# YAML Test Matrix

--- &test-4MUZ:02
  Title: Flow mapping colon on line after key
  Tags: [ flow, mapping ]

YAML

{foo
: bar}

Expected Events

+STR
+DOC
+MAP {}
=VAL :foo
=VAL :bar
-MAP
-DOC
-STR

Expected JSON

{
"foo": "bar"
}

c-libfyaml-event

 ok

cpp-rapidyaml-event

 ok

hs-hsyaml-event

 ok

js-yaml-event

 ok

nim-nimyaml-event

 ok

perl-pp-event

 ok

perl-refparser-event

 ok

c-libfyaml-json

 json_ok

hs-hsyaml-json

 json_ok

js-yaml-json

 json_ok

perl-pp-json

 json_ok

perl-syck-json

 json_ok

c-libyaml-event

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

cpp-yamlcpp-event

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

dotnet-yamldotnet-event

 error
+STR
+DOC
+MAP
=VAL :foo
=VAL :
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 2, Col: 1, Idx: 5) - (Line: 2, Col: 1, Idx: 5): While parsing a flow mapping,  did not find expected ',' or '}'.
   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)

dotnet-yamldotnet-json

 error
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 2, Col: 1, Idx: 5) - (Line: 2, Col: 1, Idx: 5): While parsing a flow mapping,  did not find expected ',' or '}'.
   at YamlDotNet.Core.Parser.ParseFlowMappingKey(Boolean isFirst)
   at YamlDotNet.Core.Parser.StateMachine()
   at YamlDotNet.Core.Parser.MoveNext()
   at YamlDotNet.Core.ParserExtensions.SkipThisAndNestedEvents(IParser parser)
   at YamlDotNet.Serialization.NodeDeserializers.NullNodeDeserializer.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.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

 error
yaml: line 1: did not find expected ',' or '}'

js-jsyaml-json

 error
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: missed comma between flow collection entries (2:1)

 1 | {foo
 2 | : bar}
-----^
    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:1104:12)
    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) {
  reason: 'missed comma between flow collection entries',
  mark: {
    name: null,
    buffer: '{foo\n: bar}\n',
    position: 5,
    line: 1,
    column: 0,
    snippet: ' 1 | {foo\n 2 | : bar}\n-----^'
  }
}

Node.js v20.13.1

lua-lyaml-json

 error
luajit: 2:1: 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:497: in function 'load'
	/yaml/bin/lua-lyaml-json:6: in main chunk
	[C]: at 0x56152963ced0

perl-pplibyaml-json

 error
YAML::PP::LibYAML Error: The problem:

    did not find expected ',' or '}'

was found at , line: 2, column: 1
while parsing a flow mapping at line: 1, column: 1

perl-pplibyaml-perl

 error
YAML::PP::LibYAML Error: The problem:

    did not find expected ',' or '}'

was found at , line: 2, column: 1
while parsing a flow mapping at line: 1, column: 1

perl-xs-json

 error
YAML::XS::Load Error: The problem:

    did not find expected ',' or '}'

was found at document: 1, line: 2, column: 1
while parsing a flow mapping at line: 1, column: 1

perl-xs-perl

 error
YAML::XS::Load Error: The problem:

    did not find expected ',' or '}'

was found at document: 1, line: 2, column: 1
while parsing a flow mapping at line: 1, column: 1

perl-yaml-json

 error
YAML Error: Expected separator '---'
   Code: YAML_PARSE_ERR_NO_SEPARATOR
   Line: 1
   Document: 2
 at /perl5/lib/perl5/YAML/Loader.pm line 88.

perl-yaml-perl

 error
YAML Error: Expected separator '---'
   Code: YAML_PARSE_ERR_NO_SEPARATOR
   Line: 1
   Document: 2
 at /perl5/lib/perl5/YAML/Loader.pm line 88.

py-pyyaml-event

 error
+STR
+DOC
+MAP {}
=VAL :foo
=VAL :
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/python3.12/site-packages/yaml/__init__.py", line 75, in parse
    while loader.check_event():
          ^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/parser.py", line 549, in parse_flow_mapping_key
    raise ParserError("while parsing a flow mapping", self.marks[-1],
yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 1:
    {foo
    ^
expected ',' or '}', but got ':'
  in "<unicode string>", line 2, column 1:
    : bar}
    ^

py-pyyaml-json

 error
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/python3.12/site-packages/yaml/__init__.py", line 130, in load_all
    yield loader.get_data()
          ^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/constructor.py", line 45, in get_data
    return self.construct_document(self.get_node())
                                   ^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 27, in get_node
    return self.compose_document()
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 55, in compose_document
    node = self.compose_node(None, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 127, in compose_mapping_node
    while not self.check_event(MappingEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/parser.py", line 549, in parse_flow_mapping_key
    raise ParserError("while parsing a flow mapping", self.marks[-1],
yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 1:
    {foo
    ^
expected ',' or '}', but got ':'
  in "<unicode string>", line 2, column 1:
    : bar}
    ^

