[COMMITTED 099/146] gccrs: fix ICE during HIR dump

[arthur . cohen]

From: Philip Herron <herron.phi...@googlemail.com>

These hir nodes have optional expressions which need guarded

gcc/rust/ChangeLog:

        * hir/rust-hir-dump.cc (Dump::do_qualifiedpathtype): add guard
        (Dump::do_traitfunctiondecl): likewise
        (Dump::visit): likewise

Signed-off-by: Philip Herron <herron.phi...@googlemail.com>
---
 gcc/rust/hir/rust-hir-dump.cc | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/gcc/rust/hir/rust-hir-dump.cc b/gcc/rust/hir/rust-hir-dump.cc
index 2590eed19ae..5acf53e9296 100644
--- a/gcc/rust/hir/rust-hir-dump.cc
+++ b/gcc/rust/hir/rust-hir-dump.cc
@@ -404,7 +404,8 @@ Dump::do_qualifiedpathtype (QualifiedPathType &e)
   do_mappings (e.get_mappings ());
   visit_field ("type", e.get_type ());
 
-  visit_field ("trait", e.get_trait ());
+  if (e.has_as_clause ())
+    visit_field ("trait", e.get_trait ());
 }
 
 void
@@ -521,7 +522,8 @@ Dump::do_traitfunctiondecl (TraitFunctionDecl &e)
   else
     put_field ("function_params", "empty");
 
-  visit_field ("return_type", e.get_return_type ());
+  if (e.has_return_type ())
+    visit_field ("return_type", e.get_return_type ());
 
   if (e.has_where_clause ())
     put_field ("where_clause", e.get_where_clause ().as_string ());
@@ -1295,7 +1297,8 @@ Dump::visit (BreakExpr &e)
   else
     put_field ("label", "none");
 
-  visit_field ("break_expr ", e.get_expr ());
+  if (e.has_break_expr ())
+    visit_field ("break_expr ", e.get_expr ());
 
   end ("BreakExpr");
 }
-- 
2.45.2