From 3517e6d752634fda2c047c721ccce3625e54b636 Mon Sep 17 00:00:00 2001
From: topjohnwu <topjohnwu@gmail.com>
Date: Fri, 20 Jan 2023 03:45:16 +0800
Subject: [PATCH] Handle nullptr char* in Rust

---
 native/src/base/misc.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/native/src/base/misc.rs b/native/src/base/misc.rs
index e809339ff..521acb651 100644
--- a/native/src/base/misc.rs
+++ b/native/src/base/misc.rs
@@ -108,7 +108,11 @@ macro_rules! cstr {
 }
 
 pub fn ptr_to_str<'a, T>(ptr: *const T) -> &'a str {
-    unsafe { CStr::from_ptr(ptr.cast()) }.to_str().unwrap_or("")
+    if ptr.is_null() {
+        "(null)"
+    } else {
+        unsafe { CStr::from_ptr(ptr.cast()) }.to_str().unwrap_or("")
+    }
 }
 
 pub fn errno() -> &'static mut i32 {