Auto merge of #93511 - cjgillot:query-copy, r=oli-obk

Ensure that queries only return Copy types.

This should pervent the perf footgun of returning a result with an expensive `Clone` impl (like a `Vec` of a hash map).

I went for the stupid solution of allocating on an arena everything that was not `Copy`. Some query results could be made Copy easily, but I did not really investigate.

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 7a3d77466c5..f5a4e11de16 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -658,13 +658,13 @@ fn write_out_deps(
             boxed_resolver.borrow_mut().access(|resolver| {
                 for cnum in resolver.cstore().crates_untracked() {
                     let source = resolver.cstore().crate_source_untracked(cnum);
-                    if let Some((path, _)) = source.dylib {
+                    if let Some((path, _)) = &source.dylib {
                         files.push(escape_dep_filename(&path.display().to_string()));
                     }
-                    if let Some((path, _)) = source.rlib {
+                    if let Some((path, _)) = &source.rlib {
                         files.push(escape_dep_filename(&path.display().to_string()));
                     }
-                    if let Some((path, _)) = source.rmeta {
+                    if let Some((path, _)) = &source.rmeta {
                         files.push(escape_dep_filename(&path.display().to_string()));
                     }
                 }