diff options
| -rw-r--r-- | mrblib/io.rb | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mrblib/io.rb b/mrblib/io.rb index 249488ac4..cd8c801d2 100644 --- a/mrblib/io.rb +++ b/mrblib/io.rb @@ -91,6 +91,7 @@ class IO def flush # mruby-io always writes immediately (no output buffer). + raise IOError, "closed stream" if self.closed? self end |