From 91b15b6dcfd2d394e707fdfaa10d563bbf2f8198 Mon Sep 17 00:00:00 2001
From: Yureka <yuka@yuka.dev>
Date: Sat, 7 Aug 2021 09:43:22 +0200
Subject: [PATCH] llvm_13: workaround for llvm bug 50611

https://bugs.llvm.org/show_bug.cgi?id=50611
---
 pkgs/development/compilers/llvm/13/llvm/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/compilers/llvm/13/llvm/default.nix b/pkgs/development/compilers/llvm/13/llvm/default.nix
index daf4cfe808b6..a15bcc872a6d 100644
--- a/pkgs/development/compilers/llvm/13/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/13/llvm/default.nix
@@ -52,6 +52,13 @@ in stdenv.mkDerivation (rec {
 
   patches = [
     ./gnu-install-dirs.patch
+
+    # Fix random compiler crashes: https://bugs.llvm.org/show_bug.cgi?id=50611
+    (fetchpatch {
+      url = "https://raw.githubusercontent.com/archlinux/svntogit-packages/4764a4f8c920912a2bfd8b0eea57273acfe0d8a8/trunk/no-strict-aliasing-DwarfCompileUnit.patch";
+      sha256 = "18l6mrvm2vmwm77ckcnbjvh6ybvn72rhrb799d4qzwac4x2ifl7g";
+      stripLen = 1;
+    })
   ] ++ lib.optional enablePolly ./gnu-install-dirs-polly.patch;
 
   postPatch = optionalString stdenv.isDarwin ''