From 8bd7cc7e88d979c801d69357fc2c34db3beb6023 Mon Sep 17 00:00:00 2001
From: Ben Clayton <bclayton@google.com>
Date: Wed, 7 Apr 2021 15:32:31 +0000
Subject: [PATCH] ast::Variable: Fix nullptr access in info_to_str

With type inference, declared_type_ may be null.
Check it is not null before calling type_name().

Change-Id: I3b7630286b75aa9d021d9cf54eecedc3287a62f2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/46872
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
---
 src/ast/variable.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/ast/variable.cc b/src/ast/variable.cc
index 793cb974ad..3c7d5a0d92 100644
--- a/src/ast/variable.cc
+++ b/src/ast/variable.cc
@@ -125,7 +125,9 @@ void Variable::info_to_str(const semantic::Info& sem,
   out << (var_sem ? var_sem->StorageClass() : declared_storage_class())
       << std::endl;
   make_indent(out, indent);
-  out << declared_type_->type_name() << std::endl;
+  if (declared_type_) {
+    out << declared_type_->type_name() << std::endl;
+  }
 }
 
 void Variable::constructor_to_str(const semantic::Info& sem,