Fixed #3548: Compiler crashes when calling class method of an alias

crystal-lang · Nov 15, 2016 · c534cb4 · c534cb4
1 parent 7e37c22
commit c534cb4
Showing 2 changed files with 30 additions and 1 deletion.
diff --git a/spec/compiler/semantic/alias_spec.cr b/spec/compiler/semantic/alias_spec.cr
@@ -248,4 +248,20 @@ describe "Semantic: alias" do
       Alias
       )) { static_array_of(uint8, 10).metaclass }
   end
+
+  it "looks up alias for macro resolution (#3548)" do
+    assert_type(%(
+      class Foo
+        class Bar
+          def self.baz
+            1
+          end
+        end
+      end
+
+      alias Baz = Foo
+
+      Baz::Bar.baz
+      )) { int32 }
+  end
 end
diff --git a/src/compiler/crystal/types.cr b/src/compiler/crystal/types.cr
@@ -2232,7 +2232,20 @@ module Crystal
     end
 
     delegate lookup_defs, lookup_defs_with_modules, lookup_first_def,
-      lookup_macro, lookup_macros, types, types?, to: aliased_type
+      lookup_macro, lookup_macros, to: aliased_type
+
+    def types?
+      process_value
+      if aliased_type = @aliased_type
+        aliased_type.types?
+      else
+        nil
+      end
+    end
+
+    def types
+      types?.not_nil!
+    end
 
     def remove_alias
       process_value