Use `iEval ... in ...` somewhere.

9e33557c · Robbert Krebbers · f197e42d · 9e33557c
Commit 9e33557c authored Dec 31, 2017 by Robbert Krebbers
--- a/theories/base_logic/lib/boxes.v
+++ b/theories/base_logic/lib/boxes.v
@@ -209,7 +209,7 @@ Lemma box_fill E f P :
 Proof.
  iIntros (?) "H HP"; iDestruct "H" as (Φ) "[#HeqP Hf]".
  iExists Φ; iSplitR; first by rewrite big_opM_fmap.
-  rewrite internal_eq_iff later_iff big_opM_commute.
+  iEval (rewrite internal_eq_iff later_iff big_opM_commute) in "HeqP".
  iDestruct ("HeqP" with "HP") as "HP".
  iCombine "Hf" "HP" as "Hf".
  rewrite -big_opM_opM big_opM_fmap; iApply (fupd_big_sepM _ _ f).