Rollup merge of #94414 - DrMeepster:box_alloc_ice2, r=tmiasko

Fix ICE when using Box<T, A> with large A

A sequel to #94043 that fixes #81270 and #92054 (duplicate).

2 files changed, 23 insertions, 6 deletions

diff --git a/src/test/ui/box/issue-78459-ice.rs b/src/test/ui/box/issue-78459-ice.rs
deleted file mode 100644
index 89f75fea15b..00000000000
--- a/src/test/ui/box/issue-78459-ice.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-// check-pass
-#![feature(allocator_api)]
-
-fn main() {
-    Box::new_in((), &std::alloc::Global);
-}
diff --git a/src/test/ui/box/large-allocator-ice.rs b/src/test/ui/box/large-allocator-ice.rs
new file mode 100644
index 00000000000..3ef1171ff50
--- /dev/null
+++ b/src/test/ui/box/large-allocator-ice.rs
@@ -0,0 +1,23 @@
+// build-pass
+#![feature(allocator_api)]
+
+use std::alloc::Allocator;
+
+struct BigAllocator([usize; 2]);
+
+unsafe impl Allocator for BigAllocator {
+    fn allocate(
+        &self,
+        _: std::alloc::Layout,
+    ) -> Result<std::ptr::NonNull<[u8]>, std::alloc::AllocError> {
+        todo!()
+    }
+    unsafe fn deallocate(&self, _: std::ptr::NonNull<u8>, _: std::alloc::Layout) {
+        todo!()
+    }
+}
+
+fn main() {
+    Box::new_in((), &std::alloc::Global);
+    Box::new_in((), BigAllocator([0; 2]));
+}