Warn EOF char in comment

2 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 2622ec529c..17a0c8a077 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -720,6 +720,15 @@ x = __ENCODING__
     assert_syntax_error("=begin", error)
   end
 
+  def test_embedded_rd_warning
+    [["\0", "\\0"], ["\C-d", "^D"], ["\C-z", "^Z"]].each do |eof, mesg|
+      mesg = /encountered #{Regexp.quote(mesg)}/
+      assert_warning(mesg) {eval("=begin\n#{eof}\n=end")}
+      assert_warning(mesg) {eval("=begin#{eof}\n=end")}
+      assert_warning(mesg) {eval("=begin\n=end#{eof}\n")}
+    end
+  end
+
   def test_float
     assert_equal(1.0/0, eval("1e10000"))
     assert_syntax_error('1_E', /trailing `_'/)
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 5fb4dfa64f..d0748e7028 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -943,6 +943,12 @@ eom
     end
   end
 
+  def test_warning_for_eof_in_comment
+    assert_warning(/encountered \\0/) {eval("#\0")}
+    assert_warning(/encountered \^D/) {eval("#\C-d")}
+    assert_warning(/encountered \^Z/) {eval("#\C-z")}
+  end
+
   def test_unexpected_fraction
     msg = /unexpected fraction/
     assert_syntax_error("0x0.0", msg)