Auto merge of #129275 - matthiaskrgr:rollup-qv64hg6, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #129194 (Fix bootstrap test `detect_src_and_out` on Windows)
 - #129217 (safe transmute: check lifetimes)
 - #129223 ( Fix wrong argument for `get_fn_decl`)
 - #129235 (Check that `#[may_dangle]` is properly applied)
 - #129245 (Fix a typo in `rustc_hir` doc comment)
 - #129271 (Prevent double panic in query system, improve diagnostics)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 8 insertions, 2 deletions

diff --git a/compiler/rustc_query_impl/src/plumbing.rs b/compiler/rustc_query_impl/src/plumbing.rs
index b9e700c1938..c064b2bd6c1 100644
--- a/compiler/rustc_query_impl/src/plumbing.rs
+++ b/compiler/rustc_query_impl/src/plumbing.rs
@@ -702,11 +702,17 @@ macro_rules! define_queries {
                     let name = stringify!($name);
                     $crate::plumbing::create_query_frame(tcx, rustc_middle::query::descs::$name, key, kind, name)
                 };
-                tcx.query_system.states.$name.try_collect_active_jobs(
+                let res = tcx.query_system.states.$name.try_collect_active_jobs(
                     tcx,
                     make_query,
                     qmap,
-                ).unwrap();
+                );
+                // this can be called during unwinding, and the function has a `try_`-prefix, so
+                // don't `unwrap()` here, just manually check for `None` and do best-effort error
+                // reporting.
+                if res.is_none() {
+                    tracing::warn!("Failed to collect active jobs for query with name `{}`!", stringify!($name));
+                }
             }
 
             pub fn alloc_self_profile_query_strings<'tcx>(tcx: TyCtxt<'tcx>, string_cache: &mut QueryKeyStringCache) {