Upgrade Toolchain to 8/29 (#3468)

Upgrade toolchain to 8/29.

Culprit upstream changes: rust-lang/rust#129686

Resolves #3466

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 and MIT licenses.

kani-compiler/src/codegen_cprover_gotoc/codegen/assert.rs

@@ -21,7 +21,7 @@
 use crate::codegen_cprover_gotoc::GotocCtx;
 use cbmc::goto_program::{Expr, Location, Stmt, Type};
 use cbmc::InternedString;
-use rustc_middle::mir::coverage::CodeRegion;
+use rustc_middle::mir::coverage::SourceRegion;
 use stable_mir::mir::{Place, ProjectionElem};
 use stable_mir::ty::{Span as SpanStable, TypeAndMut};
 use strum_macros::{AsRefStr, EnumString};
@@ -153,14 +153,14 @@ impl<'tcx> GotocCtx<'tcx> {
         &self,
         counter_data: &str,
         span: SpanStable,
-        code_region: CodeRegion,
+        source_region: SourceRegion,
     ) -> Stmt {
         let loc = self.codegen_caller_span_stable(span);
         // Should use Stmt::cover, but currently this doesn't work with CBMC
         // unless it is run with '--cover cover' (see
         // https://github.com/diffblue/cbmc/issues/6613). So for now use
         // `assert(false)`.
-        let msg = format!("{counter_data} - {code_region:?}");
+        let msg = format!("{counter_data} - {source_region:?}");
         self.codegen_assert(Expr::bool_false(), PropertyClass::CodeCoverage, &msg, loc)
     }
 

kani-compiler/src/codegen_cprover_gotoc/codegen/function.rs

@@ -219,34 +219,34 @@ impl<'tcx> GotocCtx<'tcx> {
 
 pub mod rustc_smir {
     use crate::stable_mir::CrateDef;
-    use rustc_middle::mir::coverage::CodeRegion;
     use rustc_middle::mir::coverage::CovTerm;
     use rustc_middle::mir::coverage::MappingKind::Code;
+    use rustc_middle::mir::coverage::SourceRegion;
     use rustc_middle::ty::TyCtxt;
     use stable_mir::mir::mono::Instance;
     use stable_mir::Opaque;
 
     type CoverageOpaque = stable_mir::Opaque;
 
-    /// Retrieves the `CodeRegion` associated with the data in a
+    /// Retrieves the `SourceRegion` associated with the data in a
     /// `CoverageOpaque` object.
     pub fn region_from_coverage_opaque(
         tcx: TyCtxt,
         coverage_opaque: &CoverageOpaque,
         instance: Instance,
-    ) -> Option<CodeRegion> {
+    ) -> Option<SourceRegion> {
         let cov_term = parse_coverage_opaque(coverage_opaque);
         region_from_coverage(tcx, cov_term, instance)
     }
 
-    /// Retrieves the `CodeRegion` associated with a `CovTerm` object.
+    /// Retrieves the `SourceRegion` associated with a `CovTerm` object.
     ///
     /// Note: This function could be in the internal `rustc` impl for `Coverage`.
     pub fn region_from_coverage(
         tcx: TyCtxt<'_>,
         coverage: CovTerm,
         instance: Instance,
-    ) -> Option<CodeRegion> {
+    ) -> Option<SourceRegion> {
         // We need to pull the coverage info from the internal MIR instance.
         let instance_def = rustc_smir::rustc_internal::internal(tcx, instance.def.def_id());
         let body = tcx.instance_mir(rustc_middle::ty::InstanceKind::Item(instance_def));
@@ -258,7 +258,7 @@ pub mod rustc_smir {
             for mapping in &cov_info.mappings {
                 let Code(term) = mapping.kind else { unreachable!() };
                 if term == coverage {
-                    return Some(mapping.code_region.clone());
+                    return Some(mapping.source_region.clone());
                 }
             }
         }

kani-compiler/src/codegen_cprover_gotoc/codegen/statement.rs

@@ -163,11 +163,11 @@ impl<'tcx> GotocCtx<'tcx> {
                 let function_name = self.current_fn().readable_name();
                 let instance = self.current_fn().instance_stable();
                 let counter_data = format!("{coverage_opaque:?} ${function_name}$");
-                let maybe_code_region =
+                let maybe_source_region =
                     region_from_coverage_opaque(self.tcx, &coverage_opaque, instance);
-                if let Some(code_region) = maybe_code_region {
+                if let Some(source_region) = maybe_source_region {
                     let coverage_stmt =
-                        self.codegen_coverage(&counter_data, stmt.span, code_region);
+                        self.codegen_coverage(&counter_data, stmt.span, source_region);
                     // TODO: Avoid single-statement blocks when conversion of
                     // standalone statements to the irep format is fixed.
                     // More details in <https://github.com/model-checking/kani/issues/3012>

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [toolchain]
-channel = "nightly-2024-08-28"
+channel = "nightly-2024-08-29"
 components = ["llvm-tools", "rustc-dev", "rust-src", "rustfmt"]