From 0777e98bfe89eadeaa0e34a2ad07cf61cdf5b26a Mon Sep 17 00:00:00 2001
From: Jacob Young <jacobly0@users.noreply.github.com>
Date: Thu, 1 Jun 2023 01:44:39 -0400
Subject: Sema: disable repeated aggregate storage use with mismatching
 sentinel

The InternPool implementation was not written to support this, but
that could be changed and this check removed in the future.
---
 src/Sema.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Sema.zig b/src/Sema.zig
index 0cc657ba01..a0d7c483d9 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -13094,7 +13094,7 @@ fn zirArrayMul(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Ai
         const val = v: {
             // Optimization for the common pattern of a single element repeated N times, such
             // as zero-filling a byte array.
-            if (lhs_len == 1) {
+            if (lhs_len == 1 and lhs_info.sentinel == null) {
                 const elem_val = try lhs_sub_val.elemValue(mod, 0);
                 break :v try mod.intern(.{ .aggregate = .{
                     .ty = result_ty.toIntern(),
-- 
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