From 540130650f843f0c6aa79c2a2f29e79b33846994 Mon Sep 17 00:00:00 2001
From: Veikka Tuominen <git@vexu.eu>
Date: Mon, 19 Sep 2022 17:06:57 +0300
Subject: [PATCH] Sema: pass calculated offset to `elemPtrType` in
 `elemPtrSlice`

---
 src/Sema.zig            | 2 +-
 test/behavior/align.zig | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Sema.zig b/src/Sema.zig
index 4402a28100..773b7aa66c 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -22692,7 +22692,7 @@ fn elemPtrSlice(
         break :o index;
     } else null;
 
-    const elem_ptr_ty = try sema.elemPtrType(slice_ty, null);
+    const elem_ptr_ty = try sema.elemPtrType(slice_ty, offset);
 
     if (maybe_undef_slice_val) |slice_val| {
         if (slice_val.isUndef()) {
diff --git a/test/behavior/align.zig b/test/behavior/align.zig
index 51481580cf..5270aa9692 100644
--- a/test/behavior/align.zig
+++ b/test/behavior/align.zig
@@ -564,3 +564,8 @@ test "@alignCast null" {
     const aligned: ?*anyopaque = @alignCast(@alignOf(?*anyopaque), ptr);
     try expect(aligned == null);
 }
+
+test "alignment of slice element" {
+    const a: []align(1024) const u8 = undefined;
+    try expect(@TypeOf(&a[0]) == *align(1024) const u8);
+}