show build diagnostics even if build fails

Author: antonok-edm

src/lib.rs

@@ -428,9 +428,6 @@ fn cargo_build(matches: &ArgMatches, metadata: &Metadata) -> Result<Option<Artif
     let messages = Message::parse_stream(stdout).collect::<Vec<_>>();
 
     let status = child.wait()?;
-    if !status.success() {
-        bail!("Failed to parse crate metadata");
-    }
 
     let mut target_artifact: Option<Artifact> = None;
     for message in messages {
@@ -457,6 +454,10 @@ fn cargo_build(matches: &ArgMatches, metadata: &Metadata) -> Result<Option<Artif
         }
     }
 
+    if !status.success() {
+        bail!("Failed to parse crate metadata");
+    }
+
     if target_artifact.is_none() {
         bail!("Could not determine the wanted artifact");
     }