x86_64: fix miscompilations

Closes #17618
2023-11-03 12:12:36 -04:00
parent 6553359f39
commit 095c4294aa
2 changed files with 102 additions and 29 deletions
--- a/lib/std/multi_array_list.zig
+++ b/lib/std/multi_array_list.zig
@@ -106,7 +106,7 @@ pub fn MultiArrayList(comptime T: type) type {
            }

            pub fn toMultiArrayList(self: Slice) Self {
-                if (self.ptrs.len == 0) {
+                if (self.ptrs.len == 0 or self.capacity == 0) {
                    return .{};
                }
                const unaligned_ptr = self.ptrs[sizes.fields[0]];