# YAML Test Matrix

--- &test-VJP3:00
  Title: Flow collections over many lines
  Tags: [ flow, indent ]

YAML

k: {
k
:
v
}

Expected Events

+STR
+DOC
+MAP
=VAL :k
+MAP {}

Expected JSON



cpp-rapidyaml-event

 invalid_incorrect
+STR
+DOC
+MAP
=VAL :k
+MAP
=VAL :k
=VAL :v
-MAP
-MAP
-DOC
-STR

hs-reference-yeast

 invalid_incorrect
Line  Col Char Byte Token|Content
   1    0    0    0 +DOC |
   1    0    0    0 +NODE|
   1    0    0    0 +MAP |
   1    0    0    0 +PAIR|
   1    0    0    0 +NODE|
   1    0    0    0 +VAL |
   1    0    0    0 =TEXT|k
   1    1    1    1 -VAL |
   1    1    1    1 -NODE|
   1    1    1    1 =SYNX|:
   1    2    2    2 =WSPC|.
   1    3    3    3 +NODE|
   1    3    3    3 +MAP |
   1    3    3    3 =SYNX|{
   1    4    4    4 -MAP |
   1    4    4    4 -NODE|
   1    4    4    4 =ERR |Unexpected.'\x0a'
   1    4    4    4 =REST|\x0a
   2    0    5    5 -PAIR|
   2    0    5    5 -MAP |
   2    0    5    5 -NODE|
   2    0    5    5 -DOC |
   2    0    5    5 =ERR |Unexpected.'k'

perl-syck-json

 invalid_incorrect
{
   "k" : {
      "k" : "v"
   }
}

perl-syck-perl

 invalid_incorrect
{
  'k' => {
           'k' => 'v'
         }
}

raku-yamlish-json

 invalid_incorrect
{ "k" : { "k" : "v" } }

raku-yamlish-raku

 invalid_incorrect
{
  k => {
    k => "v".Str,
  },
}

c-libfyaml-event

 invalid_correct
stdin:2:1: error: wrongly indented flow mapping
k
^
+STR
+DOC
+MAP
=VAL :k
+MAP {}

c-libfyaml-json

 invalid_correct
stdin:2:1: error: wrongly indented flow mapping
k
^

c-libyaml-event

 invalid_correct
Parse error: did not find expected ',' or '}'
+STR
+DOC
+MAP
=VAL :k
+MAP {}
=VAL :k
=VAL :

cpp-yamlcpp-event

 invalid_correct
Exception:
yaml-cpp: error at line 2, column 1: end of map flow not found
+STR
+DOC
+MAP
=VAL :k
+MAP {}
=VAL :
=VAL :

dotnet-yamldotnet-event

 invalid_correct
Unhandled exception. System.Exception: Exception of type 'System.Exception' was thrown.
   at YamlDotNet.Core.Scanner.ScanPlainScalar(Boolean& isMultiline)
   at YamlDotNet.Core.Scanner.FetchPlainScalar()
   at YamlDotNet.Core.Scanner.FetchNextToken()
   at YamlDotNet.Core.Scanner.FetchMoreTokens()
   at YamlDotNet.Core.Scanner.MoveNextWithoutConsuming()
   at YamlDotNet.Core.Parser.GetCurrentToken()
   at YamlDotNet.Core.Parser.ParseFlowMappingKey(Boolean isFirst)
   at YamlDotNet.Core.Parser.StateMachine()
   at YamlDotNet.Core.Parser.MoveNext()
   at YamlDotNet.RepresentationModel.LibYamlEventStream.WriteTo(TextWriter textWriter)
   at Program.Main(String[] commandLineArguments)
Aborted (core dumped)
+STR
+DOC
+MAP
=VAL :k
+MAP

