X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;ds=sidebyside;f=compiler%2Frustc_interface%2Fsrc%2Fcallbacks.rs;h=ee0552d77ceee8080eab5dd43ed6f63f115a2e9f;hb=b2448f9f9c8f22296e01072613fc17f69776280f;hp=76442de69d35147d7d7634c14d25e2cbef4dcf1b;hpb=9a677674b3364cab71fd49793aa5cc90b9dc5322;p=rust.git

diff --git a/compiler/rustc_interface/src/callbacks.rs b/compiler/rustc_interface/src/callbacks.rs
index 76442de69d3..ee0552d77ce 100644
--- a/compiler/rustc_interface/src/callbacks.rs
+++ b/compiler/rustc_interface/src/callbacks.rs
@@ -10,6 +10,7 @@
 //! origin crate when the `TyCtxt` is not present in TLS.
 
 use rustc_errors::{Diagnostic, TRACK_DIAGNOSTICS};
+use rustc_middle::dep_graph::TaskDepsRef;
 use rustc_middle::ty::tls;
 use std::fmt;
 
@@ -26,14 +27,22 @@ fn track_span_parent(def_id: rustc_span::def_id::LocalDefId) {
 /// This is a callback from `rustc_ast` as it cannot access the implicit state
 /// in `rustc_middle` otherwise. It is used when diagnostic messages are
 /// emitted and stores them in the current query, if there is one.
-fn track_diagnostic(diagnostic: &Diagnostic) {
+fn track_diagnostic(diagnostic: &mut Diagnostic, f: &mut dyn FnMut(&mut Diagnostic)) {
     tls::with_context_opt(|icx| {
         if let Some(icx) = icx {
             if let Some(diagnostics) = icx.diagnostics {
                 let mut diagnostics = diagnostics.lock();
                 diagnostics.extend(Some(diagnostic.clone()));
+                std::mem::drop(diagnostics);
             }
+
+            // Diagnostics are tracked, we can ignore the dependency.
+            let icx = tls::ImplicitCtxt { task_deps: TaskDepsRef::Ignore, ..icx.clone() };
+            return tls::enter_context(&icx, move |_| (*f)(diagnostic));
         }
+
+        // In any other case, invoke diagnostics anyway.
+        (*f)(diagnostic);
     })
 }
 
@@ -55,5 +64,5 @@ fn def_id_debug(def_id: rustc_hir::def_id::DefId, f: &mut fmt::Formatter<'_>) ->
 pub fn setup_callbacks() {
     rustc_span::SPAN_TRACK.swap(&(track_span_parent as fn(_)));
     rustc_hir::def_id::DEF_ID_DEBUG.swap(&(def_id_debug as fn(_, &mut fmt::Formatter<'_>) -> _));
-    TRACK_DIAGNOSTICS.swap(&(track_diagnostic as fn(&_)));
+    TRACK_DIAGNOSTICS.swap(&(track_diagnostic as _));
 }