From 357c3cf72cfa7f4455ae71ad62816dfcc843746b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Mi=C4=85sko?= <tomasz.miasko@gmail.com>
Date: Mon, 2 Jan 2023 00:00:00 +0000
Subject: [PATCH] Fix handling of dead unwinds in backward analyses

Dead unwinds set contains a head of an unreachable unwind edge.
---
 compiler/rustc_mir_dataflow/src/framework/direction.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_mir_dataflow/src/framework/direction.rs b/compiler/rustc_mir_dataflow/src/framework/direction.rs
index 5ff6b9e7e69b4..077a21fc8afc0 100644
--- a/compiler/rustc_mir_dataflow/src/framework/direction.rs
+++ b/compiler/rustc_mir_dataflow/src/framework/direction.rs
@@ -287,7 +287,7 @@ impl Direction for Backward {
                 | mir::TerminatorKind::InlineAsm { cleanup: Some(unwind), .. }
                     if unwind == bb =>
                 {
-                    if dead_unwinds.map_or(true, |dead| !dead.contains(bb)) {
+                    if dead_unwinds.map_or(true, |dead| !dead.contains(pred)) {
                         propagate(pred, exit_state);
                     }
                 }