fix failure to detect a too-big-type after adding padding

2023-10-27 13:19:24 +02:00
parent 707d8c3f1b
commit 2ef5897a89
4 changed files with 34 additions and 0 deletions
--- a/compiler/rustc_ty_utils/src/layout_sanity_check.rs
+++ b/compiler/rustc_ty_utils/src/layout_sanity_check.rs
@@ -19,6 +19,9 @@ pub(super) fn sanity_check_layout<'tcx>(
    if layout.size.bytes() % layout.align.abi.bytes() != 0 {
        bug!("size is not a multiple of align, in the following layout:\n{layout:#?}");
    }
+    if layout.size.bytes() >= cx.tcx.data_layout.obj_size_bound() {
+        bug!("size is too large, in the following layout:\n{layout:#?}");
+    }

    if !cfg!(debug_assertions) {
        // Stop here, the rest is kind of expensive.