From da86c81e39ff27925e7052e1cc612414c7eeb244 Mon Sep 17 00:00:00 2001
From: Samrat Man Singh <samratmansingh@gmail.com>
Date: Mon, 27 Apr 2020 09:35:19 +0530
Subject: [PATCH] Add test to verify arg size mismatch throws UB

Also: bump up `rust-version`
---
 rust-version                        |  2 +-
 tests/compile-fail/shim_arg_size.rs | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 tests/compile-fail/shim_arg_size.rs

diff --git a/rust-version b/rust-version
index 8ed0e6ba353..53979b82cf8 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-14b15521c52549ebbb113173b4abecd124b5a823
+e83f7563495dbe2629b0cbc738afb0808c4482e1
diff --git a/tests/compile-fail/shim_arg_size.rs b/tests/compile-fail/shim_arg_size.rs
new file mode 100644
index 00000000000..38b5475b9f7
--- /dev/null
+++ b/tests/compile-fail/shim_arg_size.rs
@@ -0,0 +1,15 @@
+#![feature(rustc_private)]
+
+extern crate libc;
+
+// error-pattern: scalar size mismatch
+fn main() {
+    extern "C" {
+        fn malloc(size: u32) -> *mut std::ffi::c_void;
+    }
+
+    unsafe {
+        let p1 = malloc(42);
+        libc::free(p1);
+    };
+}