From 8cbd6aa4b5a8e7eafba7f977063241f88f78b8ce Mon Sep 17 00:00:00 2001
From: Brandon Bickford <brandon@tiptop.xyz>
Date: Fri, 17 Jan 2025 08:26:54 -0800
Subject: [PATCH] Require foreign type specs to have leading colons

---
 prost-derive/src/field/scalar.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/prost-derive/src/field/scalar.rs b/prost-derive/src/field/scalar.rs
index 908f3ec6a..89c419a82 100644
--- a/prost-derive/src/field/scalar.rs
+++ b/prost-derive/src/field/scalar.rs
@@ -453,7 +453,7 @@ impl Ty {
             Meta::Path(ref name) if name.is_ident("bool") => Ty::Bool,
             Meta::Path(ref name) if name.is_ident("string") => Ty::String,
             Meta::Path(ref name) if name.is_ident("bytes") => Ty::Bytes(BytesTy::Vec),
-            Meta::Path(ref name) => Ty::Foreign(name.clone()),
+            Meta::Path(ref name) if name.leading_colon.is_some() => Ty::Foreign(name.clone()),
             Meta::NameValue(MetaNameValue {
                 ref path,
                 value: