Fix compilation after changes to trait and run

The following PRs needed to be addressed:
  - rust-lang/rust#119833
  - rust-lang/rust#119790

Note that the rustc tests are no longer passing, but the failures
are unrelated to these changes and need further investigation.

.github/scripts/run_rustc_tests.sh

@@ -104,6 +104,8 @@ function run_tests() {
       --target=${HOST} \
       --llvm-filecheck="${FILE_CHECK}" \
       --channel=nightly \
+      --git-repository="rust-lang/project-stable-mir" \
+      --nightly-branch="main" \
       --target-rustcflags="--smir-check" \
       --host-rustcflags="--smir-check"
   done

tools/test-drive/src/main.rs

@@ -2,17 +2,15 @@
 
 #![feature(rustc_private)]
 #![feature(assert_matches)]
-#![feature(result_option_inspect)]
 
 mod sanity_checks;
 
 extern crate rustc_driver;
 extern crate rustc_interface;
-extern crate rustc_middle;
+#[macro_use]
 extern crate rustc_smir;
 extern crate stable_mir;
 
-use rustc_middle::ty::TyCtxt;
 use rustc_smir::{run, rustc_internal};
 use stable_mir::CompilerError;
 use std::ops::ControlFlow;
@@ -50,9 +48,9 @@ fn main() -> ExitCode {
             smir_args.contains(&FIXME_ARG.to_string()),
             Ordering::Relaxed,
         );
-        run!(rustc_args, tcx, test_stable_mir(tcx))
+        run!(rustc_args, test_stable_mir)
     } else {
-        run!(rustc_args, ControlFlow::<()>::Continue(()))
+        run!(rustc_args, || ControlFlow::<()>::Continue(()))
     };
     if result.is_ok() || matches!(result, Err(CompilerError::Skipped)) {
         ExitCode::SUCCESS
@@ -78,7 +76,7 @@ fn info(msg: String) {
 
 /// This function invoke other tests and process their results.
 /// Tests should avoid panic,
-fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
+fn test_stable_mir() -> ControlFlow<()> {
     let mut results = Vec::from(run_tests![
         sanity_checks::test_entry_fn,
         sanity_checks::test_all_fns,

tools/test-drive/src/sanity_checks.rs

@@ -4,6 +4,7 @@
 //! These checks should only depend on StableMIR APIs. See other modules for tests that compare
 //! the result between StableMIR and internal APIs.
 use crate::TestResult;
+use stable_mir::ty::{ImplDef, TraitDef};
 use stable_mir::{self, mir, mir::MirVisitor, ty, CrateDef};
 use std::collections::HashSet;
 use std::fmt::Debug;
@@ -60,24 +61,12 @@ pub fn test_all_fns() -> TestResult {
     Ok(())
 }
 
-/// Using these structures will always follow calls to get more details about those structures.
-/// Unless user is trying to find a specific type, this will get repetitive.
+/// Test that we can retrieve information about the trait declaration for every trait implementation.
 pub fn test_traits() -> TestResult {
-    // FIXME: All trait declarations only return local traits.
-    // See https://github.com/rust-lang/project-stable-mir/issues/37
-    let all_traits = stable_mir::all_trait_decls();
-    for trait_decl in all_traits.iter().map(stable_mir::trait_decl) {
-        // Can't compare trait_decl, so just compare a field for now.
-        check_equal(
-            stable_mir::trait_decl(&trait_decl.def_id).specialization_kind,
-            trait_decl.specialization_kind,
-            "external crate mismatch",
-        )?;
-    }
-
+    let all_traits = HashSet::<TraitDef>::from_iter(stable_mir::all_trait_decls().into_iter());
     for trait_impl in stable_mir::all_trait_impls()
         .iter()
-        .map(stable_mir::trait_impl)
+        .map(ImplDef::trait_impl)
     {
         check(
             all_traits.contains(&trait_impl.value.def_id),