dotnet-yamldotnet-json

 invalid_correct
Unhandled exception. YamlDotNet.Core.YamlException: (Line: 1, Col: 4, Idx: 3) - (Line: 1, Col: 4, Idx: 3): Exception during deserialization
 ---> System.Exception: Exception of type 'System.Exception' was thrown.
   at YamlDotNet.Core.Scanner.ScanPlainScalar(Boolean& isMultiline)
   at YamlDotNet.Core.Scanner.FetchPlainScalar()
   at YamlDotNet.Core.Scanner.FetchNextToken()
   at YamlDotNet.Core.Scanner.FetchMoreTokens()
   at YamlDotNet.Core.Scanner.MoveNextWithoutConsuming()
   at YamlDotNet.Core.Parser.GetCurrentToken()
   at YamlDotNet.Core.Parser.ParseFlowMappingKey(Boolean isFirst)
   at YamlDotNet.Core.Parser.StateMachine()
   at YamlDotNet.Core.Parser.MoveNext()
   at YamlDotNet.Serialization.NodeDeserializers.DictionaryNodeDeserializer.DeserializeHelper(Type tKey, Type tValue, IParser parser, Func`3 nestedObjectDeserializer, IDictionary result)
   at YamlDotNet.Serialization.NodeDeserializers.DictionaryNodeDeserializer.YamlDotNet.Serialization.INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func`3 nestedObjectDeserializer, Object& value)
   at YamlDotNet.Serialization.ValueDeserializers.NodeValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
   --- End of inner exception stack trace ---
   at YamlDotNet.Serialization.ValueDeserializers.NodeValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
   at YamlDotNet.Serialization.ValueDeserializers.AliasValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
   at YamlDotNet.Serialization.ValueDeserializers.NodeValueDeserializer.<>c__DisplayClass3_0.<DeserializeValue>b__0(IParser r, Type t)
   at YamlDotNet.Serialization.NodeDeserializers.DictionaryNodeDeserializer.DeserializeHelper(Type tKey, Type tValue, IParser parser, Func`3 nestedObjectDeserializer, IDictionary result)
   at YamlDotNet.Serialization.NodeDeserializers.DictionaryNodeDeserializer.YamlDotNet.Serialization.INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func`3 nestedObjectDeserializer, Object& value)
   at YamlDotNet.Serialization.ValueDeserializers.NodeValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
   at YamlDotNet.Serialization.ValueDeserializers.AliasValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
   at YamlDotNet.Serialization.Deserializer.Deserialize(IParser parser, Type type)
   at YamlDotNet.Serialization.Deserializer.Deserialize(TextReader input, Type type)
   at YamlDotNet.Serialization.Deserializer.Deserialize(TextReader input)
   at Program.Main(String[] commandLineArguments)
Aborted (core dumped)

go-yaml-json

 invalid_correct
yaml: line 2: did not find expected ',' or '}'

hs-hsyaml-event

 invalid_correct
Parsing error near byte offset Pos {posByteOffset = 4, posCharOffset = 4, posLine = 1, posColumn = 4} (Unexpected '
')
+STR
+DOC
+MAP
=VAL :k
+MAP {}
-MAP

hs-hsyaml-json

 invalid_correct
hsyaml-parser: user error (Unexpected '
')

java-snakeengine-event

 invalid_correct
Exception in thread "main" while parsing a flow mapping
 in reader, line 1, column 4:
    k: {
       ^
expected ',' or '}', but got :
 in reader, line 3, column 1:
    :
    ^

	at org.snakeyaml.engine.v2.parser.ParserImpl$ParseFlowMappingKey.produce(ParserImpl.java:925)
	at org.snakeyaml.engine.v2.parser.ParserImpl.lambda$produce$0(ParserImpl.java:185)
	at java.util.Optional.ifPresent(Optional.java:159)
	at org.snakeyaml.engine.v2.parser.ParserImpl.produce(ParserImpl.java:185)
	at org.snakeyaml.engine.v2.parser.ParserImpl.hasNext(ParserImpl.java:210)
	at org.yaml.editor.SnakeEngine2Events.yamlToEvents(SnakeEngine2Events.java:15)
	at org.yaml.editor.SnakeEngine2Events.main(SnakeEngine2Events.java:23)

java-snakeengine-json

 invalid_correct
Exception in thread "main" while parsing a flow mapping
 in 'reader', line 1, column 4:
    k: {
       ^
expected ',' or '}', but got :
 in 'reader', line 3, column 1:
    :
    ^

