The gem jekyll-multiple-languages-plugin caused an issue when running jekyll doctor because site.config['lang'] wasn't defined yet in my case and therefore caused an exception.
Therefore I simply added a check whether site.config['lang'] is defined before and this way everything works as expected.
I hope it helps others, too.
Error Stacktrace (click to expand)
```
~/some_site ❯❯❯ bundle exec jekyll doctor
Configuration file: /home/user/some_site/_config.yml
Configuration file: /home/user/some_site/_config.yml
jekyll 3.8.7 | Error: no implicit conversion of nil into String
Traceback (most recent call last):
44: from /home/user/.rbenv/versions/2.7.1/bin/bundle:23:in `'
43: from /home/user/.rbenv/versions/2.7.1/bin/bundle:23:in `load'
42: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/exe/bundle:34:in `'
41: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/friendly_errors.rb:123:in `with_friendly_errors'
40: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/exe/bundle:46:in `block in '
39: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli.rb:24:in `start'
38: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/base.rb:476:in `start'
37: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli.rb:30:in `dispatch'
36: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor.rb:399:in `dispatch'
35: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
34: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
33: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli.rb:476:in `exec'
32: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:28:in `run'
31: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `kernel_load'
30: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `load'
29: from /home/user/.rbenv/versions/2.7.1/bin/jekyll:23:in `'
28: from /home/user/.rbenv/versions/2.7.1/bin/jekyll:23:in `load'
27: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/exe/jekyll:15:in `'
26: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mercenary-0.3.6/lib/mercenary.rb:19:in `program'
25: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mercenary-0.3.6/lib/mercenary/program.rb:42:in `go'
24: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `execute'
23: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `each'
22: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `block in execute'
21: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/commands/doctor.rb:17:in `block (2 levels) in init_with_program'
20: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/commands/doctor.rb:26:in `process'
19: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/site.rb:173:in `generate'
18: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/site.rb:173:in `each'
17: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/site.rb:175:in `block in generate'
16: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-redirect-from-0.15.0/lib/jekyll-redirect-from/generator.rb:18:in `generate'
15: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-redirect-from-0.15.0/lib/jekyll-redirect-from/generator.rb:18:in `each'
14: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-redirect-from-0.15.0/lib/jekyll-redirect-from/generator.rb:21:in `block in generate'
13: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-redirect-from-0.15.0/lib/jekyll-redirect-from/generator.rb:32:in `generate_redirect_from'
12: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-redirect-from-0.15.0/lib/jekyll-redirect-from/redirectable.rb:20:in `redirect_from'
11: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/convertible.rb:115:in `to_liquid'
10: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/convertible.rb:115:in `map'
9: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/convertible.rb:116:in `block in to_liquid'
8: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/page.rb:67:in `dir'
7: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/page.rb:101:in `url'
6: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/page.rb:87:in `template'
5: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/page.rb:171:in `html?'
4: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/convertible.rb:89:in `output_ext'
3: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/renderer.rb:45:in `output_ext'
2: from /home/user/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/jekyll-3.8.7/lib/jekyll/renderer.rb:250:in `permalink_ext'
1: from /path/to/gems/jekyll-multiple-languages-plugin/lib/jekyll-multiple-languages-plugin.rb:248:in `permalink'
/path/to/gems/jekyll-multiple-languages-plugin/lib/jekyll-multiple-languages-plugin.rb:248:in `+': no implicit conversion of nil into String (TypeError)
```
PS: Thank you for the jekyll-multiple-languages-plugin! It's great!
The gem
jekyll-multiple-languages-plugincaused an issue when runningjekyll doctorbecausesite.config['lang']wasn't defined yet in my case and therefore caused an exception. Therefore I simply added a check whethersite.config['lang']is defined before and this way everything works as expected.I hope it helps others, too.
Error Stacktrace (click to expand)
``` ~/some_site ❯❯❯ bundle exec jekyll doctor Configuration file: /home/user/some_site/_config.yml Configuration file: /home/user/some_site/_config.yml jekyll 3.8.7 | Error: no implicit conversion of nil into String Traceback (most recent call last): 44: from /home/user/.rbenv/versions/2.7.1/bin/bundle:23:in `PS: Thank you for the
jekyll-multiple-languages-plugin! It's great!