Fix breaking of solargraph rubocop diagnostics

[lekemula]

[ERROR][2025-09-05 14:24:44] ...p/_transport.lua:36 "rpc" "solargraph"
"stderr" "[WARN] [RSpec] Error processing
/Users/lekemula/Projects/solargraph/spec/diagnostics/rubocop_helpers_spec.rb:
undefined method type' for
nil\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker/rspec_context_namespace.rb:14:in
from_block_ast'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:199:in
block in
each_context_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:183:in
each_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:187:in
block in
each_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:187:in
each'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:187:in
each_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:187:in
block in
each_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:187:in
each'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:187:in
each_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:194:in
each_context_block'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/spec_walker.rb:100:in
walk!'\n/Users/lekemula/.rvm/gems/ruby-3.3.1/gems/solargraph-rspec-0.5.3/lib/solargraph/rspec/convention.rb:132:in
local'\n/Users/lekemula/Projects/solargraph/lib/solargraph/convention.rb:36:in
block in
for_local'\n/Users/lekemula/.rvm/rubies/ruby-3.3.1/lib/ruby/3.3.0/set.rb:501:in
each_key'\n/Users/lekemula/.rvm/rubies/ruby-3.3.1/lib/ruby/3.3.0/set.rb:501:in
each'\n/Users/lekemula/Projects/solargraph/lib/solargraph/convention.rb:35:in
for_local'\n/Users/lekemula/Projects/solargraph/lib/solargraph/source_map.rb:33:in
initialize'\n/Users/lekemula/Projects/solargraph/lib/solargraph/source_map.rb:157:in
new'\n/Users/lekemula/Projects/solargraph/lib/solargraph/source_map.rb:157:in
map'\n/Users/lekemula/Projects/solargraph/lib/solargraph/library.rb:475:in
next_map'\n/Users/lekemula/Projects/solargraph/lib/solargraph/language_server/host.rb:862:in
sync_library_map'\n/Users/lekemula/Projects/solargraph/lib/solargraph/language_server/host.rb:851:in
`block in library_map'\n"

[Copilot]

Pull Request Overview

This PR fixes a nil reference error in the Solargraph RSpec diagnostics by adding a null check before accessing the type method on the ast variable.

• Adds a guard clause to prevent nil dereference when processing RSpec context blocks
• Prevents the error "undefined method `type' for nil" that was breaking Solargraph diagnostics

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.60%. Comparing base (0e793bd) to head (5468044).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   86.59%   86.60%   +0.01%     
==========================================
  Files          23       23              
  Lines        1104     1105       +1     
  Branches       76       77       +1     
==========================================
+ Hits          956      957       +1     
  Misses        148      148              

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