From c4c808769199a86065f7b0b291014fd4267b3210 Mon Sep 17 00:00:00 2001
From: Uyiosa Iyekekpolor <uyiosaben@gmail.com>
Date: Wed, 13 May 2026 15:38:37 -0400
Subject: [PATCH] [z/OS] Fix z/OS ASAN test failure

---
 llvm/lib/Object/Archive.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/lib/Object/Archive.cpp b/llvm/lib/Object/Archive.cpp
index d95f9103747aa..ae54338bb9a71 100644
--- a/llvm/lib/Object/Archive.cpp
+++ b/llvm/lib/Object/Archive.cpp
@@ -390,6 +390,10 @@ ZOSArchiveMemberHeader::ZOSArchiveMemberHeader(const Archive *Parent,
                                                uint64_t Size, Error *Err)
     : ArchiveMemberHeader(Parent, RawHeaderPtr, Size, Err) {
   ErrorAsOutParameter ErrAsOutParam(Err);
+  // If the base class constructor already detected an error
+  // do not attempt to read header fields
+  if (Err && *Err)
+    return;
   setMemberHeaderStrings(Err, Size);
 }