stage1: Fix crash in *[N]T to []T conversion with zst

Prevent the crash by not making the codegen try to access the
non-existing ptr field in the slice.

Closes #6951

1 files changed, 6 insertions, 0 deletions

diff --git a/test/stage1/behavior/cast.zig b/test/stage1/behavior/cast.zig
index d39b20a7e1..6d1e8c29ab 100644
--- a/test/stage1/behavior/cast.zig
+++ b/test/stage1/behavior/cast.zig
@@ -908,3 +908,9 @@ test "cast from ?[*]T to ??[*]T" {
     const a: ??[*]u8 = @as(?[*]u8, null);
     expect(a != null and a.? == null);
 }
+
+test "cast between *[N]void and []void" {
+    var a: [4]void = undefined;
+    var b: []void = &a;
+    expect(b.len == 4);
+}