Homebrew-core: brew doctor Throws "unexpected token" Error on macOS 10.14

[MichaelFoss]

Preface

• I am reporting a bug others will be able to reproduce and not asking a question
• I ran brew update and can still reproduce the problem
• I tried to run brew doctor, but an error was thrown
• I ran brew config and brew doctor and included their output
• I updated Xcode to 10.0 and re-installed Xcode Command Line Tools

Description

Prior to upgrading to macOS Mojave (10.14), brew update and brew upgrade were run. It stalled when upgrading ffmpeg and I had to kill -9 Homebrew to stop it (control+C did not work).

After finishing, I tried running brew doctor; however, it throws an error message (full message attached):

Error: 419: unexpected token at '"/usr/lib/libS/usr/local/Cellar/autoconf/2.69'

Upgrading to Mojave did not fix the issue.

Running brew gist-logs ffmpeg yields the following output:

Error: No logs.

Steps to Reproduce

1. Run brew doctor

Expected Results

The command should run to completion and list all problems and fixes.

Actual Results

The program errors out prior to completion.

Attachments

1. brew-config.txt
2. brew-doctor.txt

[fxcoudert]

Can you remove the file at ~/Library/Caches/Homebrew/linkage.db and try again, please?

[MichaelFoss]

```
$ cd ~/Library/Caches/Homebrew/
$ mv linkage.db linkage.db.bak
$ brew doctor
Your system is ready to brew.