	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowMappingKey.produce(ParserImpl.java:891)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:166)
	at org.yaml.snakeyaml.comments.CommentEventsCollector$1.peek(CommentEventsCollector.java:59)
	at org.yaml.snakeyaml.comments.CommentEventsCollector$1.peek(CommentEventsCollector.java:45)
	at org.yaml.snakeyaml.comments.CommentEventsCollector.collectEvents(CommentEventsCollector.java:140)
	at org.yaml.snakeyaml.comments.CommentEventsCollector.collectEvents(CommentEventsCollector.java:119)
	at org.yaml.snakeyaml.composer.Composer.composeScalarNode(Composer.java:217)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:187)
	at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:317)
	at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:308)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:289)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:191)
	at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:317)
	at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:308)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:289)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:191)
	at org.yaml.snakeyaml.composer.Composer.getNode(Composer.java:116)
	at org.yaml.snakeyaml.constructor.BaseConstructor.getData(BaseConstructor.java:135)
	at org.yaml.snakeyaml.Yaml$1.next(Yaml.java:514)
	at org.yaml.editor.Snake2Json.yamlToJson(Snake2Json.java:20)
	at org.yaml.editor.Snake2Json.main(Snake2Json.java:27)

java-snakeyaml-event

 invalid_correct
Exception in thread "main" while parsing a flow mapping
 in 'reader', line 1, column 4:
    k: {
       ^
expected ',' or '}', but got :
 in 'reader', line 3, column 1:
    :
    ^

	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowMappingKey.produce(ParserImpl.java:891)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:166)
	at org.yaml.snakeyaml.Yaml$3.hasNext(Yaml.java:677)
	at org.yaml.editor.Snake2Events.yamlToEvents(Snake2Events.java:134)
	at org.yaml.editor.Snake2Events.main(Snake2Events.java:142)

java-snakeyaml-json

 invalid_correct
Exception in thread "main" while parsing a flow mapping
 in 'reader', line 1, column 4:
    k: {
       ^
expected ',' or '}', but got :
 in 'reader', line 3, column 1:
    :
    ^

	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowMappingKey.produce(ParserImpl.java:891)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:166)
	at org.yaml.snakeyaml.comments.CommentEventsCollector$1.peek(CommentEventsCollector.java:59)
	at org.yaml.snakeyaml.comments.CommentEventsCollector$1.peek(CommentEventsCollector.java:45)
	at org.yaml.snakeyaml.comments.CommentEventsCollector.collectEvents(CommentEventsCollector.java:140)
	at org.yaml.snakeyaml.comments.CommentEventsCollector.collectEvents(CommentEventsCollector.java:119)
	at org.yaml.snakeyaml.composer.Composer.composeScalarNode(Composer.java:217)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:187)
	at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:317)
	at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:308)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:289)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:191)
	at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:317)
	at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:308)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:289)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:191)
	at org.yaml.snakeyaml.composer.Composer.getNode(Composer.java:116)
	at org.yaml.snakeyaml.constructor.BaseConstructor.getData(BaseConstructor.java:135)
	at org.yaml.snakeyaml.Yaml$1.next(Yaml.java:514)
	at org.yaml.editor.Snake2Json.yamlToJson(Snake2Json.java:20)
	at org.yaml.editor.Snake2Json.main(Snake2Json.java:27)

js-jsyaml-json

 invalid_correct
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: missed comma between flow collection entries (3:1)

