# YAML Test Matrix

--- &test-H7TQ
  Title: Extra words on %YAML directive
  Tags: [ directive ]

YAML

%YAML 1.2 foo
---

Expected Events

+STR

Expected JSON



cpp-rapidyaml-event

 invalid_incorrect
+STR
+DOC ---
=VAL :
-DOC
-STR

hs-reference-yeast

 invalid_incorrect
Line  Col Char Byte Token|Content
   1    0    0    0 +DOC |
   1    0    0    0 +DIR |
   1    0    0    0 =SYNX|%
   1    1    1    1 =META|YAML
   1    5    5    5 =WSPC|.
   1    6    6    6 =META|1.2
   1    9    9    9 -DIR |
   1    9    9    9 =ERR |Expected.start.of.line
   1    9    9    9 =REST|.foo
   1   13   13   13 =REST|\x0a
   2    0   14   14 -DOC |
   2    0   14   14 +DOC |
   2    0   14   14 =HEAD|---
   2    3   17   17 +NODE|
   2    3   17   17 +VAL |
   2    3   17   17 -VAL |
   2    3   17   17 -NODE|
   2    3   17   17 =EOL |\x0a
   3    0   18   18 -DOC |

perl-syck-json

 invalid_incorrect
"%YAML 1.2 foo ---"

perl-syck-perl

 invalid_incorrect
'%YAML 1.2 foo ---'

perl-tiny-json

 invalid_incorrect
null

perl-tiny-perl

 invalid_incorrect
undef

c-libfyaml-event

 invalid_correct
stdin:1:11: error: garbage after version directive
%YAML 1.2 foo
          ^
+STR

c-libfyaml-json

 invalid_correct
stdin:1:11: error: garbage after version directive
%YAML 1.2 foo
          ^

c-libyaml-event

 invalid_correct
Parse error: did not find expected comment or line break
+STR

cpp-yamlcpp-event

 invalid_correct
Exception:
yaml-cpp: error at line 1, column 1: YAML directives must have exactly one argument
+STR

dotnet-yamldotnet-event

 invalid_correct
Unhandled exception. YamlDotNet.Core.SyntaxErrorException: (Line: 1, Col: 1, Idx: 0) - (Line: 1, Col: 11, Idx: 10): While scanning a directive, did not find expected comment or line break.
   at YamlDotNet.Core.Scanner.ScanDirective()
   at YamlDotNet.Core.Scanner.FetchDirective()
   at YamlDotNet.Core.Scanner.FetchNextToken()
   at YamlDotNet.Core.Scanner.FetchMoreTokens()
   at YamlDotNet.Core.Scanner.MoveNextWithoutConsuming()
   at YamlDotNet.Core.Parser.GetCurrentToken()
   at YamlDotNet.Core.Parser.ParseDocumentStart(Boolean isImplicit)
   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

dotnet-yamldotnet-json

 invalid_correct
Unhandled exception. YamlDotNet.Core.SyntaxErrorException: (Line: 1, Col: 1, Idx: 0) - (Line: 1, Col: 11, Idx: 10): While scanning a directive, did not find expected comment or line break.
   at YamlDotNet.Core.Scanner.ScanDirective()
   at YamlDotNet.Core.Scanner.FetchDirective()
   at YamlDotNet.Core.Scanner.FetchNextToken()
   at YamlDotNet.Core.Scanner.FetchMoreTokens()
   at YamlDotNet.Core.Scanner.MoveNextWithoutConsuming()
   at YamlDotNet.Core.Parser.GetCurrentToken()
   at YamlDotNet.Core.Parser.ParseDocumentStart(Boolean isImplicit)
   at YamlDotNet.Core.Parser.StateMachine()
   at YamlDotNet.Core.Parser.MoveNext()
   at YamlDotNet.Core.ParserExtensions.TryConsume[T](IParser parser, T& event)
   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: did not find expected comment or line break

hs-hsyaml-event

 invalid_correct
Parsing error near byte offset Pos {posByteOffset = 9, posCharOffset = 9, posLine = 1, posColumn = 9} (Expected start of line)
+STR
+DOC

hs-hsyaml-json

 invalid_correct
hsyaml-parser: user error (Expected start of line)

js-jsyaml-json

 invalid_correct
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: YAML directive accepts exactly one argument (2:1)

