fix loops in unwind code in MSVC

I'm not sure how well this works, but it's worth a try.
rust-lang · May 28, 2017 · 6548aef · 6548aef
1 parent 5576770
commit 6548aef
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/librustc_trans/mir/analyze.rs b/src/librustc_trans/mir/analyze.rs
@@ -260,7 +260,9 @@ pub fn cleanup_kinds<'a, 'tcx>(mir: &mir::Mir<'tcx>) -> IndexVec<mir::BasicBlock
                         result[succ] = CleanupKind::Internal { funclet: funclet };
                     }
                     CleanupKind::Funclet => {
-                        set_successor(funclet, succ);
+                        if funclet != succ {
+                            set_successor(funclet, succ);
+                        }
                     }
                     CleanupKind::Internal { funclet: succ_funclet } => {
                         if funclet != succ_funclet {