 1 | k: {
 2 | k
 3 | :
-----^
 4 | v
 5 | }
    at generateError (/node/node_modules/js-yaml/lib/loader.js:183:10)
    at throwError (/node/node_modules/js-yaml/lib/loader.js:187:9)
    at readFlowCollection (/node/node_modules/js-yaml/lib/loader.js:758:7)
    at composeNode (/node/node_modules/js-yaml/lib/loader.js:1442:11)
    at readBlockMapping (/node/node_modules/js-yaml/lib/loader.js:1164:11)
    at composeNode (/node/node_modules/js-yaml/lib/loader.js:1441:12)
    at readDocument (/node/node_modules/js-yaml/lib/loader.js:1625:3)
    at loadDocuments (/node/node_modules/js-yaml/lib/loader.js:1688:5)
    at Object.loadAll (/node/node_modules/js-yaml/lib/loader.js:1701:19)
    at Object.<anonymous> (/yaml/bin/js-jsyaml-json:7:13)

js-yaml-event

 invalid_correct
Flow map in block collection must be sufficiently indented and end with a } at line 2, column 1:

k: {
k
^
+STR
+DOC
+MAP
=VAL :k
+MAP {}
-MAP

js-yaml-json

 invalid_correct
/yaml/bin/js-yaml-json:8
  if (doc.errors.length !== 0) throw doc.errors[0]
                               ^

YAMLParseError: Flow map in block collection must be sufficiently indented and end with a } at line 2, column 1:

k: {
k
^

    at Composer.onError (/node/node_modules/yaml/dist/compose/composer.js:71:34)
    at Object.resolveFlowCollection (/node/node_modules/yaml/dist/compose/resolve-flow-collection.js:182:9)
    at Object.composeCollection (/node/node_modules/yaml/dist/compose/compose-collection.js:21:42)
    at composeNode (/node/node_modules/yaml/dist/compose/compose-node.js:30:38)
    at Object.resolveBlockMap (/node/node_modules/yaml/dist/compose/resolve-block-map.js:79:19)
    at Object.composeCollection (/node/node_modules/yaml/dist/compose/compose-collection.js:13:36)
    at Object.composeNode (/node/node_modules/yaml/dist/compose/compose-node.js:30:38)
    at Object.composeDoc (/node/node_modules/yaml/dist/compose/compose-doc.js:32:23)
    at Composer.next (/node/node_modules/yaml/dist/compose/composer.js:152:40)
    at next (<anonymous>)

lua-lyaml-json

 invalid_correct
luajit: 3:1: did not find expected ',' or '}'
stack traceback:
	[C]: in function 'error'
	/usr/local/share/lua/5.1/lyaml/init.lua:306: in function 'error'
	/usr/local/share/lua/5.1/lyaml/init.lua:325: in function 'parse'
	/usr/local/share/lua/5.1/lyaml/init.lua:443: in function 'load_node'
	/usr/local/share/lua/5.1/lyaml/init.lua:340: in function 'load_node'
	/usr/local/share/lua/5.1/lyaml/init.lua:378: in function 'load_node'
	/usr/local/share/lua/5.1/lyaml/init.lua:497: in function 'load'
	/yaml/bin/lua-lyaml-json:6: in main chunk
	[C]: at 0x561f83265f97

nim-nimyaml-event

 invalid_correct
/tmp/NimYAML-0.16.0/yaml/stream.nim(134) nimyaml_event
/tmp/NimYAML-0.16.0/yaml/stream.nim(99) next
/tmp/NimYAML-0.16.0/yaml/parser.nim(160) :anonymous
/tmp/NimYAML-0.16.0/yaml/parser.nim(470) atBlockIndentationProps
/tmp/NimYAML-0.16.0/yaml/stream.nim(106) next
[[reraised from:
/tmp/NimYAML-0.16.0/yaml/stream.nim(134) nimyaml_event
/tmp/NimYAML-0.16.0/yaml/stream.nim(101) next
]]
Error: unhandled exception: Too few indentation spaces (must surpass surrounding block level) [YamlStreamError]
+STR
+DOC
+MAP
=VAL :k

