From ffaefd72539af7d17690b947d38e58a103e2bd51 Mon Sep 17 00:00:00 2001
From: Philipp Stephani <phst@google.com>
Date: Tue, 28 Dec 2021 17:28:52 +0100
Subject: Avoid obsolete calling convention of ‘looking-back’.
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Calling ‘looking-back’ with only one argument causes a compile warning.
---
 rust-mode.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/rust-mode.el b/rust-mode.el
index 773251d..ebc2bbc 100644
--- a/rust-mode.el
+++ b/rust-mode.el
@@ -227,7 +227,8 @@ See `prettify-symbols-compose-predicate'."
        (pcase match
          ("||" (not (save-excursion
                       (goto-char start)
-                      (looking-back "\\(?:\\<move\\|[[({:=,;]\\) *"))))
+                      (looking-back "\\(?:\\<move\\|[[({:=,;]\\) *"
+                                    (line-beginning-position)))))
          ("&&" (char-equal (char-after end) ?\s))
          (_ t))))
 
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