fix indexing error on empty list for merge-key position0.15.87

6 files changed, 22 insertions, 7 deletions

diff --git a/CHANGES b/CHANGES
index d56f30e..574758a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,11 @@
+[0, 15, 87]: 2019-01-22
+  - fix problem with empty lists and the code to reinsert merge keys (reported via email 
+     by Zaloo)
+
+[0, 15, 87]: 2019-01-22
+  - fix problem with empty lists and the code to reinsert merge keys (reported via email 
+    by Zaloo)
+
 [0, 15, 86]: 2019-01-16
   - reinsert merge key in its old position (reported by grumbler on
     <Stackoverflow <https://stackoverflow.com/a/54206512/1307905>`__)
diff --git a/README.rst b/README.rst
index 809dd10..b62889d 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:       0.15.86
-:updated:       2019-01-16
+:version:       0.15.87
+:updated:       2019-01-22
 :documentation: http://yaml.readthedocs.io
 :repository:    https://bitbucket.org/ruamel/
 :pypi:          https://pypi.org/project/ruamel.yaml/
@@ -54,6 +54,10 @@ ChangeLog
 
 .. should insert NEXT: at the beginning of line for next key (with empty line)
 
+0.15.87 (2019-01-22):
+  - fix problem with empty lists and the code to reinsert merge keys (reported via email 
+     by Zaloo)
+
 0.15.86 (2019-01-16):
   - reinsert merge key in its old position (reported by grumbler on
     <Stackoverflow <https://stackoverflow.com/a/54206512/1307905>`__)
diff --git a/__init__.py b/__init__.py
index 1cb3f30..f03f94d 100644
--- a/__init__.py
+++ b/__init__.py
@@ -7,8 +7,8 @@ if False:  # MYPY
 
 _package_data = dict(
     full_package_name='ruamel.yaml',
-    version_info=(0, 15, 86),
-    __version__='0.15.86',
+    version_info=(0, 15, 87),
+    __version__='0.15.87',
     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 23fc356..a142d11 100644
--- a/_doc/_static/pypi.svg
+++ b/_doc/_static/pypi.svg
@@ -1 +1 @@
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+<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">0.15.87</text><text x="585" y="140" transform="scale(.1)" textLength="430">0.15.87</text></g> </svg>
diff --git a/main.py b/main.py
index f06c52e..184c7ad 100644
--- a/main.py
+++ b/main.py
@@ -324,7 +324,7 @@ class YAML(object):
         """
         if not hasattr(stream, 'read') and hasattr(stream, 'open'):
             # pathlib.Path() instance
-            with stream.open('r') as fp:  # type: ignore
+            with stream.open('rb') as fp:  # type: ignore
                 return self.load(fp)
         constructor, parser = self.get_constructor_parser(stream)
         try:
diff --git a/representer.py b/representer.py
index 7b2f007..859887c 100644
--- a/representer.py
+++ b/representer.py
@@ -1002,7 +1002,10 @@ class RoundTripRepresenter(SafeRepresenter):
         except AttributeError:
             item_comments = {}
         merge_list = [m[1] for m in getattr(mapping, merge_attrib, [])]
-        merge_pos = getattr(mapping, merge_attrib, [[0]])[0][0]
+        try:
+            merge_pos = getattr(mapping, merge_attrib, [[0]])[0][0]
+        except IndexError:
+            merge_pos = 0
         item_count = 0
         if bool(merge_list):
             items = mapping.non_merged_items()