From a1c71a17090cd5ef732d852ee878114375ff9254 Mon Sep 17 00:00:00 2001
From: Joshua Nelson <jyn514@gmail.com>
Date: Sat, 8 Aug 2020 23:47:07 -0400
Subject: [PATCH] rustdoc,metadata: Debugging

---
 src/librustc_metadata/creader.rs                 | 11 ++++++++++-
 src/librustdoc/core.rs                           |  1 +
 src/librustdoc/passes/collect_intra_doc_links.rs |  1 +
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/librustc_metadata/creader.rs b/src/librustc_metadata/creader.rs
index f8446d83d2b9e..7562da6d78261 100644
--- a/src/librustc_metadata/creader.rs
+++ b/src/librustc_metadata/creader.rs
@@ -222,6 +222,7 @@ impl<'a> CrateLoader<'a> {
         let mut ret = None;
         self.cstore.iter_crate_data(|cnum, data| {
             if data.name() != name {
+                tracing::trace!("{} did not match {}", data.name(), name);
                 return;
             }
 
@@ -230,7 +231,10 @@ impl<'a> CrateLoader<'a> {
                     ret = Some(cnum);
                     return;
                 }
-                Some(..) => return,
+                Some(hash) => {
+                    debug!("actual hash {} did not match expected {}", hash, data.hash());
+                    return;
+                }
                 None => {}
             }
 
@@ -273,6 +277,11 @@ impl<'a> CrateLoader<'a> {
                 .1;
             if kind.matches(prev_kind) {
                 ret = Some(cnum);
+            } else {
+                debug!(
+                    "failed to load existing crate {}; kind {:?} did not match prev_kind {:?}",
+                    name, kind, prev_kind
+                );
             }
         });
         ret
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 89b217dc7d4f2..7c89b38a92c75 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -439,6 +439,7 @@ pub fn run_core(
                 resolver.borrow_mut().access(|resolver| {
                     sess.time("load_extern_crates", || {
                         for extern_name in &extern_names {
+                            debug!("loading extern crate {}", extern_name);
                             resolver
                                 .resolve_str_path_error(
                                     DUMMY_SP,
diff --git a/src/librustdoc/passes/collect_intra_doc_links.rs b/src/librustdoc/passes/collect_intra_doc_links.rs
index 0ef48e7d51bf2..fd5b8997d10f0 100644
--- a/src/librustdoc/passes/collect_intra_doc_links.rs
+++ b/src/librustdoc/passes/collect_intra_doc_links.rs
@@ -161,6 +161,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 return Some(res.map_id(|_| panic!("unexpected id")));
             }
             if let Some(module_id) = parent_id {
+                debug!("resolving {} as a macro in the module {:?}", path_str, module_id);
                 if let Ok((_, res)) =
                     resolver.resolve_str_path_error(DUMMY_SP, path_str, MacroNS, module_id)
                 {