From 096cdd3f051748923899afb561814135c6b0281a Mon Sep 17 00:00:00 2001
From: Martin Liska <martin.liska@hey.com>
Date: Fri, 27 Mar 2026 11:07:17 +0100
Subject: [PATCH] fix(WASIX): use advance_unchecked for TcpStream read_buf
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The recv already write into the buffer without first updating the cursor’s initialized-byte bookkeeping.
Thus advance_unchecked must be used, otherwise we'll hit:
```
assertion failed: n <= self.buf.init - self.buf.filled
```
---
 library/std/src/sys/net/connection/wasix.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/std/src/sys/net/connection/wasix.rs b/library/std/src/sys/net/connection/wasix.rs
index b60b79f25b9f0..fe49c8d0b72e8 100644
--- a/library/std/src/sys/net/connection/wasix.rs
+++ b/library/std/src/sys/net/connection/wasix.rs
@@ -298,7 +298,7 @@ impl Socket {
             );
             match self.recv(slice) {
                 Ok(n) => {
-                    buf.advance(n);
+                    buf.advance_unchecked(n);
                     Ok(())
                 }
                 Err(e) => Err(e),