# YAML Test Matrix

--- &test-9MAG
  Title: Flow sequence with invalid comma at the beginning
  Tags: [ error, flow, sequence ]

YAML

---
[ , a, b, c ]

Expected Events

+STR
+DOC ---
+SEQ

Expected JSON



cpp-yamlcpp-event

 invalid_incorrect
+STR
+DOC
+SEQ []
=VAL :
=VAL :a
=VAL :b
=VAL :c
-SEQ
-DOC
-STR

nim-nimyaml-event

 invalid_incorrect
+STR
+DOC ---
+SEQ
=VAL :
=VAL :a
=VAL :b
=VAL :c
-SEQ
-DOC
-STR

c-libfyaml-event

 invalid_correct
stdin:2:3: error: flow sequence with invalid comma in the beginning
[ , a, b, c ]
  ^
[NOT]: fy_parse_node() failed
+STR
+DOC ---
+SEQ []

c-libfyaml-json

 invalid_correct
stdin:2:3: error: flow sequence with invalid comma in the beginning
[ , a, b, c ]
  ^
[NOT]: fy_parse_node() failed

c-libyaml-event

 invalid_correct
Parse error: did not find expected node content
+STR
+DOC ---
+SEQ []

dotnet-yamldotnet-event

 invalid_correct
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 2, Col: 3, Idx: 6) - (Line: 2, Col: 4, Idx: 7): While parsing a node, did not find expected node content.
   at YamlDotNet.Core.Parser.ParseNode(Boolean isBlock, Boolean isIndentlessSequence)
   at YamlDotNet.Core.Parser.ParseFlowSequenceEntry(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 ---
+SEQ

dotnet-yamldotnet-json

 invalid_correct
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 2, Col: 3, Idx: 6) - (Line: 2, Col: 4, Idx: 7): While parsing a node, did not find expected node content.
   at YamlDotNet.Core.Parser.ParseNode(Boolean isBlock, Boolean isIndentlessSequence)
   at YamlDotNet.Core.Parser.ParseFlowSequenceEntry(Boolean isFirst)
   at YamlDotNet.Core.Parser.StateMachine()
   at YamlDotNet.Core.Parser.MoveNext()
   at YamlDotNet.Serialization.NodeDeserializers.CollectionNodeDeserializer.DeserializeHelper(Type tItem, IParser parser, Func`3 nestedObjectDeserializer, IList result, Boolean canUpdate)
   at YamlDotNet.Serialization.NodeDeserializers.CollectionNodeDeserializer.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)

hs-hsyaml-event

 invalid_correct
Parsing error near byte offset Pos {posByteOffset = 4, posCharOffset = 4, posLine = 2, posColumn = 0} (Lexical error near "[ , a, b, c ]")
+STR
+DOC ---
=VAL :

hs-hsyaml-json

 invalid_correct
hsyaml-parser: user error (Lexical error near "[ , a, b, c ]")

java-snakeyaml-event

 invalid_correct
Exception in thread "main" while parsing a flow node
 in 'reader', line 2, column 3:
    [ , a, b, c ]
      ^
expected the node content, but found ','
 in 'reader', line 2, column 3:
    [ , a, b, c ]
      ^

	at org.yaml.snakeyaml.parser.ParserImpl.parseNode(ParserImpl.java:518)
	at org.yaml.snakeyaml.parser.ParserImpl.parseFlowNode(ParserImpl.java:400)
	at org.yaml.snakeyaml.parser.ParserImpl.access$2600(ParserImpl.java:120)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowSequenceEntry.produce(ParserImpl.java:748)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowSequenceFirstEntry.produce(ParserImpl.java:717)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:165)
	at org.yaml.snakeyaml.Yaml$3.hasNext(Yaml.java:677)
	at org.yaml.editor.Snake2Events.yamlToEvents(Snake2Events.java:111)
	at org.yaml.editor.Snake2Events.main(Snake2Events.java:119)

java-snakeyaml-json

 invalid_correct
Exception in thread "main" while parsing a flow node
 in 'reader', line 2, column 3:
    [ , a, b, c ]
      ^
expected the node content, but found ','
 in 'reader', line 2, column 3:
    [ , a, b, c ]
      ^

	at org.yaml.snakeyaml.parser.ParserImpl.parseNode(ParserImpl.java:518)
	at org.yaml.snakeyaml.parser.ParserImpl.parseFlowNode(ParserImpl.java:400)
	at org.yaml.snakeyaml.parser.ParserImpl.access$2600(ParserImpl.java:120)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowSequenceEntry.produce(ParserImpl.java:748)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseFlowSequenceFirstEntry.produce(ParserImpl.java:717)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:165)
	at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:155)
	at org.yaml.snakeyaml.composer.Composer.composeSequenceNode(Composer.java:240)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:186)
	at org.yaml.snakeyaml.composer.Composer.getNode(Composer.java:115)
	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:18)
	at org.yaml.editor.Snake2Json.main(Snake2Json.java:25)

js-jsyaml-json

 invalid_correct
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: expected the node content, but found ',' (2:3)