 1 | %YAML 1.2 foo
 2 | ---
-----^
    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 Object.handleYamlDirective [as YAML] (/node/node_modules/js-yaml/lib/loader.js:208:7)
    at readDocument (/node/node_modules/js-yaml/lib/loader.js:1606:39)
    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)
    at Module.load (node:internal/modules/cjs/loader:1208:32) {
  reason: 'YAML directive accepts exactly one argument',
  mark: {
    name: null,
    buffer: '%YAML 1.2 foo\n---\n',
    position: 14,
    line: 1,
    column: 0,
    snippet: ' 1 | %YAML 1.2 foo\n 2 | ---\n-----^'
  }
}

Node.js v20.13.1

js-yaml-event

 invalid_correct
%YAML directive should contain exactly one part at line 1, column 1:

%YAML 1.2 foo
^^^^^^^^^^^^^
+STR

js-yaml-json

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

YAMLParseError: %YAML directive should contain exactly one part at line 1, column 1:

%YAML 1.2 foo
^^^^^^^^^^^^^

    at Composer.onError (/node/node_modules/yaml/dist/compose/composer.js:69:34)
    at /node/node_modules/yaml/dist/compose/composer.js:143:26
    at Directives.add (/node/node_modules/yaml/dist/doc/directives.js:79:21)
    at Composer.next (/node/node_modules/yaml/dist/compose/composer.js:140:33)
    at next (<anonymous>)
    at Composer.compose (/node/node_modules/yaml/dist/compose/composer.js:131:25)
    at compose.next (<anonymous>)
    at Function.from (<anonymous>)
    at Object.parseAllDocuments (/node/node_modules/yaml/dist/public-api.js:28:24)
    at Object.<anonymous> (/yaml/bin/js-yaml-json:7:19) {
  code: 'BAD_DIRECTIVE',
  pos: [ 0, 13 ],
  linePos: [ { line: 1, col: 1 }, { line: 1, col: 14 } ]
}

Node.js v20.13.1

lua-lyaml-json

 invalid_correct
luajit: 1:1: did not find expected comment or line break
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:496: in function 'load'
	/yaml/bin/lua-lyaml-json:6: in main chunk
	[C]: at 0x55b2d25d8ed0

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 character (expected line end): "f" [YamlStreamError]
+STR

perl-pp-event

 invalid_correct
Line      : 1
Column    : 10
Expected  : EOL WS
Got       : Invalid directive
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : " foo"
  at /yaml/bin/perl-pp-event line 46.
+STR

perl-pp-json

 invalid_correct
Line      : 1
Column    : 10
Expected  : EOL WS
Got       : Invalid directive
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : " foo"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pp-perl

 invalid_correct
Line      : 1
Column    : 10
Expected  : EOL WS
Got       : Invalid directive
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : " foo"
  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 comment or line break

was found at , line: 1, column: 11
while scanning a directive at line: 1, column: 1

perl-pplibyaml-perl

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

    did not find expected comment or line break

was found at , line: 1, column: 11
while scanning a directive 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-xs-json

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

    did not find expected comment or line break

was found at document: 1, line: 1, column: 11
while scanning a directive at line: 1, column: 1

perl-xs-perl

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

    did not find expected comment or line break

was found at document: 1, line: 1, column: 11
while scanning a directive at line: 1, column: 1

perl-yaml-json

 invalid_correct
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

 invalid_correct
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

 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 142, in parse_implicit_document_start
    if not self.check_token(DirectiveToken, DocumentStartToken,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 116, in check_token
    self.fetch_more_tokens()
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 177, in fetch_more_tokens
    return self.fetch_directive()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 400, in fetch_directive
    self.tokens.append(self.scan_directive())
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 803, in scan_directive
    self.scan_directive_ignored_line(start_mark)
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 894, in scan_directive_ignored_line
    raise ScannerError("while scanning a directive", start_mark,
yaml.scanner.ScannerError: while scanning a directive
  in "<unicode string>", line 1, column 1:
    %YAML 1.2 foo
    ^
expected a comment or a line break, but found 'f'
  in "<unicode string>", line 1, column 11:
    %YAML 1.2 foo
              ^
+STR

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 129, in load_all
    while loader.check_data():
          ^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/constructor.py", line 32, in check_data
    return self.check_node()
           ^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 22, in check_node
    return not self.check_event(StreamEndEvent)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 142, in parse_implicit_document_start
    if not self.check_token(DirectiveToken, DocumentStartToken,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 116, in check_token
    self.fetch_more_tokens()
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 177, in fetch_more_tokens
    return self.fetch_directive()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 400, in fetch_directive
    self.tokens.append(self.scan_directive())
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 803, in scan_directive
    self.scan_directive_ignored_line(start_mark)
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 894, in scan_directive_ignored_line
    raise ScannerError("while scanning a directive", start_mark,
yaml.scanner.ScannerError: while scanning a directive
  in "<unicode string>", line 1, column 1:
    %YAML 1.2 foo
    ^
expected a comment or a line break, but found 'f'
  in "<unicode string>", line 1, column 11:
    %YAML 1.2 foo
              ^

