From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 compiler/rustc_middle/src/util/bug.rs | 54 +++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 compiler/rustc_middle/src/util/bug.rs

(limited to 'compiler/rustc_middle/src/util/bug.rs')

diff --git a/compiler/rustc_middle/src/util/bug.rs b/compiler/rustc_middle/src/util/bug.rs
new file mode 100644
index 000000000..fd7045d6a
--- /dev/null
+++ b/compiler/rustc_middle/src/util/bug.rs
@@ -0,0 +1,54 @@
+// These functions are used by macro expansion for bug! and span_bug!
+
+use crate::ty::{tls, TyCtxt};
+use rustc_errors::MultiSpan;
+use rustc_span::Span;
+use std::fmt;
+use std::panic::{panic_any, Location};
+
+#[cold]
+#[inline(never)]
+#[track_caller]
+pub fn bug_fmt(args: fmt::Arguments<'_>) -> ! {
+    // this wrapper mostly exists so I don't have to write a fully
+    // qualified path of None::<Span> inside the bug!() macro definition
+    opt_span_bug_fmt(None::<Span>, args, Location::caller());
+}
+
+#[cold]
+#[inline(never)]
+#[track_caller]
+pub fn span_bug_fmt<S: Into<MultiSpan>>(span: S, args: fmt::Arguments<'_>) -> ! {
+    opt_span_bug_fmt(Some(span), args, Location::caller());
+}
+
+#[track_caller]
+fn opt_span_bug_fmt<S: Into<MultiSpan>>(
+    span: Option<S>,
+    args: fmt::Arguments<'_>,
+    location: &Location<'_>,
+) -> ! {
+    tls::with_opt(move |tcx| {
+        let msg = format!("{}: {}", location, args);
+        match (tcx, span) {
+            (Some(tcx), Some(span)) => tcx.sess.diagnostic().span_bug(span, &msg),
+            (Some(tcx), None) => tcx.sess.diagnostic().bug(&msg),
+            (None, _) => panic_any(msg),
+        }
+    });
+    unreachable!();
+}
+
+/// A query to trigger a `delay_span_bug`. Clearly, if one has a `tcx` one can already trigger a
+/// `delay_span_bug`, so what is the point of this? It exists to help us test `delay_span_bug`'s
+/// interactions with the query system and incremental.
+pub fn trigger_delay_span_bug(tcx: TyCtxt<'_>, key: rustc_hir::def_id::DefId) {
+    tcx.sess.delay_span_bug(
+        tcx.def_span(key),
+        "delayed span bug triggered by #[rustc_error(delay_span_bug_from_inside_query)]",
+    );
+}
+
+pub fn provide(providers: &mut crate::ty::query::Providers) {
+    *providers = crate::ty::query::Providers { trigger_delay_span_bug, ..*providers };
+}
-- 
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