From 3cff6593e6ab1e1d52df2960e723943542465eed Mon Sep 17 00:00:00 2001
From: Pogobanane <aenderboy@gmx.de>
Date: Fri, 31 May 2024 22:00:20 +0000
Subject: [PATCH] fix name for unnamed undeclared types

type->getAsTagDecl() may return null, e.g. in the following example:

struct Foo {
  struct {
    uint64_t len;
    uint64_t flags;
  } __attribute__((packed)) bars[BARS];
  ...
};
---
 src/common/clang_utils.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/common/clang_utils.cc b/src/common/clang_utils.cc
index f2fce146..38881b9e 100644
--- a/src/common/clang_utils.cc
+++ b/src/common/clang_utils.cc
@@ -150,7 +150,13 @@ std::string to_string(const clang::QualType &type, const clang::ASTContext &ctx,
         result = "(anonymous)";
     else if (util::contains(result, "unnamed struct") ||
         util::contains(result, "unnamed union")) {
-        result = common::get_tag_name(*type->getAsTagDecl());
+        auto declarationTag = type->getAsTagDecl();
+        if (declarationTag == NULL) {
+            result = "(unnamed undeclared)";
+        }
+        else {
+            result = common::get_tag_name(*declarationTag);
+        }
     }
     else if (util::contains(result, "anonymous struct") ||
         util::contains(result, "anonymous union")) {