# YAML Test Matrix

--- &test-9CWY
  Title: Invalid scalar at the end of mapping
  Tags: [ error, mapping, sequence ]

YAML

key:
 - item1
 - item2
invalid

Expected Events

+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ

Expected JSON






   


cpp-rapidyaml-event

 invalid_incorrect 
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ
=VAL :invalid
=VAL :
-MAP
-DOC
-STR


 



  


cpp-yamlcpp-event

 invalid_incorrect 
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ
=VAL :invalid
=VAL :
-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|key
   1    3    3    3 -VAL |
   1    3    3    3 -NODE|
   1    3    3    3 =SYNX|:
   1    4    4    4 +NODE|
   1    4    4    4 =EOL |\x0a
   2    0    5    5 +SEQ |
   2    0    5    5 =DENT|.
   2    1    6    6 =SYNX|-
   2    2    7    7 =WSPC|.
   2    3    8    8 +NODE|
   2    3    8    8 +VAL |
   2    3    8    8 =TEXT|item1
   2    8   13   13 -VAL |
   2    8   13   13 -NODE|
   2    8   13   13 =EOL |\x0a
   3    0   14   14 =DENT|.
   3    1   15   15 =SYNX|-
   3    2   16   16 =WSPC|.
   3    3   17   17 +NODE|
   3    3   17   17 +VAL |
   3    3   17   17 =TEXT|item2
   3    8   22   22 -VAL |
   3    8   22   22 -NODE|
   3    8   22   22 =EOL |\x0a
   4    0   23   23 -SEQ |
   4    0   23   23 -NODE|
   4    0   23   23 -PAIR|
   4    0   23   23 -MAP |
   4    0   23   23 -NODE|
   4    0   23   23 -DOC |
   4    0   23   23 =ERR |Unexpected.'i'


 



 
    


c-libfyaml-event

 invalid_correct 
stdin:4:1: error: invalid value after mapping
invalid
^~~~~~~
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ


 



  


c-libfyaml-json

 invalid_correct 
stdin:4:1: error: invalid value after mapping
invalid
^~~~~~~


 



  


c-libyaml-event

 invalid_correct 
Parse error: could not find expected ':'
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2


 



  


dotnet-yamldotnet-event

 invalid_correct 
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 4, Col: 1, Idx: 23) - (Line: 4, Col: 8, Idx: 30): While parsing a block mapping, did not find expected key.
   at YamlDotNet.Core.Parser.ParseBlockMappingKey(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 :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ


 



  


dotnet-yamldotnet-json

 invalid_correct 
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 4, Col: 1, Idx: 23) - (Line: 4, Col: 8, Idx: 30): While parsing a block mapping, did not find expected key.
   at YamlDotNet.Core.Parser.ParseBlockMappingKey(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.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 5: could not find expected ':'


 



  


hs-hsyaml-event

 invalid_correct 
Parsing error near byte offset Pos {posByteOffset = 23, posCharOffset = 23, posLine = 4, posColumn = 0} (Unexpected 'i')
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ
-MAP
-DOC


 



  


hs-hsyaml-json

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


 



  


js-jsyaml-json

 invalid_correct 
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: can not read a block mapping entry; a multiline key may not be an implicit key (5:1)

 2 |  - item1
 3 |  - item2
 4 | invalid
 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 readBlockMapping (/node/node_modules/js-yaml/lib/loader.js:1145:9)
    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)
    at Module._compile (node:internal/modules/cjs/loader:1358:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1416:10) {
  reason: 'can not read a block mapping entry; a multiline key may not be an implicit key',
  mark: {
    name: null,
    buffer: 'key:\n - item1\n - item2\ninvalid\n',
    position: 31,
    line: 4,
    column: 0,
    snippet: ' 2 |  - item1\n 3 |  - item2\n 4 | invalid\n 5 | \n-----^'
  }
}

Node.js v20.13.1


 



  


js-yaml-event

 invalid_correct 
Implicit map keys need to be followed by map values at line 4, column 1:

