From 6912631d3ead427848a559ef5af66ab6f30e79ed Mon Sep 17 00:00:00 2001
From: Tawan Muadmuenwai <modhanami@gmail.com>
Date: Mon, 15 Sep 2025 21:24:57 +0700
Subject: Add span for struct tail recursion limit error

---
 compiler/rustc_const_eval/src/const_eval/valtrees.rs | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'compiler/rustc_const_eval/src')

diff --git a/compiler/rustc_const_eval/src/const_eval/valtrees.rs b/compiler/rustc_const_eval/src/const_eval/valtrees.rs
index 37c6c4a61d8..7c41258ebfe 100644
--- a/compiler/rustc_const_eval/src/const_eval/valtrees.rs
+++ b/compiler/rustc_const_eval/src/const_eval/valtrees.rs
@@ -1,6 +1,7 @@
 use rustc_abi::{BackendRepr, FieldIdx, VariantIdx};
 use rustc_data_structures::stack::ensure_sufficient_stack;
 use rustc_middle::mir::interpret::{EvalToValTreeResult, GlobalId, ValTreeCreationError};
+use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::layout::{LayoutCx, TyAndLayout};
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_middle::{bug, mir};
@@ -196,6 +197,7 @@ fn reconstruct_place_meta<'tcx>(
     // Traverse the type, and update `last_valtree` as we go.
     let tail = tcx.struct_tail_raw(
         layout.ty,
+        &ObligationCause::dummy(),
         |ty| ty,
         || {
             let branches = last_valtree.unwrap_branch();
-- 
cgit 1.4.1-3-g733a5