From 2f654ca6dd7c86f701bc0c17158eb538f4032b02 Mon Sep 17 00:00:00 2001
From: Brian Carroll <brian.carroll.ireland@gmail.com>
Date: Fri, 8 Apr 2022 16:52:36 +0100
Subject: [PATCH] wasm: more meaningful error when NameSection is missing

---
 compiler/gen_wasm/src/wasm_module/sections.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compiler/gen_wasm/src/wasm_module/sections.rs b/compiler/gen_wasm/src/wasm_module/sections.rs
index 4d30809e1f..12a3f2da24 100644
--- a/compiler/gen_wasm/src/wasm_module/sections.rs
+++ b/compiler/gen_wasm/src/wasm_module/sections.rs
@@ -1155,6 +1155,10 @@ impl<'a> NameSection<'a> {
     }
 
     pub fn parse(arena: &'a Bump, module_bytes: &[u8], cursor: &mut usize) -> Self {
+        if *cursor >= module_bytes.len() {
+            internal_error!("NameSection not found in preloaded object file");
+        }
+
         // Custom section ID
         let section_id_byte = module_bytes[*cursor];
         if section_id_byte != Self::ID as u8 {