string.c: raise at invalid byte sequence

* string.c (rb_str_count): raise at invalid byte sequence argument
  even if single-byte optimization is effective.
  [ruby-dev:48442] [Bug #10078]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46897 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 3 deletions

diff --git a/test/ruby/test_m17n_comb.rb b/test/ruby/test_m17n_comb.rb
index 12aa4d539d..b7efd030fe 100644
--- a/test/ruby/test_m17n_comb.rb
+++ b/test/ruby/test_m17n_comb.rb
@@ -88,7 +88,7 @@ class TestM17NComb < Test::Unit::TestCase
     r
   end
 
-  def assert_enccall(recv, meth, *args, &block)
+  def encdumpcall(recv, meth, *args, &block)
     desc = ''
     if String === recv
       desc << encdump(recv)
@@ -111,6 +111,11 @@ class TestM17NComb < Test::Unit::TestCase
     if block
       desc << ' {}'
     end
+    desc
+  end
+
+  def assert_enccall(recv, meth, *args, &block)
+    desc = encdumpcall(recv, meth, *args, &block)
     result = nil
     assert_nothing_raised(desc) {
       result = recv.send(meth, *args, &block)
@@ -710,12 +715,13 @@ class TestM17NComb < Test::Unit::TestCase
 
   def test_str_count
     combination(STRINGS, STRINGS) {|s1, s2|
+      desc = proc {encdumpcall(s1, :count, s2)}
       if !s1.valid_encoding? || !s2.valid_encoding?
-        assert_raise(ArgumentError, Encoding::CompatibilityError) { s1.count(s2) }
+        assert_raise(ArgumentError, Encoding::CompatibilityError, desc) { s1.count(s2) }
         next
       end
       if !s1.ascii_only? && !s2.ascii_only? && s1.encoding != s2.encoding
-        assert_raise(Encoding::CompatibilityError) { s1.count(s2) }
+        assert_raise(Encoding::CompatibilityError, desc) { s1.count(s2) }
         next
       end
       n = enccall(s1, :count, s2)