log statements to investigate issue no. 47816

Obviously, this commit is not meant to be merged anywhere

Author: zackmdavis

src/Cargo.lock

@@ -2324,6 +2324,7 @@ dependencies = [
 name = "rustc_privacy"
 version = "0.0.0"
 dependencies = [
+ "log 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_typeck 0.0.0",

src/librustc_lint/builtin.rs

@@ -1405,6 +1405,7 @@ impl UnreachablePub {
     fn perform_lint(&self, cx: &LateContext, what: &str, id: ast::NodeId,
                     vis: &hir::Visibility, span: Span, exportable: bool) {
         let mut applicability = Applicability::MachineApplicable;
+        info!("ZMD debug access levels map is {:?}", cx.access_levels.map);
         match vis.node {
             hir::VisibilityKind::Public if !cx.access_levels.is_reachable(id) => {
                 if span.ctxt().outer().expn_info().is_some() {
@@ -1436,6 +1437,7 @@ impl UnreachablePub {
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnreachablePub {
     fn check_item(&mut self, cx: &LateContext, item: &hir::Item) {
+        info!("ZMD checking item {:?} with id {:?}", item.node, item.id);
         self.perform_lint(cx, "item", item.id, &item.vis, item.span, true);
     }
 

src/librustc_privacy/Cargo.toml

@@ -9,6 +9,7 @@ path = "lib.rs"
 crate-type = ["dylib"]
 
 [dependencies]
+log = "0.4"
 rustc = { path = "../librustc" }
 rustc_typeck = { path = "../librustc_typeck" }
 syntax = { path = "../libsyntax" }

src/librustc_privacy/lib.rs

@@ -16,6 +16,8 @@
 
 #![recursion_limit="256"]
 
+#[macro_use] extern crate log;
+
 #[macro_use] extern crate rustc;
 #[macro_use] extern crate syntax;
 extern crate rustc_typeck;
@@ -348,6 +350,7 @@ impl<'a, 'tcx> Visitor<'tcx> for EmbargoVisitor<'a, 'tcx> {
         if self.prev_level.is_some() {
             let def_id = self.tcx.hir.local_def_id(id);
             if let Some(exports) = self.tcx.module_exports(def_id) {
+                info!("ZMD exports in module {:?} are {:?}", m, exports);
                 for export in exports.iter() {
                     if let Some(node_id) = self.tcx.hir.as_local_node_id(export.def.def_id()) {
                         if export.vis == ty::Visibility::Public {