# YAML Test Matrix

--- &test-SR86
  Title: Anchor plus Alias
  Tags: [ alias, error ]

YAML

key1: &a value
key2: &b *a

Expected Events

+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2

Expected JSON



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|key1
   1    4    4    4 -VAL |
   1    4    4    4 -NODE|
   1    4    4    4 =SYNX|:
   1    5    5    5 =WSPC|.
   1    6    6    6 +NODE|
   1    6    6    6 +PROP|
   1    6    6    6 +ANCH|
   1    6    6    6 =SYNX|&
   1    7    7    7 =META|a
   1    8    8    8 -ANCH|
   1    8    8    8 -PROP|
   1    8    8    8 =WSPC|.
   1    9    9    9 +VAL |
   1    9    9    9 =TEXT|value
   1   14   14   14 -VAL |
   1   14   14   14 -NODE|
   1   14   14   14 =EOL |\x0a
   2    0   15   15 -PAIR|
   2    0   15   15 +PAIR|
   2    0   15   15 +NODE|
   2    0   15   15 +VAL |
   2    0   15   15 =TEXT|key2
   2    4   19   19 -VAL |
   2    4   19   19 -NODE|
   2    4   19   19 =SYNX|:
   2    5   20   20 +NODE|
   2    5   20   20 +VAL |
   2    5   20   20 -VAL |
   2    5   20   20 -NODE|
   2    5   20   20 =REST|.&b.*a
   2   11   26   26 =REST|\x0a
   3    0   27   27 -PAIR|
   3    0   27   27 -MAP |
   3    0   27   27 -NODE|
   3    0   27   27 -DOC |

perl-syck-json

 invalid_incorrect
{
   "key1" : "value",
   "key2" : "value"
}

perl-syck-perl

 invalid_incorrect
{
  'key1' => 'value',
  'key2' => 'value'
}

c-libfyaml-event

 invalid_correct
stdin:2:11: error: unexpected alias
key2: &b *a
          ^
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2

c-libfyaml-json

 invalid_correct
stdin:2:11: error: unexpected alias
key2: &b *a
          ^

c-libyaml-event

 invalid_correct
Parse error: did not find expected key
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2
=VAL &b :

cpp-rapidyaml-event

 invalid_correct
/tmp/rapidyaml-0.4.0-src/src/c4/yml/parse.cpp:3018:check failed: !m_tree->has_val_anchor(node_id)
Aborted (core dumped)

cpp-yamlcpp-event

 invalid_correct
Exception:
yaml-cpp: error at line 2, column 10: end of map not found
+STR
+DOC
+MAP
=VAL :key1
=VAL &1 :value
=VAL :key2
=VAL &2 :

dotnet-yamldotnet-event

 invalid_correct
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 2, Col: 10, Idx: 24) - (Line: 2, Col: 12, Idx: 26): While parsing a node, did not find expected token.
   at YamlDotNet.Core.Parser.ParseNode(Boolean isBlock, Boolean isIndentlessSequence)
   at YamlDotNet.Core.Parser.ParseBlockMappingValue()
   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 :key1
=VAL &a :value
=VAL :key2

dotnet-yamldotnet-json

 invalid_correct
Unhandled exception. YamlDotNet.Core.SemanticErrorException: (Line: 2, Col: 10, Idx: 24) - (Line: 2, Col: 12, Idx: 26): While parsing a node, did not find expected token.
   at YamlDotNet.Core.Parser.ParseNode(Boolean isBlock, Boolean isIndentlessSequence)
   at YamlDotNet.Core.Parser.ParseBlockMappingValue()
   at YamlDotNet.Core.Parser.StateMachine()
   at YamlDotNet.Core.Parser.MoveNext()
   at YamlDotNet.Core.ParserExtensions.TryConsume[T](IParser parser, T& event)
   at YamlDotNet.Serialization.NodeDeserializers.ScalarNodeDeserializer.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 1: did not find expected key

hs-hsyaml-event

 invalid_correct
Parsing error near byte offset Pos {posByteOffset = 20, posCharOffset = 20, posLine = 2, posColumn = 5} (Lexical error near " &b *a")
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2
=VAL :

hs-hsyaml-json

 invalid_correct
hsyaml-parser: user error (Lexical error near " &b *a")

js-jsyaml-json

 invalid_correct
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: alias node should not have any properties (3:1)

 1 | key1: &a value
 2 | key2: &b *a
 3 | 
-----^
    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 composeNode (/node/node_modules/js-yaml/lib/loader.js:1454:13)
    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)
    at Module._compile (node:internal/modules/cjs/loader:1358:14) {
  reason: 'alias node should not have any properties',
  mark: {
    name: null,
    buffer: 'key1: &a value\nkey2: &b *a\n',
    position: 27,
    line: 2,
    column: 0,
    snippet: ' 1 | key1: &a value\n 2 | key2: &b *a\n 3 | \n-----^'
  }
}

