From e8887829cab0eb1d4a1d578efd1c75a55ab2d060 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Wed, 25 Sep 2024 19:35:27 -0700
Subject: [PATCH] compile error instead of crash when root panic fn wrong

---
 src/Sema.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Sema.zig b/src/Sema.zig
index b00b44a755..0a66b04deb 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -7321,7 +7321,8 @@ fn callPanic(
     }
     const panic_cause_ty = try pt.getBuiltinType("PanicCause");
     const panic_cause = try unionInitFromEnumTag(sema, block, call_src, panic_cause_ty, @intFromEnum(tag), payload);
-    const panic_fn = try pt.getBuiltin("panic");
+    try preparePanic(sema, block, call_src);
+    const panic_fn = Air.internedToRef(zcu.panic_func_index);
     const err_return_trace = try sema.getErrorReturnTrace(block);
     const opt_usize_ty = try pt.optionalType(.usize_type);
     const null_usize = try pt.nullValue(opt_usize_ty);