From fe6ac6a58174c3d8900a8884d3dcbd16fd8be3bf Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Wed, 4 Aug 2021 10:24:17 +1000
Subject: [PATCH] AP_Button: fixed formatting of pin arming check

---
 libraries/AP_Button/AP_Button.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/AP_Button/AP_Button.cpp b/libraries/AP_Button/AP_Button.cpp
index a49d7fcaa19..b6fd87483d5 100644
--- a/libraries/AP_Button/AP_Button.cpp
+++ b/libraries/AP_Button/AP_Button.cpp
@@ -376,7 +376,7 @@ bool AP_Button::arming_checks(size_t buflen, char *buffer) const
     }
     for (uint8_t i=0; i<AP_BUTTON_NUM_PINS; i++) {
         if (pin[i] != -1 && !hal.gpio->valid_pin(pin[i])) {
-            hal.util->snprintf(buffer, buflen, "BTN_PIN%u invalid", i + 1, pin[i]);
+            hal.util->snprintf(buffer, buflen, "BTN_PIN%u %d invalid", unsigned(i + 1), int(pin[i].get()));
             return false;
         }
     }