 - item2
invalid
^^^^^^^
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ


 



  


js-yaml-json

 invalid_correct 
/yaml/bin/js-yaml-json:9
    if (doc.errors.length !== 0) throw doc.errors[0]
                                 ^

YAMLParseError: Implicit map keys need to be followed by map values at line 4, column 1:

 - item2
invalid
^^^^^^^

    at Composer.onError (/node/node_modules/yaml/dist/compose/composer.js:69:34)
    at Object.resolveBlockMap (/node/node_modules/yaml/dist/compose/resolve-block-map.js:96:17)
    at resolveCollection (/node/node_modules/yaml/dist/compose/compose-collection.js:13:27)
    at Object.composeCollection (/node/node_modules/yaml/dist/compose/compose-collection.js:47:16)
    at Object.composeNode (/node/node_modules/yaml/dist/compose/compose-node.js:31:38)
    at Object.composeDoc (/node/node_modules/yaml/dist/compose/compose-doc.js:34:23)
    at Composer.next (/node/node_modules/yaml/dist/compose/composer.js:149:40)
    at next (<anonymous>)
    at Composer.compose (/node/node_modules/yaml/dist/compose/composer.js:131:25)
    at compose.next (<anonymous>) {
  code: 'MISSING_CHAR',
  pos: [ 23, 30 ],
  linePos: [ { line: 4, col: 1 }, { line: 4, col: 8 } ]
}

Node.js v20.13.1


 



  


lua-lyaml-json

 invalid_correct 
luajit: 3:4: could not find expected ':'
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: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 0x55960b442ed0


 



  


nim-nimyaml-event

 invalid_correct 
/tmp/NimYAML-0.16.0/yaml/stream.nim(134) nimyaml_event
/tmp/NimYAML-0.16.0/yaml/stream.nim(106) next
Error: unhandled exception: Unexpected token (expected ':'): StreamEnd [YamlStreamError]
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ
=VAL :invalid


 



  


perl-pp-event

 invalid_correct 
Line      : 4
Column    : 8
Expected  : COLON WS
Got       : EOL
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ""
  at /yaml/bin/perl-pp-event line 46.
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ


 



  


perl-pp-json

 invalid_correct 
Line      : 4
Column    : 8
Expected  : COLON WS
Got       : EOL
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ""
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.


 



  


perl-pp-perl

 invalid_correct 
Line      : 4
Column    : 8
Expected  : COLON WS
Got       : EOL
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ""
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.


 



  


perl-pplibyaml-json

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

    could not find expected ':'

was found at , line: 5, column: 1
while scanning a simple key at line: 4, column: 1


 



  


perl-pplibyaml-perl

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

    could not find expected ':'

was found at , line: 5, column: 1
while scanning a simple key at line: 4, column: 1


 



  


perl-refparser-event

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


 



  


perl-syck-json

 invalid_correct 
Syck parser (line 5, column -1): 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 5, column -1): 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 'invalid' at /yaml/bin/perl-tiny-json line 12.


 



  


perl-tiny-perl

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


 



  


perl-xs-json

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

    could not find expected ':'

was found at document: 1, line: 5, column: 1
while scanning a simple key at line: 4, column: 1


 



  


perl-xs-perl

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

    could not find expected ':'

was found at document: 1, line: 5, column: 1
while scanning a simple key at line: 4, column: 1


 



  


perl-yaml-json

 invalid_correct 
YAML Error: Invalid element in map
   Code: YAML_LOAD_ERR_BAD_MAP_ELEMENT
   Line: 4
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 360.


 



  


perl-yaml-perl

 invalid_correct 
YAML Error: Invalid element in map
   Code: YAML_LOAD_ERR_BAD_MAP_ELEMENT
   Line: 4
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 360.