Node.js v20.13.1

js-yaml-event

 invalid_correct
An alias node must not specify any properties at line 2, column 10:

key2: &b *a
         ^^
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2

js-yaml-json

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

YAMLParseError: An alias node must not specify any properties at line 2, column 10:

key2: &b *a
         ^^

    at Composer.onError (/node/node_modules/yaml/dist/compose/composer.js:69:34)
    at composeNode (/node/node_modules/yaml/dist/compose/compose-node.js:18:17)
    at Object.resolveBlockMap (/node/node_modules/yaml/dist/compose/resolve-block-map.js:83:19)
    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) {
  code: 'ALIAS_PROPS',
  pos: [ 24, 26 ],
  linePos: [ { line: 2, col: 10 }, { line: 2, col: 12 } ]
}

Node.js v20.13.1

lua-lyaml-json

 invalid_correct
luajit: 2:7: did not find expected key
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 0x563313c64ed0

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: Alias may not have node properties [YamlStreamError]
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2

perl-pp-event

 invalid_correct
Line      : 2
Column    : 12
Message   : Parse error: Alias not allowed in this context
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 731
YAML      : ""
  at /yaml/bin/perl-pp-event line 46.
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2

perl-pp-json

 invalid_correct
Line      : 2
Column    : 12
Message   : Parse error: Alias not allowed in this context
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 731
YAML      : ""
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pp-perl

 invalid_correct
Line      : 2
Column    : 12
Message   : Parse error: Alias not allowed in this context
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 731
YAML      : ""
  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 key

was found at , line: 2, column: 10
while parsing a block mapping at line: 1, column: 1

perl-pplibyaml-perl

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

    did not find expected key

was found at , line: 2, column: 10
while parsing a block mapping at line: 1, 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-tiny-json

 invalid_correct
YAML::Tiny does not support a feature in line '&a value' at /yaml/bin/perl-tiny-json line 12.

perl-tiny-perl

 invalid_correct
YAML::Tiny does not support a feature in line '&a value' at /yaml/bin/perl-tiny-perl line 15.

perl-xs-json

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

    did not find expected key

was found at document: 1, line: 2, column: 10
while parsing a block mapping at line: 1, column: 1

perl-xs-perl

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

    did not find expected key

was found at document: 1, line: 2, column: 10
while parsing a block mapping at line: 1, column: 1

perl-yaml-json

 invalid_correct
YAML Error: Can't define both an anchor and an alias
   Code: YAML_PARSE_ERR_ANCHOR_ALIAS
   Line: 2
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 249.

perl-yaml-perl

 invalid_correct
YAML Error: Can't define both an anchor and an alias
   Code: YAML_PARSE_ERR_ANCHOR_ALIAS
   Line: 2
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 249.

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 438, in parse_block_mapping_key
    raise ParserError("while parsing a block mapping", self.marks[-1],
yaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 1, column 1:
    key1: &a value
    ^
expected <block end>, but found '<alias>'
  in "<unicode string>", line 2, column 10:
    key2: &b *a
             ^
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2
=VAL &b :

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 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 438, in parse_block_mapping_key
    raise ParserError("while parsing a block mapping", self.marks[-1],
yaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 1, column 1:
    key1: &a value
    ^
expected <block end>, but found '<alias>'
  in "<unicode string>", line 2, column 10:
    key2: &b *a
             ^

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 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 438, in parse_block_mapping_key
    raise ParserError("while parsing a block mapping", self.marks[-1],
yaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 1, column 1:
    key1: &a value
    ^
expected <block end>, but found '<alias>'
  in "<unicode string>", line 2, column 10:
    key2: &b *a
             ^

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 614, in parse_block_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 1, column 1:
    key1: &a value
    ^ (line: 1)
expected <block end>, but found '<alias>'
  in "<unicode string>", line 2, column 10:
    key2: &b *a
             ^ (line: 2)
+STR
+DOC
+MAP
=VAL :key1
=VAL &a :value
=VAL :key2
=VAL &b :

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 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 614, in parse_block_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 1, column 1:
    key1: &a value
    ^ (line: 1)
expected <block end>, but found '<alias>'
  in "<unicode string>", line 2, column 10:
    key2: &b *a
             ^ (line: 2)

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 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 614, in parse_block_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 1, column 1:
    key1: &a value
    ^ (line: 1)
expected <block end>, but found '<alias>'
  in "<unicode string>", line 2, column 10:
    key2: &b *a
             ^ (line: 2)

ruby-psych-json

 invalid_correct
/ruby/gems/psych/lib/psych.rb:458:in `parse': (<unknown>): did not find expected key while parsing a block 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

 invalid_correct
Error: ScanError { mark: Marker { index: 24, line: 2, col: 9 }, info: "while parsing a block mapping, did not find expected key" }
+STR
+DOC
+MAP
=VAL :key1
=VAL &1 :value
=VAL :key2
=VAL &2 :