Auto merge of #86492 - hyd-dev:no-mangle-method, r=petrochenkov

[rust.git] / compiler / rustc_lint / src / non_fmt_panic.rs

diff --git a/compiler/rustc_lint/src/non_fmt_panic.rs b/compiler/rustc_lint/src/non_fmt_panic.rs
index a32caf1bc433df1cbf94ffa4f3d7322f2ff43ed5..ec53625f10525014264c53f0dc895ec7c858aa19 100644 (file)
--- a/compiler/rustc_lint/src/non_fmt_panic.rs
+++ b/compiler/rustc_lint/src/non_fmt_panic.rs
@@ -2,6 +2,7 @@
 use rustc_ast as ast;
 use rustc_errors::{pluralize, Applicability};
 use rustc_hir as hir;
+use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
 use rustc_parse_format::{ParseMode, Parser, Piece};
 use rustc_session::lint::FutureIncompatibilityReason;
@@ -75,6 +76,11 @@ fn check_panic<'tcx>(cx: &LateContext<'tcx>, f: &'tcx hir::Expr<'tcx>, arg: &'tc
 
     let (span, panic, symbol_str) = panic_call(cx, f);
 
+    if in_external_macro(cx.sess(), span) {
+        // Nothing that can be done about it in the current crate.
+        return;
+    }
+
     // Find the span of the argument to `panic!()`, before expansion in the
     // case of `panic!(some_macro!())`.
     // We don't use source_callsite(), because this `panic!(..)` might itself
@@ -152,6 +158,13 @@ fn check_panic_str<'tcx>(
         return;
     }
 
+    let (span, _, _) = panic_call(cx, f);
+
+    if in_external_macro(cx.sess(), span) && in_external_macro(cx.sess(), arg.span) {
+        // Nothing that can be done about it in the current crate.
+        return;
+    }
+
     let fmt_span = arg.span.source_callsite();
 
     let (snippet, style) = match cx.sess().parse_sess.source_map().span_to_snippet(fmt_span) {
@@ -167,8 +180,6 @@ fn check_panic_str<'tcx>(
         Parser::new(fmt.as_ref(), style, snippet.clone(), false, ParseMode::Format);
     let n_arguments = (&mut fmt_parser).filter(|a| matches!(a, Piece::NextArgument(_))).count();
 
-    let (span, _, _) = panic_call(cx, f);
-
     if n_arguments > 0 && fmt_parser.errors.is_empty() {
         let arg_spans: Vec<_> = match &fmt_parser.arg_places[..] {
             [] => vec![fmt_span],