4 files changed, 49 insertions, 20 deletions

diff --git a/range.c b/range.c
index 6d90ecf4f3..0176e82ca3 100644
--- a/range.c
+++ b/range.c
@@ -1768,6 +1768,39 @@ range_include(VALUE range, VALUE val)
     return rb_call_super(1, &val);
 }
 
+static inline bool
+range_integer_edge_p(VALUE beg, VALUE end)
+{
+    return (!NIL_P(rb_check_to_integer(beg, "to_int")) ||
+            !NIL_P(rb_check_to_integer(end, "to_int")));
+}
+
+static inline bool
+range_string_edge_p(VALUE beg, VALUE end)
+{
+    return RB_TYPE_P(beg, T_STRING) || RB_TYPE_P(end, T_STRING);
+}
+
+static inline bool
+range_string_range_p(VALUE beg, VALUE end)
+{
+    return RB_TYPE_P(beg, T_STRING) && RB_TYPE_P(end, T_STRING);
+}
+
+static inline VALUE
+range_include_fallback(VALUE beg, VALUE end, VALUE val)
+{
+    if (NIL_P(beg) && NIL_P(end)) {
+        if (linear_object_p(val)) return Qtrue;
+    }
+
+    if (NIL_P(beg) || NIL_P(end)) {
+        rb_raise(rb_eTypeError, "cannot determine inclusion in beginless/endless ranges");
+    }
+
+    return Qundef;
+}
+
 static VALUE
 range_string_cover_internal(VALUE range, VALUE val)
 {
@@ -1776,13 +1809,11 @@ range_string_cover_internal(VALUE range, VALUE val)
     int nv = FIXNUM_P(beg) || FIXNUM_P(end) ||
              linear_object_p(beg) || linear_object_p(end);
 
-    if (nv ||
-        !NIL_P(rb_check_to_integer(beg, "to_int")) ||
-        !NIL_P(rb_check_to_integer(end, "to_int"))) {
+    if (nv || range_integer_edge_p(beg, end)) {
         return r_cover_p(range, beg, end, val);
     }
-    else if (RB_TYPE_P(beg, T_STRING) || RB_TYPE_P(end, T_STRING)) {
-        if (RB_TYPE_P(beg, T_STRING) && RB_TYPE_P(end, T_STRING)) {
+    else if (range_string_edge_p(beg, end)) {
+        if (range_string_range_p(beg, end)) {
             return r_cover_p(range, beg, end, val);
         }
         if (NIL_P(beg)) {
@@ -1800,11 +1831,7 @@ range_string_cover_internal(VALUE range, VALUE val)
         }
     }
 
-    if (NIL_P(beg) || NIL_P(end)) {
-        rb_raise(rb_eTypeError, "cannot determine inclusion in beginless/endless ranges");
-    }
-
-    return Qundef;
+    return range_include_fallback(beg, end, val);
 }
 
 static VALUE
@@ -1815,20 +1842,14 @@ range_include_internal(VALUE range, VALUE val)
     int nv = FIXNUM_P(beg) || FIXNUM_P(end) ||
              linear_object_p(beg) || linear_object_p(end);
 
-    if (nv ||
-        !NIL_P(rb_check_to_integer(beg, "to_int")) ||
-        !NIL_P(rb_check_to_integer(end, "to_int"))) {
+    if (nv || range_integer_edge_p(beg, end)) {
         return r_cover_p(range, beg, end, val);
     }
-    else if (RB_TYPE_P(beg, T_STRING) && RB_TYPE_P(end, T_STRING)) {
+    else if (range_string_range_p(beg, end)) {
         return rb_str_include_range_p(beg, end, val, RANGE_EXCL(range));
     }
 
-    if (NIL_P(beg) || NIL_P(end)) {
-        rb_raise(rb_eTypeError, "cannot determine inclusion in beginless/endless ranges");
-    }
-
-    return Qundef;
+    return range_include_fallback(beg, end, val);
 }
 
 static int r_cover_range_p(VALUE range, VALUE beg, VALUE end, VALUE val);
diff --git a/spec/ruby/core/range/case_compare_spec.rb b/spec/ruby/core/range/case_compare_spec.rb
index 4a3faa3163..65878aaabe 100644
--- a/spec/ruby/core/range/case_compare_spec.rb
+++ b/spec/ruby/core/range/case_compare_spec.rb
@@ -10,4 +10,10 @@ describe "Range#===" do
 
   it_behaves_like :range_cover_and_include, :===
   it_behaves_like :range_cover, :===
+
+  ruby_bug "#19533", "3.2"..."3.3" do
+    it "returns true on any value if begin and end are both nil" do
+      (nil..nil).should === 1
+    end
+  end
 end
diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index bb5ef6df8f..54365f1277 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -539,6 +539,8 @@ class TestRange < Test::Unit::TestCase
     assert_not_operator(0..10, :===, 11)
     assert_operator(5..nil, :===, 11)
     assert_not_operator(5..nil, :===, 0)
+    assert_operator(nil..10, :===, 0)
+    assert_operator(nil..nil, :===, 0)
   end
 
   def test_eqq_string
diff --git a/version.h b/version.h
index d250f33336..9b392f9c64 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 2
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 87
+#define RUBY_PATCHLEVEL 88
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"