From ab620f40844a837546497252849933ef2f685f4d Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Fri, 18 Jul 2025 06:06:42 -0500
Subject: [PATCH] py/mpprint: Fix printing pointers with upper bit set.

On a build like nanbox, `mp_uint_t` is wider than `u/intptr_t`.  Using a
signed type for fetching pointer values resulted in erroneous results: like
`<function f at 0xfffffffff7a60bc0>` instead of
`<function f at 0xf7a60bc0>`.

Signed-off-by: Jeff Epler <jepler@gmail.com>
---
 py/mpprint.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/py/mpprint.c b/py/mpprint.c
index e56b949ddd..f1d8bd0c57 100644
--- a/py/mpprint.c
+++ b/py/mpprint.c
@@ -530,7 +530,7 @@ int mp_vprintf(const mp_print_t *print, const char *fmt, va_list args) {
                 char fmt_chr = *fmt;
                 mp_uint_t val;
                 if (fmt_chr == 'p' || fmt_chr == 'P') {
-                    val = va_arg(args, intptr_t);
+                    val = va_arg(args, uintptr_t);
                 }
                 #if SUPPORT_LL_FORMAT
                 else if (long_long_arg) {