From e0deadf2f665e6589ac5f1938a15abbd77a06d78 Mon Sep 17 00:00:00 2001
From: Vince Broz <vince@broz.cc>
Date: Sun, 11 Jan 2026 17:14:56 -0500
Subject: [PATCH 1/3] Use correct field for self type resolution

Add a regression test and fix for self type resolution issue found on
a future branch
---
 lib/solargraph/source/chain.rb         |  2 +-
 spec/type_checker/levels/alpha_spec.rb | 29 ++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 spec/type_checker/levels/alpha_spec.rb

diff --git a/lib/solargraph/source/chain.rb b/lib/solargraph/source/chain.rb
index f7a03b552..7aa8dede1 100644
--- a/lib/solargraph/source/chain.rb
+++ b/lib/solargraph/source/chain.rb
@@ -276,7 +276,7 @@ def infer_from_definitions pins, context, api_map, locals
           return type
         end
 
-        type.self_to_type(context.return_type)
+        type.self_to_type(context.context)
       end
 
       # @param type [ComplexType]
diff --git a/spec/type_checker/levels/alpha_spec.rb b/spec/type_checker/levels/alpha_spec.rb
new file mode 100644
index 000000000..118f4cccf
--- /dev/null
+++ b/spec/type_checker/levels/alpha_spec.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+describe Solargraph::TypeChecker do
+  context 'when at alpha level' do
+    def type_checker code
+      Solargraph::TypeChecker.load_string(code, 'test.rb', :alpha)
+    end
+
+    it 'resolves self correctly in arguments' do
+      checker = type_checker(%(
+        class Foo
+          # @param other [self]
+          #
+          # @return [String]
+          def bar other
+            other.bing
+          end
+
+          # @return [String]
+          def bing
+            'bing'
+          end
+        end
+      ))
+
+      expect(checker.problems.map(&:message)).to eq([])
+    end
+  end
+end

From 176b50649e01ccbeb0013bc439093515f3d30760 Mon Sep 17 00:00:00 2001
From: Vince Broz <vince@broz.cc>
Date: Sun, 11 Jan 2026 18:05:51 -0500
Subject: [PATCH 2/3] Fix another location with another test case

---
 lib/solargraph/source/chain.rb         |  2 +-
 spec/type_checker/levels/alpha_spec.rb | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/lib/solargraph/source/chain.rb b/lib/solargraph/source/chain.rb
index 7aa8dede1..e9722fcc4 100644
--- a/lib/solargraph/source/chain.rb
+++ b/lib/solargraph/source/chain.rb
@@ -271,7 +271,7 @@ def infer_from_definitions pins, context, api_map, locals
                else
                  ComplexType.new(types)
                end
-        if context.nil? || context.return_type.undefined?
+        if context.nil? || context.context.undefined?
           # up to downstream to resolve self type
           return type
         end
diff --git a/spec/type_checker/levels/alpha_spec.rb b/spec/type_checker/levels/alpha_spec.rb
index 118f4cccf..4fd591fda 100644
--- a/spec/type_checker/levels/alpha_spec.rb
+++ b/spec/type_checker/levels/alpha_spec.rb
@@ -25,5 +25,26 @@ def bing
 
       expect(checker.problems.map(&:message)).to eq([])
     end
+
+    it 'resolves self correctly in arguments (second case)' do
+      checker = type_checker(%(
+        class Blah
+          # @return [String]
+          attr_reader :filename
+
+          # @param filename [String]
+          def initialize filename
+            @filename = filename
+          end
+
+          # @param location [self]
+          def contain? location
+            filename == location.filename
+          end
+        end
+      ))
+
+      expect(checker.problems.map(&:message)).to eq([])
+    end
   end
 end

From 45ea8955b5c0c3c95332489cbb93f5529690d9f0 Mon Sep 17 00:00:00 2001
From: Vince Broz <vince@broz.cc>
Date: Sun, 11 Jan 2026 18:19:34 -0500
Subject: [PATCH 3/3] Drop now-unneeded @sg-ignore

---
 lib/solargraph/pin/method.rb | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/solargraph/pin/method.rb b/lib/solargraph/pin/method.rb
index 86bf1cd09..e6e0f6503 100644
--- a/lib/solargraph/pin/method.rb
+++ b/lib/solargraph/pin/method.rb
@@ -92,7 +92,6 @@ def combine_with(other, attrs = {})
         end
         new_attrs = {
           visibility: combine_visibility(other),
-          # @sg-ignore https://github.com/castwide/solargraph/pull/1050
           explicit: explicit? || other.explicit?,
           block: combine_blocks(other),
           node: choose_node(other, :node),