From cd1c7736614dcde9fe19961c83d935adedf98662 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Fri, 30 Jan 2026 14:45:35 +1100
Subject: [PATCH] Remove `lift_query_info`.

It doesn't use `self`, which means it doesn't need to be part of the
`QueryContext` trait; we can just call `extract` directly where
necessary.
---
 compiler/rustc_query_impl/src/plumbing.rs         | 12 +-----------
 compiler/rustc_query_system/src/query/job.rs      |  9 +++------
 compiler/rustc_query_system/src/query/mod.rs      |  6 ++----
 compiler/rustc_query_system/src/query/plumbing.rs | 10 +++++-----
 4 files changed, 11 insertions(+), 26 deletions(-)

diff --git a/compiler/rustc_query_impl/src/plumbing.rs b/compiler/rustc_query_impl/src/plumbing.rs
index 2d4e10a0380c..da11623d77b7 100644
--- a/compiler/rustc_query_impl/src/plumbing.rs
+++ b/compiler/rustc_query_impl/src/plumbing.rs
@@ -104,13 +104,6 @@ impl<'tcx> QueryContext<'tcx> for QueryCtxt<'tcx> {
         if complete { Ok(jobs) } else { Err(jobs) }
     }
 
-    fn lift_query_info(
-        self,
-        info: &QueryStackDeferred<'tcx>,
-    ) -> rustc_query_system::query::QueryStackFrameExtra {
-        info.extract()
-    }
-
     // Interactions with on_disk_cache
     fn load_side_effect(
         self,
@@ -174,10 +167,7 @@ impl<'tcx> QueryContext<'tcx> for QueryCtxt<'tcx> {
 
         self.tcx.sess.dcx().emit_fatal(QueryOverflow {
             span: info.job.span,
-            note: QueryOverflowNote {
-                desc: self.lift_query_info(&info.query.info).description,
-                depth,
-            },
+            note: QueryOverflowNote { desc: info.query.info.extract().description, depth },
             suggested_limit,
             crate_name: self.tcx.crate_name(LOCAL_CRATE),
         });
diff --git a/compiler/rustc_query_system/src/query/job.rs b/compiler/rustc_query_system/src/query/job.rs
index 177bcd63cbc6..3affb23d3022 100644
--- a/compiler/rustc_query_system/src/query/job.rs
+++ b/compiler/rustc_query_system/src/query/job.rs
@@ -27,11 +27,8 @@ pub struct QueryInfo<I> {
 }
 
 impl<'tcx> QueryInfo<QueryStackDeferred<'tcx>> {
-    pub(crate) fn lift<Qcx: QueryContext<'tcx>>(
-        &self,
-        qcx: Qcx,
-    ) -> QueryInfo<QueryStackFrameExtra> {
-        QueryInfo { span: self.span, query: self.query.lift(qcx) }
+    pub(crate) fn lift(&self) -> QueryInfo<QueryStackFrameExtra> {
+        QueryInfo { span: self.span, query: self.query.lift() }
     }
 }
 
@@ -628,7 +625,7 @@ pub fn print_query_stack<'tcx, Qcx: QueryContext<'tcx>>(
         let Some(query_info) = query_map.get(&query) else {
             break;
         };
-        let query_extra = qcx.lift_query_info(&query_info.query.info);
+        let query_extra = query_info.query.info.extract();
         if Some(count_printed) < limit_frames || limit_frames.is_none() {
             // Only print to stderr as many stack frames as `num_frames` when present.
             dcx.struct_failure_note(format!(
diff --git a/compiler/rustc_query_system/src/query/mod.rs b/compiler/rustc_query_system/src/query/mod.rs
index 63202429679d..e40dcf2daf35 100644
--- a/compiler/rustc_query_system/src/query/mod.rs
+++ b/compiler/rustc_query_system/src/query/mod.rs
@@ -70,9 +70,9 @@ impl<'tcx> QueryStackFrame<QueryStackDeferred<'tcx>> {
         Self { info, def_id, dep_kind, hash, def_id_for_ty_in_cycle }
     }
 
-    fn lift<Qcx: QueryContext<'tcx>>(&self, qcx: Qcx) -> QueryStackFrame<QueryStackFrameExtra> {
+    fn lift(&self) -> QueryStackFrame<QueryStackFrameExtra> {
         QueryStackFrame {
-            info: qcx.lift_query_info(&self.info),
+            info: self.info.extract(),
             dep_kind: self.dep_kind,
             hash: self.hash,
             def_id: self.def_id,
@@ -168,8 +168,6 @@ pub trait QueryContext<'tcx>: HasDepContext {
 
     fn collect_active_jobs(self, require_complete: bool) -> Result<QueryMap<'tcx>, QueryMap<'tcx>>;
 
-    fn lift_query_info(self, info: &QueryStackDeferred<'tcx>) -> QueryStackFrameExtra;
-
     /// Load a side effect associated to the node in the previous session.
     fn load_side_effect(
         self,
diff --git a/compiler/rustc_query_system/src/query/plumbing.rs b/compiler/rustc_query_system/src/query/plumbing.rs
index 98bbd3ebc4a0..04b62daa86b4 100644
--- a/compiler/rustc_query_system/src/query/plumbing.rs
+++ b/compiler/rustc_query_system/src/query/plumbing.rs
@@ -253,10 +253,10 @@ pub struct CycleError<I = QueryStackFrameExtra> {
 }
 
 impl<'tcx> CycleError<QueryStackDeferred<'tcx>> {
-    fn lift<Qcx: QueryContext<'tcx>>(&self, qcx: Qcx) -> CycleError<QueryStackFrameExtra> {
+    fn lift(&self) -> CycleError<QueryStackFrameExtra> {
         CycleError {
-            usage: self.usage.as_ref().map(|(span, frame)| (*span, frame.lift(qcx))),
-            cycle: self.cycle.iter().map(|info| info.lift(qcx)).collect(),
+            usage: self.usage.as_ref().map(|(span, frame)| (*span, frame.lift())),
+            cycle: self.cycle.iter().map(|info| info.lift()).collect(),
         }
     }
 }
@@ -297,7 +297,7 @@ where
     let query_map = qcx.collect_active_jobs(false).ok().expect("failed to collect active queries");
 
     let error = try_execute.find_cycle_in_stack(query_map, &qcx.current_query_job(), span);
-    (mk_cycle(query, qcx, error.lift(qcx)), None)
+    (mk_cycle(query, qcx, error.lift()), None)
 }
 
 #[inline(always)]
@@ -345,7 +345,7 @@ where
 
             (v, Some(index))
         }
-        Err(cycle) => (mk_cycle(query, qcx, cycle.lift(qcx)), None),
+        Err(cycle) => (mk_cycle(query, qcx, cycle.lift()), None),
     }
 }