Derive debug from `BuildTargetConfigValue`

diff --git a/src/cargo/util/config/mod.rs b/src/cargo/util/config/mod.rs
index afabcc3ea1c01ed6b0ea8277bfc1039088cc4ce1..764cd7be91f08d426e6ff2549e7744931fbbfdf5 100644 (file)
--- a/src/cargo/util/config/mod.rs
+++ b/src/cargo/util/config/mod.rs
@@ -2222,6 +2222,7 @@ impl BuildTargetConfig {
 }
 
 /// Represents a value of `build.target`.
+#[derive(Debug)]
 pub enum BuildTargetConfigValue<'a> {
     /// Path to a target specification file (in JSON).
     /// <https://doc.rust-lang.org/rustc/targets/custom.html>