update

Author: tgross35

library/compiler-builtins/crates/josh-sync/src/sync.rs

@@ -66,6 +66,9 @@ impl GitSync {
         assert_ne!(previous_upstream_base, new_upstream_base, "nothing to pull");
 
         let orig_head = self.read(["git", "rev-parse", "HEAD"]);
+        println!("original upstream base: {previous_upstream_base}");
+        println!("new upstream base: {new_upstream_base}");
+        println!("original HEAD: {orig_head}");
 
         // Fetch the latest upstream HEAD so we can get a summary. Use the Josh URL for caching.
         self.run([
@@ -103,6 +106,7 @@ impl GitSync {
         // Fetch given rustc commit.
         self.run(["git", "fetch", &josh_url_filtered]);
         let incoming_ref = self.read(["git", "rev-parse", "FETCH_HEAD"]);
+        println!("incoming ref: {incoming_ref}");
 
         let merge_message = format!(
             "Merge ref {upstream_head_short}{filter} from {upstream_url}\n\n\
@@ -124,6 +128,7 @@ impl GitSync {
         let num_roots_before = num_roots();
 
         let pre_merge_sha = self.read(["git", "rev-parse", "HEAD"]);
+        println!("pre-merge HEAD: {pre_merge_sha}");
 
         // Merge the fetched commit.
         self.run([