 1 | ---
 2 | [ , a, b, c ]
-------^
    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:761:7)
    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)

js-yaml-event

 invalid_correct
Unexpected , in flow sequence at line 2, column 3:

[ , a, b, c ]
  ^
+STR
+DOC ---
+SEQ

js-yaml-json

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

YAMLParseError: Unexpected , in flow sequence at line 2, column 3:

[ , a, b, c ]
  ^

    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:52:17)
    at Object.composeCollection (/node/node_modules/yaml/dist/compose/compose-collection.js:21:42)
    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:31:23)
    at Composer.next (/node/node_modules/yaml/dist/compose/composer.js:152:40)
    at next (<anonymous>)
    at Composer.compose (/node/node_modules/yaml/dist/compose/composer.js:134:25)
    at compose.next (<anonymous>)
    at Function.from (<anonymous>)

lua-lyaml-json

 invalid_correct
luajit: 2:1: did not find expected node content
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:393: 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 0x55a057bfdf97

perl-pp-event

 invalid_correct
Line      : 2
Column    : 3
Expected  : ALIAS COLON FLOWMAP_START FLOWSEQ_START PLAIN PLAIN_MULTI QUOTED QUOTED_MULTILINE
Got       : FLOW_COMMA
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ", a, b, c ]\n"
  at /yaml/bin/perl-pp-event line 25.
+STR
+DOC ---
+SEQ []

perl-pp-json

 invalid_correct
Line      : 2
Column    : 3
Expected  : ALIAS COLON FLOWMAP_START FLOWSEQ_START PLAIN PLAIN_MULTI QUOTED QUOTED_MULTILINE
Got       : FLOW_COMMA
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ", a, b, c ]\n"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pp-perl

 invalid_correct
Line      : 2
Column    : 3
Expected  : ALIAS COLON FLOWMAP_START FLOWSEQ_START PLAIN PLAIN_MULTI QUOTED QUOTED_MULTILINE
Got       : FLOW_COMMA
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ", a, b, c ]\n"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pplibyaml-event

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

    did not find expected node content

was found at , line: 2, column: 3
while parsing a flow node at line: 2, column: 3

perl-pplibyaml-json

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

    did not find expected node content

was found at , line: 2, column: 3
while parsing a flow node at line: 2, column: 3

perl-pplibyaml-perl

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

    did not find expected node content

was found at , line: 2, column: 3
while parsing a flow node at line: 2, column: 3

perl-refparser-event

 invalid_correct
Parser finished before end of input at /perl5/lib/perl5/YAML/Parser.pm line 4047, <> line 1.

perl-syck-json

 invalid_correct
Syck parser (line 2, column 3): syntax error at /perl5/lib/perl5/x86_64-linux-thread-multi/YAML/Syck.pm line 60, <> line 1.

perl-syck-perl

 invalid_correct
Syck parser (line 2, column 3): syntax error at /perl5/lib/perl5/x86_64-linux-thread-multi/YAML/Syck.pm line 60, <> line 1.

perl-tiny-json

 invalid_correct
YAML::Tiny failed to classify line '[ , a, b, c ]' at /yaml/bin/perl-tiny-json line 12.

perl-tiny-perl

 invalid_correct
YAML::Tiny failed to classify line '[ , a, b, c ]' at /yaml/bin/perl-tiny-perl line 15.

perl-xs-json

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

    did not find expected node content

was found at document: 1, line: 2, column: 3
while parsing a flow node at line: 2, column: 3

perl-xs-perl

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

    did not find expected node content

was found at document: 1, line: 2, column: 3
while parsing a flow node at line: 2, column: 3

perl-yaml-json

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

perl-yaml-perl

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

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 75, 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 474, in parse_flow_sequence_first_entry
    return self.parse_flow_sequence_entry(first=True)
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 495, in parse_flow_sequence_entry
    return self.parse_flow_node()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 268, in parse_flow_node
    return self.parse_node()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 371, in parse_node
    token.start_mark)
yaml.parser.ParserError: while parsing a flow node
expected the node content, but found ','
  in "<unicode string>", line 2, column 3:
    [ , a, b, c ]
      ^
+STR
+DOC ---
+SEQ []

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 130, 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 82, in compose_node
    node = self.compose_sequence_node(anchor)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 110, in compose_sequence_node
    while not self.check_event(SequenceEndEvent):
  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 474, in parse_flow_sequence_first_entry
    return self.parse_flow_sequence_entry(first=True)
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 495, in parse_flow_sequence_entry
    return self.parse_flow_node()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 268, in parse_flow_node
    return self.parse_node()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 371, in parse_node
    token.start_mark)
yaml.parser.ParserError: while parsing a flow node
expected the node content, but found ','
  in "<unicode string>", line 2, column 3:
    [ , a, b, c ]
      ^

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 130, 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 82, in compose_node
    node = self.compose_sequence_node(anchor)
  File "/python/lib/python3.7/site-packages/yaml/composer.py", line 110, in compose_sequence_node
    while not self.check_event(SequenceEndEvent):
  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 474, in parse_flow_sequence_first_entry
    return self.parse_flow_sequence_entry(first=True)
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 495, in parse_flow_sequence_entry
    return self.parse_flow_node()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 268, in parse_flow_node
    return self.parse_node()
  File "/python/lib/python3.7/site-packages/yaml/parser.py", line 371, in parse_node
    token.start_mark)
yaml.parser.ParserError: while parsing a flow node
expected the node content, but found ','
  in "<unicode string>", line 2, column 3:
    [ , a, b, c ]
      ^

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 907, in parse
    while loader._parser.check_event():
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 140, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 642, in parse_flow_sequence_first_entry
    return self.parse_flow_sequence_entry(first=True)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 668, in parse_flow_sequence_entry
    return self.parse_flow_node()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 333, in parse_flow_node
    return self.parse_node()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 493, in parse_node
    token.start_mark,
ruamel.yaml.parser.ParserError: while parsing a flow node
expected the node content, but found ','
  in "<unicode string>", line 2, column 3:
    [ , a, b, c ]
      ^ (line: 2)
+STR
+DOC ---
+SEQ []

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 976, in load_all
    yield loader._constructor.get_data()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 106, in get_data
    return self.construct_document(self.composer.get_node())
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 68, in get_node
    return self.compose_document()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 101, in compose_document
    node = self.compose_node(None, None)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 136, in compose_node
    node = self.compose_sequence_node(anchor)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 179, in compose_sequence_node
    while not self.parser.check_event(SequenceEndEvent):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 140, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 642, in parse_flow_sequence_first_entry
    return self.parse_flow_sequence_entry(first=True)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 668, in parse_flow_sequence_entry
    return self.parse_flow_node()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 333, in parse_flow_node
    return self.parse_node()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 493, in parse_node
    token.start_mark,
ruamel.yaml.parser.ParserError: while parsing a flow node
expected the node content, but found ','
  in "<unicode string>", line 2, column 3:
    [ , a, b, c ]
      ^ (line: 2)

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 976, in load_all
    yield loader._constructor.get_data()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 106, in get_data
    return self.construct_document(self.composer.get_node())
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 68, in get_node
    return self.compose_document()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 101, in compose_document
    node = self.compose_node(None, None)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 136, in compose_node
    node = self.compose_sequence_node(anchor)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/composer.py", line 179, in compose_sequence_node
    while not self.parser.check_event(SequenceEndEvent):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 140, in check_event
    self.current_event = self.state()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 642, in parse_flow_sequence_first_entry
    return self.parse_flow_sequence_entry(first=True)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 668, in parse_flow_sequence_entry
    return self.parse_flow_node()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 333, in parse_flow_node
    return self.parse_node()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/parser.py", line 493, in parse_node
    token.start_mark,
ruamel.yaml.parser.ParserError: while parsing a flow node
expected the node content, but found ','
  in "<unicode string>", line 2, column 3:
    [ , a, b, c ]
      ^ (line: 2)

ruby-psych-json

 invalid_correct
/usr/lib/ruby/2.5.0/psych.rb:405:in `parse': (<unknown>): did not find expected node content while parsing a flow node at line 2 column 3 (Psych::SyntaxError)
	from /usr/lib/ruby/2.5.0/psych.rb:405:in `parse_stream'
	from /usr/lib/ruby/2.5.0/psych.rb:488:in `load_stream'
	from /yaml/bin/ruby-psych-json:6:in `<main>'