::ErrorGuaranteed;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_middle::middle;
@@ -153,11 +152,11 @@ pub fn provide(providers: &mut Providers) {
     hir_wf_check::provide(providers);
 }
 
-pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
+pub fn check_crate(tcx: TyCtxt<'_>) {
     let _prof_timer = tcx.sess.timer("type_check_crate");
 
     if tcx.features().rustc_attrs {
-        tcx.sess.time("outlives_testing", || outlives::test::test_inferred_outlives(tcx))?;
+        let _ = tcx.sess.time("outlives_testing", || outlives::test::test_inferred_outlives(tcx));
     }
 
     tcx.sess.time("coherence_checking", || {
@@ -174,11 +173,11 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
     });
 
     if tcx.features().rustc_attrs {
-        tcx.sess.time("variance_testing", || variance::test::test_variance(tcx))?;
+        let _ = tcx.sess.time("variance_testing", || variance::test::test_variance(tcx));
     }
 
     if tcx.features().rustc_attrs {
-        collect::test_opaque_hidden_types(tcx)?;
+        let _ = collect::test_opaque_hidden_types(tcx);
     }
 
     // Make sure we evaluate all static and (non-associated) const items, even if unused.
@@ -213,8 +212,6 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
     });
 
     tcx.ensure().check_unused_traits(());
-
-    Ok(())
 }
 
 /// Lower a [`hir::Ty`] to a [`Ty`].

Diff for: compiler/rustc_interface/src/passes.rs

@@ -686,18 +686,15 @@ pub fn create_global_ctxt<'tcx>(
     })
 }
 
-/// Runs the type-checking, region checking and other miscellaneous analysis
-/// passes on the crate.
-fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
+/// Runs all analyses that we guarantee to run, even if errors were reported in earlier analyses.
+/// This function never fails.
+fn run_required_analyses(tcx: TyCtxt<'_>) {
     if tcx.sess.opts.unstable_opts.hir_stats {
         rustc_passes::hir_stats::print_hir_stats(tcx);
     }
-
     #[cfg(debug_assertions)]
     rustc_passes::hir_id_validator::check_crate(tcx);
-
     let sess = tcx.sess;
-
     sess.time("misc_checking_1", || {
         parallel!(
             {
@@ -733,10 +730,7 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
             }
         );
     });
-
-    // passes are timed inside typeck
-    rustc_hir_analysis::check_crate(tcx)?;
-
+    rustc_hir_analysis::check_crate(tcx);
     sess.time("MIR_borrow_checking", || {
         tcx.hir().par_body_owners(|def_id| {
             // Run unsafety check because it's responsible for stealing and
@@ -745,7 +739,6 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
             tcx.ensure().mir_borrowck(def_id)
         });
     });
-
     sess.time("MIR_effect_checking", || {
         for def_id in tcx.hir().body_owners() {
             tcx.ensure().has_ffi_unwind_calls(def_id);
@@ -761,16 +754,22 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
             }
         }
     });
-
     tcx.hir().par_body_owners(|def_id| {
         if tcx.is_coroutine(def_id.to_def_id()) {
             tcx.ensure().mir_coroutine_witnesses(def_id);
             tcx.ensure().check_coroutine_obligations(def_id);
         }
     });
-
     sess.time("layout_testing", || layout_test::test_layout(tcx));
     sess.time("abi_testing", || abi_test::test_abi(tcx));
+}
+
+/// Runs the type-checking, region checking and other miscellaneous analysis
+/// passes on the crate.
+fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
+    run_required_analyses(tcx);
+
+    let sess = tcx.sess;
 
     // Avoid overwhelming user with errors if borrow checking failed.
     // I'm not sure how helpful this is, to be honest, but it avoids a