gccrs: Fix crash in hir dump as labels are optional

gcc/rust/ChangeLog:

	* hir/rust-hir-dump.cc (Dump::visit): add guard for optional label

Signed-off-by: Philip Herron <herron.philip@googlemail.com>

diff --git a/gcc/rust/hir/rust-hir-dump.cc b/gcc/rust/hir/rust-hir-dump.cc
index 468d855279619b8490b335d96d251cd2c15209de..c4523e646b2c28c10abcb4101058d00a731f3833 100644 (file)
--- a/gcc/rust/hir/rust-hir-dump.cc
+++ b/gcc/rust/hir/rust-hir-dump.cc
@@ -1284,7 +1284,9 @@ Dump::visit (BlockExpr &e)
   do_expr (e);
   do_inner_attrs (e);
   put_field ("tail_reachable", std::to_string (e.is_tail_reachable ()));
-  put_field ("label", e.get_label ().as_string ());
+
+  if (e.has_label ())
+    put_field ("label", e.get_label ().as_string ());
 
   visit_collection ("statements", e.get_statements ());