From 3ce89e257d20c34795d0577ea4ba0e0be194c0db Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Mon, 27 Oct 2025 15:54:49 +0000
Subject: [PATCH] Use the actual StableCrateId for the incr comp session dir

Previously only --crate-type would be taken into account, not #![crate_type].
---
 compiler/rustc_incremental/src/persist/fs.rs  | 20 +++++++------------
 .../rustc_incremental/src/persist/load.rs     | 11 +++++++---
 compiler/rustc_interface/src/passes.rs        |  2 +-
 3 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/compiler/rustc_incremental/src/persist/fs.rs b/compiler/rustc_incremental/src/persist/fs.rs
index 975bf1d18622..f73cc4d43e8c 100644
--- a/compiler/rustc_incremental/src/persist/fs.rs
+++ b/compiler/rustc_incremental/src/persist/fs.rs
@@ -116,8 +116,6 @@ use rustc_data_structures::unord::{UnordMap, UnordSet};
 use rustc_data_structures::{base_n, flock};
 use rustc_fs_util::{LinkOrCopy, link_or_copy, try_canonicalize};
 use rustc_middle::bug;
-use rustc_session::config::CrateType;
-use rustc_session::output::collect_crate_types;
 use rustc_session::{Session, StableCrateId};
 use rustc_span::Symbol;
 use tracing::debug;
@@ -212,7 +210,11 @@ pub fn in_incr_comp_dir(incr_comp_session_dir: &Path, file_name: &str) -> PathBu
 /// The garbage collection will take care of it.
 ///
 /// [`rustc_interface::queries::dep_graph`]: ../../rustc_interface/struct.Queries.html#structfield.dep_graph
-pub(crate) fn prepare_session_directory(sess: &Session, crate_name: Symbol) {
+pub(crate) fn prepare_session_directory(
+    sess: &Session,
+    crate_name: Symbol,
+    stable_crate_id: StableCrateId,
+) {
     if sess.opts.incremental.is_none() {
         return;
     }
@@ -222,7 +224,7 @@ pub(crate) fn prepare_session_directory(sess: &Session, crate_name: Symbol) {
     debug!("prepare_session_directory");
 
     // {incr-comp-dir}/{crate-name-and-disambiguator}
-    let crate_dir = crate_path(sess, crate_name);
+    let crate_dir = crate_path(sess, crate_name, stable_crate_id);
     debug!("crate-dir: {}", crate_dir.display());
     create_dir(sess, &crate_dir, "crate");
 
@@ -595,17 +597,9 @@ fn string_to_timestamp(s: &str) -> Result<SystemTime, &'static str> {
     Ok(UNIX_EPOCH + duration)
 }
 
-fn crate_path(sess: &Session, crate_name: Symbol) -> PathBuf {
+fn crate_path(sess: &Session, crate_name: Symbol, stable_crate_id: StableCrateId) -> PathBuf {
     let incr_dir = sess.opts.incremental.as_ref().unwrap().clone();
 
-    let crate_types = collect_crate_types(sess, &[]);
-    let stable_crate_id = StableCrateId::new(
-        crate_name,
-        crate_types.contains(&CrateType::Executable),
-        sess.opts.cg.metadata.clone(),
-        sess.cfg_version,
-    );
-
     let crate_name =
         format!("{crate_name}-{}", stable_crate_id.as_u64().to_base_fixed_len(CASE_INSENSITIVE));
     incr_dir.join(crate_name)
diff --git a/compiler/rustc_incremental/src/persist/load.rs b/compiler/rustc_incremental/src/persist/load.rs
index 0e646b136c45..1b2a283a1a0d 100644
--- a/compiler/rustc_incremental/src/persist/load.rs
+++ b/compiler/rustc_incremental/src/persist/load.rs
@@ -10,8 +10,8 @@ use rustc_middle::dep_graph::{DepGraph, DepsType, SerializedDepGraph, WorkProduc
 use rustc_middle::query::on_disk_cache::OnDiskCache;
 use rustc_serialize::Decodable;
 use rustc_serialize::opaque::MemDecoder;
-use rustc_session::Session;
 use rustc_session::config::IncrementalStateAssertion;
+use rustc_session::{Session, StableCrateId};
 use rustc_span::Symbol;
 use tracing::{debug, warn};
 
@@ -208,9 +208,14 @@ pub fn load_query_result_cache(sess: &Session) -> Option<OnDiskCache> {
 
 /// Setups the dependency graph by loading an existing graph from disk and set up streaming of a
 /// new graph to an incremental session directory.
-pub fn setup_dep_graph(sess: &Session, crate_name: Symbol, deps: &DepsType) -> DepGraph {
+pub fn setup_dep_graph(
+    sess: &Session,
+    crate_name: Symbol,
+    stable_crate_id: StableCrateId,
+    deps: &DepsType,
+) -> DepGraph {
     // `load_dep_graph` can only be called after `prepare_session_directory`.
-    prepare_session_directory(sess, crate_name);
+    prepare_session_directory(sess, crate_name, stable_crate_id);
 
     let res = sess.opts.build_dep_graph().then(|| load_dep_graph(sess, deps));
 
diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 03b8b61bbc0a..08659f8511d5 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -936,7 +936,7 @@ pub fn create_and_enter_global_ctxt<T, F: for<'tcx> FnOnce(TyCtxt<'tcx>) -> T>(
     let outputs = util::build_output_filenames(&pre_configured_attrs, sess);
 
     let dep_type = DepsType { dep_names: rustc_query_impl::dep_kind_names() };
-    let dep_graph = setup_dep_graph(sess, crate_name, &dep_type);
+    let dep_graph = setup_dep_graph(sess, crate_name, stable_crate_id, &dep_type);
 
     let cstore =
         FreezeLock::new(Box::new(CStore::new(compiler.codegen_backend.metadata_loader())) as _);