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 129, in load_all
    while loader.check_data():
          ^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/constructor.py", line 32, in check_data
    return self.check_node()
           ^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/composer.py", line 22, in check_node
    return not self.check_event(StreamEndEvent)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 142, in parse_implicit_document_start
    if not self.check_token(DirectiveToken, DocumentStartToken,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 116, in check_token
    self.fetch_more_tokens()
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 177, in fetch_more_tokens
    return self.fetch_directive()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 400, in fetch_directive
    self.tokens.append(self.scan_directive())
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 803, in scan_directive
    self.scan_directive_ignored_line(start_mark)
  File "/python/lib/python3.12/site-packages/yaml/scanner.py", line 894, in scan_directive_ignored_line
    raise ScannerError("while scanning a directive", start_mark,
yaml.scanner.ScannerError: while scanning a directive
  in "<unicode string>", line 1, column 1:
    %YAML 1.2 foo
    ^
expected a comment or a line break, but found 'f'
  in "<unicode string>", line 1, column 11:
    %YAML 1.2 foo
              ^

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 187, in parse_implicit_document_start
    if not self.scanner.check_token(DirectiveToken, DocumentStartToken, StreamEndToken):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 170, in check_token
    self.fetch_more_tokens()
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 232, in fetch_more_tokens
    return self.fetch_directive()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 461, in fetch_directive
    self.tokens.append(self.scan_directive())
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 862, in scan_directive
    self.scan_directive_ignored_line(start_mark)
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 989, in scan_directive_ignored_line
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning a directive
  in "<unicode string>", line 1, column 1:
    %YAML 1.2 foo
    ^ (line: 1)
expected a comment or a line break, but found 'f'
  in "<unicode string>", line 1, column 11:
    %YAML 1.2 foo
              ^ (line: 1)
+STR

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 475, in load_all
    while constructor.check_data():
          ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/constructor.py", line 105, in check_data
    return self.composer.check_node()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 58, in check_node
    return not self.parser.check_event(StreamEndEvent)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 187, in parse_implicit_document_start
    if not self.scanner.check_token(DirectiveToken, DocumentStartToken, StreamEndToken):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 170, in check_token
    self.fetch_more_tokens()
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 232, in fetch_more_tokens
    return self.fetch_directive()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 461, in fetch_directive
    self.tokens.append(self.scan_directive())
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 862, in scan_directive
    self.scan_directive_ignored_line(start_mark)
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 989, in scan_directive_ignored_line
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning a directive
  in "<unicode string>", line 1, column 1:
    %YAML 1.2 foo
    ^ (line: 1)
expected a comment or a line break, but found 'f'
  in "<unicode string>", line 1, column 11:
    %YAML 1.2 foo
              ^ (line: 1)

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 475, in load_all
    while constructor.check_data():
          ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/constructor.py", line 105, in check_data
    return self.composer.check_node()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/composer.py", line 58, in check_node
    return not self.parser.check_event(StreamEndEvent)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 187, in parse_implicit_document_start
    if not self.scanner.check_token(DirectiveToken, DocumentStartToken, StreamEndToken):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 170, in check_token
    self.fetch_more_tokens()
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 232, in fetch_more_tokens
    return self.fetch_directive()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 461, in fetch_directive
    self.tokens.append(self.scan_directive())
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 862, in scan_directive
    self.scan_directive_ignored_line(start_mark)
  File "/python/lib/python3.12/site-packages/ruamel/yaml/scanner.py", line 989, in scan_directive_ignored_line
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning a directive
  in "<unicode string>", line 1, column 1:
    %YAML 1.2 foo
    ^ (line: 1)
expected a comment or a line break, but found 'f'
  in "<unicode string>", line 1, column 11:
    %YAML 1.2 foo
              ^ (line: 1)

ruby-psych-json

 invalid_correct
/ruby/gems/psych/lib/psych.rb:458:in `parse': (<unknown>): did not find expected comment or line break while scanning a directive 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: 0, line: 1, col: 0 }, info: "while scanning a directive, did not find expected comment or line break" }
+STR