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-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
index dc59e9349b0..17a9630c655 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
@@ -216,6 +216,8 @@ fn build_pointer_or_reference_di_node<'ll, 'tcx>(
                     //        need to make sure that we don't break existing debuginfo consumers
                     //        by doing that (at least not without a warning period).
                     let layout_type = if ptr_type.is_box() {
+                        // The assertion at the start of this function ensures we have a ZST allocator.
+                        // We'll make debuginfo "skip" all ZST allocators, not just the default allocator.
                         Ty::new_mut_ptr(cx.tcx, pointee_type)
                     } else {
                         ptr_type