Ticket #129 (closed defect: fixed)

Opened 6 years ago

Last modified 9 months ago

Incorrect Unicode BOM generation

Reported by: Valentin Nechayev <netchv@…> Owned by: xi
Priority: normal Component: pyyaml
Severity: normal Keywords:


py-YAML 3.07, with Python 2.5 and FreeBSD (package name py25-yaml-3.07_2)

When yaml.dump() generates stream in utf-16be or utf-16le, it generates byte-order mark (BOM), but makes it incorrectly. Example:

>>> yaml.dump("xyz", encoding = 'utf-16be')

Instead, it should generate:



--- 01/PyYAML-3.07/lib/yaml/emitter.py  2008-12-29 01:36:32.000000000 +0200
+++ work/PyYAML-3.07/lib/yaml/emitter.py        2009-06-06 16:48:39.000000000 +0300
@@ -787,7 +787,7 @@
     def write_stream_start(self):
         # Write BOM if needed.
         if self.encoding and self.encoding.startswith('utf-16'):
-            self.stream.write(u'\xFF\xFE'.encode(self.encoding))
+            self.stream.write(u'\uFEFF'.encode(self.encoding))
     def write_stream_end(self):

P.S. I guess it also should generate BOMs for utf-32*

Change History

comment:1 Changed 6 years ago by xi

  • Status changed from new to closed
  • Resolution set to fixed

Thank you for the report and the fix. Fixed in [351].

UTF-32 is not supported by the YAML specification.

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