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-rw-r--r--ext/stringio/stringio.c4
-rw-r--r--test/stringio/test_stringio.rb1
2 files changed, 3 insertions, 2 deletions
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index d6833976af..08524b4d9e 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -766,8 +766,8 @@ strio_ungetc(VALUE self, VALUE c)
check_modifiable(ptr);
if (NIL_P(c)) return Qnil;
- if (FIXNUM_P(c)) {
- int len, cc = FIX2INT(c);
+ if (RB_INTEGER_TYPE_P(c)) {
+ int len, cc = NUM2INT(c);
char buf[16];
enc = rb_enc_get(ptr->string);
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index 30370f5ca6..667fe3ea81 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -455,6 +455,7 @@ class TestStringIO < Test::Unit::TestCase
assert_equal("2", f.getc)
assert_raise(RangeError) {f.ungetc(0x1ffffff)}
+ assert_raise(RangeError) {f.ungetc(0xffffffffffffff)}
ensure
f.close unless f.closed?
end