[ruby-core:64408] [ruby-trunk - Bug #10111] gdbm truncated UTF-8 data problem

Issue #10111 has been updated by Akira Tanaka.


The data is not truncated but has a different encoding (as nobu pointed at first).

```
% cat t.gdbm.rb
# coding: utf-8
require 'gdbm'

data = "\xEA\xB0\x80ABCDEF"
db = GDBM.new( 'test.db', 0666 )
db['key'] = data

p [db['key'].b, db['key'].encoding]
p [data.b, data.encoding]
throw 'data truncated!!' if db['key'] != data
% ./ruby -v t.gdbm.rb
ruby 2.2.0dev (2014-08-15 trunk 47187) [x86_64-linux]
["\xEA\xB0\x80ABCDEF", #<Encoding:ASCII-8BIT>]
["\xEA\xB0\x80ABCDEF", #<Encoding:UTF-8>]
t.gdbm.rb:10:in `throw': uncaught throw "data truncated!!" (ArgumentError)
	from t.gdbm.rb:10:in `<main>'
```

dbm behaves same as gdbm.

```
% cat t.dbm.rb 
# coding: utf-8
require 'dbm'

data = "\xEA\xB0\x80ABCDEF"
db = DBM.new( 'test.db', 0666 )
db['key'] = data

p [db['key'].b, db['key'].encoding]
p [data.b, data.encoding]
throw 'data truncated!!' if db['key'] != data
% ./ruby -v t.dbm.rb 
ruby 2.2.0dev (2014-08-15 trunk 47187) [x86_64-linux]
["\xEA\xB0\x80ABCDEF", #<Encoding:ASCII-8BIT>]
["\xEA\xB0\x80ABCDEF", #<Encoding:UTF-8>]
t.dbm.rb:10:in `throw': uncaught throw "data truncated!!" (ArgumentError)
	from t.dbm.rb:10:in `<main>'
```


----------------------------------------
Bug #10111: gdbm truncated UTF-8 data problem
https://bugs.ruby-lang.org/issues/10111#change-48365

* Author: KiHyun Kang
* Status: Open
* Priority: Normal
* Assignee: Aaron Patterson
* Category: ext
* Target version: 
* ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
Reproducible script is here.

~~~
# coding: utf-8
require 'gdbm'

data = "\xEA\xB0\x80ABCDEF"
db = GDBM.new( 'test.db', 0666 )
db['key'] = data

throw 'data truncated!!' if db['key'] != data
~~~



-- 
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