fix for 3940.17.12

when the newly created object has the signature __attrs_attrs__ attribute
initialisation is not done using update by by calling __init__()

5 files changed, 17 insertions, 6 deletions

diff --git a/CHANGES b/CHANGES
index ee17046..2383909 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+[0, 17, 12]: 2021-08-21
+  - fix issue with anchor on registered class not preserved and those classes using package 
+    attrs with `@attr.s()` (both reported by `ssph <https://sourceforge.net/u/sph/>`__)
+
 [0, 17, 11]: 2021-08-19
   - fix error baseclass for ``DuplicateKeyErorr`` (reported by `Łukasz Rogalski
     <https://sourceforge.net/u/lrogalski/>`__)
diff --git a/README.rst b/README.rst
index 16abf3d..a3b9dbf 100644
--- a/README.rst
+++ b/README.rst
@@ -4,8 +4,8 @@ ruamel.yaml
 
 ``ruamel.yaml`` is a YAML 1.2 loader/dumper package for Python.
 
-:version:       0.17.11
-:updated:       2021-08-19
+:version:       0.17.12
+:updated:       2021-08-21
 :documentation: http://yaml.readthedocs.io
 :repository:    https://sourceforge.net/projects/ruamel-yaml/
 :pypi:          https://pypi.org/project/ruamel.yaml/
@@ -72,6 +72,10 @@ ChangeLog
 
 .. should insert NEXT: at the beginning of line for next key (with empty line)
 
+0.17.12 (2021-08-21):
+  - fix issue with anchor on registered class not preserved and those classes using package 
+    attrs with `@attr.s()` (both reported by `ssph <https://sourceforge.net/u/sph/>`__)
+
 0.17.11 (2021-08-19):
   - fix error baseclass for ``DuplicateKeyErorr`` (reported by `Łukasz Rogalski
     <https://sourceforge.net/u/lrogalski/>`__)
diff --git a/__init__.py b/__init__.py
index 4ecaef9..cbee327 100644
--- a/__init__.py
+++ b/__init__.py
@@ -5,8 +5,8 @@ if False:  # MYPY
 
 _package_data = dict(
     full_package_name='ruamel.yaml',
-    version_info=(0, 17, 11),
-    __version__='0.17.11',
+    version_info=(0, 17, 12),
+    __version__='0.17.12',
     author='Anthon van der Neut',
     author_email='a.van.der.neut@ruamel.eu',
     description='ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order',  # NOQA
diff --git a/_doc/_static/pypi.svg b/_doc/_static/pypi.svg
index 3364900..f0abbb9 100644
--- a/_doc/_static/pypi.svg
+++ b/_doc/_static/pypi.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="86" height="20"><linearGradient id="b" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="a"><rect width="86" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#a)"><path fill="#555" d="M0 0h33v20H0z"/><path fill="#007ec6" d="M33 0h53v20H33z"/><path fill="url(#b)" d="M0 0h86v20H0z"/></g><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110"> <text x="175" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="230">pypi</text><text x="175" y="140" transform="scale(.1)" textLength="230">pypi</text><text x="585" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="430">0.17.11</text><text x="585" y="140" transform="scale(.1)" textLength="430">0.17.11</text></g> </svg>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="86" height="20"><linearGradient id="b" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="a"><rect width="86" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#a)"><path fill="#555" d="M0 0h33v20H0z"/><path fill="#007ec6" d="M33 0h53v20H33z"/><path fill="url(#b)" d="M0 0h86v20H0z"/></g><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110"> <text x="175" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="230">pypi</text><text x="175" y="140" transform="scale(.1)" textLength="230">pypi</text><text x="585" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="430">0.17.12</text><text x="585" y="140" transform="scale(.1)" textLength="430">0.17.12</text></g> </svg>
diff --git a/constructor.py b/constructor.py
index 3cc76a3..1673479 100644
--- a/constructor.py
+++ b/constructor.py
@@ -1635,7 +1635,10 @@ class RoundTripConstructor(SafeConstructor):
             data.__setstate__(state)
         else:
             state = SafeConstructor.construct_mapping(self, node)
-            data.__dict__.update(state)
+            if hasattr(data, '__attrs_attrs__'):  # issue 394
+                cls.__init__(cls, **state)
+            else:
+                data.__dict__.update(state)
         if node.anchor:
             from ruamel.yaml.serializer import templated_id
             from ruamel.yaml.anchor import Anchor