perl-pp-event

 invalid_correct
Line      : 2
Column    : 1
Message   : Bad indendation in FLOWMAP
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 199
YAML      : "k\n"
  at /yaml/bin/perl-pp-event line 25.
+STR
+DOC
+MAP
=VAL :k
+MAP {}

perl-pp-json

 invalid_correct
Line      : 2
Column    : 1
Message   : Bad indendation in FLOWMAP
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 199
YAML      : "k\n"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pp-perl

 invalid_correct
Line      : 2
Column    : 1
Message   : Bad indendation in FLOWMAP
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 199
YAML      : "k\n"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pplibyaml-json

 invalid_correct
YAML::PP::LibYAML Error: The problem:

    did not find expected ',' or '}'

was found at , line: 3, column: 1
while parsing a flow mapping at line: 1, column: 4

perl-pplibyaml-perl

 invalid_correct
YAML::PP::LibYAML Error: The problem:

    did not find expected ',' or '}'

was found at , line: 3, column: 1
while parsing a flow mapping at line: 1, column: 4

perl-refparser-event

 invalid_correct
Parser finished before end of input at /perl5/lib/perl5/YAML/Parser.pm line 4056, <> line 1.

perl-tiny-json

 invalid_correct
YAML::Tiny failed to classify line 'k' at /yaml/bin/perl-tiny-json line 12.

perl-tiny-perl

 invalid_correct
YAML::Tiny failed to classify line 'k' at /yaml/bin/perl-tiny-perl line 15.

perl-xs-json

 invalid_correct
YAML::XS::Load Error: The problem:

    did not find expected ',' or '}'

was found at document: 1, line: 3, column: 1
while parsing a flow mapping at line: 1, column: 4

perl-xs-perl

 invalid_correct
YAML::XS::Load Error: The problem:

    did not find expected ',' or '}'

was found at document: 1, line: 3, column: 1
while parsing a flow mapping at line: 1, column: 4

perl-yaml-json

 invalid_correct
YAML Error: Can't parse inline map
   Code: YAML_PARSE_ERR_INLINE_MAP
   Line: 2
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 522.

perl-yaml-perl

 invalid_correct
YAML Error: Can't parse inline map
   Code: YAML_PARSE_ERR_INLINE_MAP
   Line: 2
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 522.

py-pyyaml-event

 invalid_correct
Traceback (most recent call last):
  File "/yaml/bin/py-pyyaml-event", line 7, in <module>
    for event in yaml.parse(sys.stdin.read()):
  File "/python/lib/python3.7/site-packages/yaml/__init__.py", line 46, in parse
    while loader.check_event():
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 550, in parse_flow_mapping_key
    "expected ',' or '}', but got %r" % token.id, token.start_mark)
yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 4:
    k: {
       ^
expected ',' or '}', but got ':'
  in "<unicode string>", line 3, column 1:
    :
    ^
+STR
+DOC
+MAP
=VAL :k
+MAP {}
=VAL :k
=VAL :

py-pyyaml-json

 invalid_correct
Traceback (most recent call last):
  File "/yaml/bin/py-pyyaml-json", line 19, in <module>
    for doc in yaml.load_all(sys.stdin.read(), Loader=yaml.FullLoader):
  File "/python/lib/python3.7/site-packages/yaml/__init__.py", line 93, in load_all
    yield loader.get_data()
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 45, in get_data
    return self.construct_document(self.get_node())
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 27, in get_node
    return self.compose_document()
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 55, in compose_document
    node = self.compose_node(None, None)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 127, in compose_mapping_node
    while not self.check_event(MappingEndEvent):
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 550, in parse_flow_mapping_key
    "expected ',' or '}', but got %r" % token.id, token.start_mark)
yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 4:
    k: {
       ^
expected ',' or '}', but got ':'
  in "<unicode string>", line 3, column 1:
    :
    ^

