compiler: propagate array length error marker farther Fixes golang/go#53639 Change-Id: I4d020d797f4ba5fb57f88aeaeb4188b1dabd3b9b Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/415936 Reviewed-by: Than McIntosh <thanm@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>

diff --git a/go/expressions.cc b/go/expressions.cc
index 00d35a9..2492d9f 100644
--- a/go/expressions.cc
+++ b/go/expressions.cc

@@ -8486,6 +8486,11 @@
 	     pa != this->args()->end();
 	     ++pa)
 	  {
+	    if ((*pa)->is_error_expression())
+	      {
+		go_assert(saw_errors());
+		return Expression::make_error(loc);
+	      }
 	    if ((*pa)->is_nil_expression())
 	      {
 		Expression* nil = Expression::make_nil(loc);
@@ -13391,6 +13396,7 @@
   if (array_type == NULL)
     {
       go_assert(this->array_->type()->is_error());
+      this->set_is_error();
       return;
     }
 

diff --git a/go/types.cc b/go/types.cc
index 4995283..9f34801 100644
--- a/go/types.cc
+++ b/go/types.cc

@@ -7429,7 +7429,10 @@
 Array_type::do_verify()
 {
   if (this->element_type()->is_error_type())
-    return false;
+    {
+      this->set_is_error();
+      return false;
+    }
   if (!this->verify_length())
     {
       this->length_ = Expression::make_error(this->length_->location());