From f5ae76e64dab4ebd7d2eb670d6c79491d66d5266 Mon Sep 17 00:00:00 2001
From: LagoLunatic <LagoLunatic@users.noreply.github.com>
Date: Fri, 10 Jul 2026 01:30:03 -0400
Subject: [PATCH] ARM: Fix index out of bounds error when there are no mapping
 symbols (#359)

---
 objdiff-core/src/arch/arm.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/objdiff-core/src/arch/arm.rs b/objdiff-core/src/arch/arm.rs
index 78e93b8..4838ed2 100644
--- a/objdiff-core/src/arch/arm.rs
+++ b/objdiff-core/src/arch/arm.rs
@@ -183,7 +183,7 @@ impl Arch for ArchArm {
         let mapping_symbols = self
             .disasm_modes
             .get(&section_index)
-            .map(|x| x.as_slice())
+            .map(|x| if x.is_empty() { &fallback_mappings } else { x.as_slice() })
             .unwrap_or(&fallback_mappings);
         let first_mapping_idx = mapping_symbols
             .binary_search_by_key(&start_addr, |x| x.address)