 



  


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/python3.12/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 382, in parse_block_sequence_entry
    if self.check_token(BlockEntryToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 115, in check_token
    while self.need_more_tokens():
          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 152, in need_more_tokens
    self.stale_possible_simple_keys()
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 291, in stale_possible_simple_keys
    raise ScannerError("while scanning a simple key", key.mark,
yaml.scanner.ScannerError: while scanning a simple key
  in "<unicode string>", line 4, column 1:
    invalid
    ^
could not find expected ':'
  in "<unicode string>", line 5, column 1:
    
    ^
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2


 



  


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/python3.12/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 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 82, in compose_node
    node = self.compose_sequence_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 110, in compose_sequence_node
    while not self.check_event(SequenceEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 382, in parse_block_sequence_entry
    if self.check_token(BlockEntryToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 115, in check_token
    while self.need_more_tokens():
          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 152, in need_more_tokens
    self.stale_possible_simple_keys()
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 291, in stale_possible_simple_keys
    raise ScannerError("while scanning a simple key", key.mark,
yaml.scanner.ScannerError: while scanning a simple key
  in "<unicode string>", line 4, column 1:
    invalid
    ^
could not find expected ':'
  in "<unicode string>", line 5, 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/python3.12/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 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 82, in compose_node
    node = self.compose_sequence_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 110, in compose_sequence_node
    while not self.check_event(SequenceEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 382, in parse_block_sequence_entry
    if self.check_token(BlockEntryToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 115, in check_token
    while self.need_more_tokens():
          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 152, in need_more_tokens
    self.stale_possible_simple_keys()
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 291, in stale_possible_simple_keys
    raise ScannerError("while scanning a simple key", key.mark,
yaml.scanner.ScannerError: while scanning a simple key
  in "<unicode string>", line 4, column 1:
    invalid
    ^
could not find expected ':'
  in "<unicode string>", line 5, column 1:
    
    ^


 



  


py-ruamel-event

 invalid_correct 
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 535, in parse_block_sequence_entry
    if self.scanner.check_token(BlockEntryToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 169, in check_token
    while self.need_more_tokens():
          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 203, in need_more_tokens
    self.stale_possible_simple_keys()
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 348, in stale_possible_simple_keys
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning a simple key
  in "<unicode string>", line 4, column 1:
    invalid
    ^ (line: 4)
could not find expected ':'
  in "<unicode string>", line 5, column 1:
    
    ^ (line: 5)
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2


 



  


py-ruamel-json

 invalid_correct 
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 211, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 128, in compose_node
    node = self.compose_sequence_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 172, in compose_sequence_node
    while not self.parser.check_event(SequenceEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 535, in parse_block_sequence_entry
    if self.scanner.check_token(BlockEntryToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 169, in check_token
    while self.need_more_tokens():
          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 203, in need_more_tokens
    self.stale_possible_simple_keys()
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 348, in stale_possible_simple_keys
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning a simple key
  in "<unicode string>", line 4, column 1:
    invalid
    ^ (line: 4)
could not find expected ':'
  in "<unicode string>", line 5, column 1:
    
    ^ (line: 5)


 



  


py-ruamel-py

 invalid_correct 
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 211, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 128, in compose_node
    node = self.compose_sequence_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 172, in compose_sequence_node
    while not self.parser.check_event(SequenceEndEvent):
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 535, in parse_block_sequence_entry
    if self.scanner.check_token(BlockEntryToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 169, in check_token
    while self.need_more_tokens():
          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 203, in need_more_tokens
    self.stale_possible_simple_keys()
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 348, in stale_possible_simple_keys
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning a simple key
  in "<unicode string>", line 4, column 1:
    invalid
    ^ (line: 4)
could not find expected ':'
  in "<unicode string>", line 5, column 1:
    
    ^ (line: 5)


 



  


ruby-psych-json

 invalid_correct 
/ruby/gems/psych/lib/psych.rb:458:in `parse': (<unknown>): could not find expected ':' while scanning a simple key at line 4 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

 invalid_correct 
Error: ScanError { mark: Marker { index: 23, line: 4, col: 0 }, info: "while parsing a block mapping, did not find expected key" }
+STR
+DOC
+MAP
=VAL :key
+SEQ
=VAL :item1
=VAL :item2
-SEQ