From 425a4b7a746f23ce0d23ed7d7a95d1ea67ed8f63 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Wed, 19 Jul 2023 16:00:37 -0700
Subject: [PATCH] Check precompiled subprocess exit status

---
 precompiled/serde_derive/src/lib_precompiled.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/precompiled/serde_derive/src/lib_precompiled.rs b/precompiled/serde_derive/src/lib_precompiled.rs
index 0821f334..92fe4408 100644
--- a/precompiled/serde_derive/src/lib_precompiled.rs
+++ b/precompiled/serde_derive/src/lib_precompiled.rs
@@ -48,6 +48,14 @@ fn derive(select: u8, input: TokenStream) -> TokenStream {
     buf.clear();
     stdout.read_to_end(&mut buf).unwrap();
 
+    let success = match child.wait() {
+        Ok(exit_status) => exit_status.success(),
+        Err(_) => !buf.is_empty(),
+    };
+    if !success {
+        panic!();
+    }
+
     let mut buf = InputBuffer::new(&buf);
     memory.receive(&mut buf)
 }