From cc83ec9ac1cf1ad60748fd3bb5114a6e6e471d92 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs=20Legan=C3=A9s-Combarro=20=27piranna?=
 <piranna@gmail.com>
Date: Thu, 4 Jul 2019 07:02:47 +0200
Subject: [PATCH] [___syscall5] debug messages

---
 lib/emscripten/src/syscalls/unix.rs | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/emscripten/src/syscalls/unix.rs b/lib/emscripten/src/syscalls/unix.rs
index 961e4227a..392919e8c 100644
--- a/lib/emscripten/src/syscalls/unix.rs
+++ b/lib/emscripten/src/syscalls/unix.rs
@@ -120,13 +120,12 @@ pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
     let _path_str = unsafe { std::ffi::CStr::from_ptr(real_path).to_str().unwrap() };
     let fd = unsafe { open(real_path, flags, mode) };
     debug!(
-        "=> path: {}, flags: {}, mode: {} = fd: {}, last os error: {}",
-        _path_str,
-        flags,
-        mode,
-        fd,
-        Error::last_os_error(),
+        "=> path: {}, flags: {}, mode: {} = fd: {}",
+        _path_str, flags, mode, fd,
     );
+    if fd == -1 {
+        debug!("=> last os error: {}", Error::last_os_error(),);
+    }
     fd
 }