py-pyyaml-py

 invalid_correct
Traceback (most recent call last):
  File "/yaml/bin/py-pyyaml-py", line 36, in <module>
    for doc in yaml.load_all(sys.stdin.read(), Loader=yaml.FullLoader):
  File "/python/lib/python3.7/site-packages/yaml/__init__.py", line 93, in load_all
    yield loader.get_data()
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 45, in get_data
    return self.construct_document(self.get_node())
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 27, in get_node
    return self.compose_document()
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 55, in compose_document
    node = self.compose_node(None, None)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 127, in compose_mapping_node
    while not self.check_event(MappingEndEvent):
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 550, in parse_flow_mapping_key
    "expected ',' or '}', but got %r" % token.id, token.start_mark)
yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 4:
    k: {
       ^
expected ',' or '}', but got ':'
  in "<unicode string>", line 3, column 1:
    :
    ^

py-ruamel-event

 invalid_correct
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-event", line 7, in <module>
    for event in ruamel.yaml.parse(sys.stdin.read()):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/main.py", line 1024, in parse
    while loader._parser.check_event():
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 146, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 757, in parse_flow_mapping_key
    token.start_mark,
ruamel.yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 4:
    k: {
       ^ (line: 1)
expected ',' or '}', but got ':'
  in "<unicode string>", line 3, column 1:
    :
    ^ (line: 3)
+STR
+DOC
+MAP
=VAL :k
+MAP {}
=VAL :k
=VAL :

py-ruamel-json

 invalid_correct
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-json", line 19, in <module>
    for doc in ruamel.yaml.load_all(sys.stdin.read(), Loader=ruamel.yaml.Loader):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/main.py", line 1097, in load_all
    yield loader._constructor.get_data()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 114, in get_data
    return self.construct_document(self.composer.get_node())
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 66, in get_node
    return self.compose_document()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 99, in compose_document
    node = self.compose_node(None, None)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 143, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 223, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 143, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 216, in compose_mapping_node
    while not self.parser.check_event(MappingEndEvent):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 146, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 757, in parse_flow_mapping_key
    token.start_mark,
ruamel.yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 4:
    k: {
       ^ (line: 1)
expected ',' or '}', but got ':'
  in "<unicode string>", line 3, column 1:
    :
    ^ (line: 3)

py-ruamel-py

 invalid_correct
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-py", line 36, in <module>
    for doc in ruamel.yaml.load_all(sys.stdin.read(), Loader=ruamel.yaml.Loader):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/main.py", line 1097, in load_all
    yield loader._constructor.get_data()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 114, in get_data
    return self.construct_document(self.composer.get_node())
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 66, in get_node
    return self.compose_document()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 99, in compose_document
    node = self.compose_node(None, None)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 143, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 223, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 143, in compose_node
    node = self.compose_mapping_node(anchor)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 216, in compose_mapping_node
    while not self.parser.check_event(MappingEndEvent):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 146, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 757, in parse_flow_mapping_key
    token.start_mark,
ruamel.yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 4:
    k: {
       ^ (line: 1)
expected ',' or '}', but got ':'
  in "<unicode string>", line 3, column 1:
    :
    ^ (line: 3)

ruby-psych-json

 invalid_correct
/ruby/gems/psych/lib/psych.rb:459:in `parse': (<unknown>): did not find expected ',' or '}' while parsing a flow mapping at line 1 column 4 (Psych::SyntaxError)
	from /ruby/gems/psych/lib/psych.rb:459:in `parse_stream'
	from /ruby/gems/psych/lib/psych.rb:565:in `load_stream'
	from /yaml/bin/ruby-psych-json:6:in `<main>'

rust-yamlrust-event

 invalid_correct
Error: ScanError { mark: Marker { index: 7, line: 3, col: 0 }, info: "simple key expect ':'" }
+STR
+DOC
+MAP
=VAL :k
+MAP