From 6d41ea01355b685294f4807ccb67a6adb251f680 Mon Sep 17 00:00:00 2001
From: Jeremy Rifkin <51220084+jeremy-rifkin@users.noreply.github.com>
Date: Mon, 17 Feb 2025 22:59:48 -0600
Subject: [PATCH] Fix UB due to forming a reference to a packed struct member

---
 src/symbols/dwarf/dwarf_resolver.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/symbols/dwarf/dwarf_resolver.cpp b/src/symbols/dwarf/dwarf_resolver.cpp
index 3d04353..b11d4b6 100644
--- a/src/symbols/dwarf/dwarf_resolver.cpp
+++ b/src/symbols/dwarf/dwarf_resolver.cpp
@@ -41,7 +41,10 @@ namespace libdwarf {
     constexpr bool trace_dwarf = false;
 
     // sorted range entries for dies
-    template<typename T>
+    template<
+        typename T,
+        typename std::enable_if<std::is_trivially_copyable<T>::value && sizeof(T) <= 16, int>::type = 0
+    >
     class die_cache {
     public:
         struct die_handle {
@@ -95,7 +98,7 @@ namespace libdwarf {
 
         struct die_and_data {
             const die_object& die;
-            const T& data;
+            T data;
         };
         template<typename Ret = const die_object&>
         auto make_lookup_result(typename std::vector<range_entry>::const_iterator vec_it) const