print vis & defaultness for nested items

[Centril]

Fixes #69315 which was injected by #69194.

r? @petrochenkov
cc @alexcrichton

[petrochenkov]

r=me with the unused import removed.

[Centril]

@bors r=petrochenkov

[bors]

📌 Commit 14442e0 has been approved by petrochenkov

[rust-highfive]

Your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2020-02-21T17:31:43.4641094Z ========================== Starting Command Output ===========================
2020-02-21T17:31:43.4645260Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/5ce49279-6ad8-4ed9-b312-81e6985caf36.sh
2020-02-21T17:31:43.4645705Z 
2020-02-21T17:31:43.4649725Z ##[section]Finishing: Disable git automatic line ending conversion
2020-02-21T17:31:43.4670589Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/69334/merge to s
2020-02-21T17:31:43.4673981Z Task         : Get sources
2020-02-21T17:31:43.4674535Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-02-21T17:31:43.4674876Z Version      : 1.0.0
2020-02-21T17:31:43.4675089Z Author       : Microsoft
---
2020-02-21T17:31:44.4619701Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-02-21T17:31:44.4625275Z ##[command]git config gc.auto 0
2020-02-21T17:31:44.4628994Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-02-21T17:31:44.4632466Z ##[command]git config --get-all http.proxy
2020-02-21T17:31:44.4639717Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/69334/merge:refs/remotes/pull/69334/merge
---
2020-02-21T17:33:22.3338664Z tar: Exiting with failure status due to previous errors
2020-02-21T17:33:22.3368144Z 
2020-02-21T17:33:22.3464731Z ##[error]Bash exited with code '2'.
2020-02-21T17:33:22.3480325Z ##[section]Finishing: Install awscli
2020-02-21T17:33:22.3554919Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/69334/merge to s
2020-02-21T17:33:22.3562101Z Task         : Get sources
2020-02-21T17:33:22.3562952Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-02-21T17:33:22.3563311Z Version      : 1.0.0
2020-02-21T17:33:22.3563550Z Author       : Microsoft
2020-02-21T17:33:22.3563550Z Author       : Microsoft
2020-02-21T17:33:22.3563938Z Help         : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2020-02-21T17:33:22.3564366Z ==============================================================================
2020-02-21T17:33:22.6836966Z Cleaning any cached credential from repository: rust-lang/rust (GitHub)
2020-02-21T17:33:22.6893325Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/69334/merge to s
2020-02-21T17:33:22.6983208Z Cleaning up task key
2020-02-21T17:33:22.6984505Z Start cleaning up orphan processes.
2020-02-21T17:33:22.7253289Z Terminate orphan process: pid (3831) (python)
2020-02-21T17:33:22.7290084Z ##[section]Finishing: Finalize Job

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[Centril]

Failure is a spurious network issue.

[bors]

⌛ Testing commit 14442e0 with merge a82d3cf...

[bors]

💔 Test failed - checks-azure

[Centril]

Failure looks spurious, @bors retry

[bors]

⌛ Testing commit 14442e0 with merge 1484196...

[bors]

☀️ Test successful - checks-azure
Approved by: petrochenkov
Pushing 1484196 to master...