[ruby-core:89271] [Ruby trunk Bug#15199] scanf.rb broken with io from IO.pipe

Issue #15199 has been reported by MSP-Greg (Greg L).

----------------------------------------
Bug #15199: scanf.rb broken with io from IO.pipe
https://bugs.ruby-lang.org/issues/15199

* Author: MSP-Greg (Greg L)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
scanf.rb seems to be broken when using an io from a pipe.

The following code is used in IO#scanf:

link: https://github.com/ruby/ruby/blob/d4b0efc010a45e904ecdad2dd74374b5c74e61e3/lib/scanf.rb#L661-L664

```ruby
begin
  seek(start_position + matched_so_far, IO::SEEK_SET)
rescue Errno::ESPIPE
end
```

if the rescue statement is replaced with:
```
rescue Errno::ESPIPE, Errno::EINVAL
```

It seems to work.  I assume at some point, a 'pipe' io raised an Errno::ESPIPE error when called with #seek, but trunk & 2.3 respond with Errno::EINVAL...



-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:[e-mail]?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>