py-pyyaml-py

 error
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/python3.12/site-packages/yaml/__init__.py", line 130, in load_all
    yield loader.get_data()
          ^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/constructor.py", line 45, in get_data
    return self.construct_document(self.get_node())
                                   ^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 27, in get_node
    return self.compose_document()
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 55, in compose_document
    node = self.compose_node(None, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 127, in compose_mapping_node
    while not self.check_event(MappingEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/parser.py", line 549, in parse_flow_mapping_key
    raise ParserError("while parsing a flow mapping", self.marks[-1],
yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 1:
    {foo
    ^
expected ',' or '}', but got ':'
  in "<unicode string>", line 2, column 1:
    : bar}
    ^

py-ruamel-event

 error
+STR
+DOC
+MAP {}
=VAL :foo
=VAL :
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-event", line 9, in <module>
    for event in yaml.parse(sys.stdin.read()):
  File "/python/lib/python3.12/site-packages/ruamel/yaml/main.py", line 371, in parse
    while parser.check_event():
          ^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/parser.py", line 141, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/parser.py", line 747, in parse_flow_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 1:
    {foo
    ^ (line: 1)
expected ',' or '}', but got ':'
  in "<unicode string>", line 2, column 1:
    : bar}
    ^ (line: 2)

py-ruamel-json

 error
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-json", line 21, in <module>
    for doc in yaml.load_all(sys.stdin.read()):
  File "/python/lib/python3.12/site-packages/ruamel/yaml/main.py", line 476, in load_all
    yield constructor.get_data()
          ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/constructor.py", line 110, in get_data
    return self.construct_document(self.composer.get_node())
                                   ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 63, in get_node
    return self.compose_document()
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 94, in compose_document
    node = self.compose_node(None, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 130, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 204, in compose_mapping_node
    while not self.parser.check_event(MappingEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/parser.py", line 141, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/parser.py", line 747, in parse_flow_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 1:
    {foo
    ^ (line: 1)
expected ',' or '}', but got ':'
  in "<unicode string>", line 2, column 1:
    : bar}
    ^ (line: 2)

py-ruamel-py

 error
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-py", line 38, in <module>
    for doc in yaml.load_all(sys.stdin.read()):
  File "/python/lib/python3.12/site-packages/ruamel/yaml/main.py", line 476, in load_all
    yield constructor.get_data()
          ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/constructor.py", line 110, in get_data
    return self.construct_document(self.composer.get_node())
                                   ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 63, in get_node
    return self.compose_document()
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 94, in compose_document
    node = self.compose_node(None, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 130, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 204, in compose_mapping_node
    while not self.parser.check_event(MappingEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/parser.py", line 141, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/parser.py", line 747, in parse_flow_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a flow mapping
  in "<unicode string>", line 1, column 1:
    {foo
    ^ (line: 1)
expected ',' or '}', but got ':'
  in "<unicode string>", line 2, column 1:
    : bar}
    ^ (line: 2)

ruby-psych-json

 error
/ruby/gems/psych/lib/psych.rb:458:in `parse': (<unknown>): did not find expected ',' or '}' while parsing a flow mapping at line 1 column 1 (Psych::SyntaxError)
	from /ruby/gems/psych/lib/psych.rb:458:in `parse_stream'
	from /ruby/gems/psych/lib/psych.rb:632:in `load_stream'
	from /yaml/bin/ruby-psych-json:6:in `<main>'

rust-yamlrust-event

 error
+STR
+DOC
+MAP
=VAL :foo
=VAL :
Error: ScanError { mark: Marker { index: 5, line: 2, col: 0 }, info: "while parsing a flow mapping, did not find expected ',' or '}'" }

hs-reference-yeast

 na
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 =SYNX|{
   1    1    1    1 +PAIR|
   1    1    1    1 +NODE|
   1    1    1    1 +VAL |
   1    1    1    1 =TEXT|foo
   1    4    4    4 -VAL |
   1    4    4    4 -NODE|
   1    4    4    4 =EOL |\x0a
   2    0    5    5 =SYNX|:
   2    1    6    6 =WSPC|.
   2    2    7    7 +NODE|
   2    2    7    7 +VAL |
   2    2    7    7 =TEXT|bar
   2    5   10   10 -VAL |
   2    5   10   10 -NODE|
   2    5   10   10 -PAIR|
   2    5   10   10 =SYNX|}
   2    6   11   11 -MAP |
   2    6   11   11 -NODE|
   2    6   11   11 =EOL |\x0a
   3    0   12   12 -DOC |

perl-pp-perl

 na
{
  'foo' => 'bar'
}

perl-syck-perl

 na
{
  'foo' => 'bar'
}

perl-tiny-json

 ni
YAML::Tiny failed to classify line '{foo' at /yaml/bin/perl-tiny-json line 12.

perl-tiny-perl

 ni
YAML::Tiny failed to classify line '{foo' at /yaml/bin/perl-tiny-perl line 15.