Merge pull request #1463 from ruby/fix-fiber-storage-types

String keys are forbidden.

Author: soutaro

core/fiber.rbs

@@ -86,7 +86,7 @@ class Fiber < Object
   #
   # See also Fiber::[]=.
   #
-  def self.[]: (Symbol | String) -> untyped
+  def self.[]: (Symbol) -> untyped
 
   # <!--
   #   rdoc-file=cont.c
@@ -99,7 +99,7 @@ class Fiber < Object
   #
   # See also Fiber::[].
   #
-  def self.[]=: [A] (Symbol | String, A) -> A
+  def self.[]=: [A] (Symbol, A) -> A
 
   # <!--
   #   rdoc-file=cont.c

test/stdlib/Fiber_test.rb

@@ -15,18 +15,6 @@ def test_aref
       "(Symbol) -> Integer",
       Fiber, :[], :key
     )
-
-    key = "string"
-
-    assert_send_type(
-      "(String, Integer) -> Integer",
-      Fiber, :[]=, key, 123
-    )
-
-    assert_send_type(
-      "(String) -> Integer",
-      Fiber, :[], key
-    )
   end
 
   def test_blocking?