1 files changed, 3 insertions, 0 deletions
diff --git a/src/rt/rust.cpp b/src/rt/rust.cpp
index b8a3cde5a93..0049537bd33 100644
--- a/src/rt/rust.cpp
+++ b/src/rt/rust.cpp
@@ -1,4 +1,5 @@
 #include "rust_internal.h"
+#include <cstdio>
 
 struct
 command_line_args : public kernel_owned<command_line_args>
@@ -75,6 +76,8 @@ int check_claims = 0;
 
 extern "C" CDECL int
 rust_start(uintptr_t main_fn, int argc, char **argv, void* crate_map) {
+    fprintf(stderr, "rust_start, argc=%d argv=%p\n", argc, argv);
+
     rust_env *env = load_env();
 
     update_log_settings(crate_map, env->logspec);