# YAML Test Matrix

--- &test-Y79Y:009
  Title: Tabs in various contexts
  Tags: [ whitespace ]

YAML

? key:
:	key:

Expected Events

+STR
+DOC
+SEQ
+SEQ []

Expected JSON



cpp-rapidyaml-event

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

dotnet-yamldotnet-event

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

dotnet-yamldotnet-json

 invalid_incorrect
{? {"key": null} : {"key": null}}

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 =SYNX|?
   1    1    1    1 =DENT|.
   1    2    2    2 +NODE|
   1    2    2    2 +MAP |
   1    2    2    2 +PAIR|
   1    2    2    2 +NODE|
   1    2    2    2 +VAL |
   1    2    2    2 =TEXT|key
   1    5    5    5 -VAL |
   1    5    5    5 -NODE|
   1    5    5    5 =SYNX|:
   1    6    6    6 +NODE|
   1    6    6    6 +VAL |
   1    6    6    6 -VAL |
   1    6    6    6 -NODE|
   1    6    6    6 =EOL |\x0a
   2    0    7    7 -PAIR|
   2    0    7    7 -MAP |
   2    0    7    7 -NODE|
   2    0    7    7 =SYNX|:
   2    1    8    8 =WSPC|\x09
   2    2    9    9 +NODE|
   2    2    9    9 +VAL |
   2    2    9    9 =TEXT|key
   2    5   12   12 -VAL |
   2    5   12   12 -NODE|
   2    5   12   12 =ERR |Expected.start.of.line
   2    5   12   12 =REST|:
   2    6   13   13 =REST|\x0a
   3    0   14   14 -PAIR|
   3    0   14   14 -MAP |
   3    0   14   14 -NODE|
   3    0   14   14 -DOC |

nim-nimyaml-event

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

perl-yaml-json

 invalid_incorrect
{
   "key:" : "key:"
}

perl-yaml-perl

 invalid_incorrect
{
  'key:' => 'key:'
}

rust-yamlrust-event

 invalid_incorrect
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP
+MAP
=VAL :\tkey
=VAL :
-MAP
-MAP
-DOC
-STR

c-libfyaml-event

 invalid_correct
stdin:2:6: error: Indentation used tabs for ':' indicator
:       key:
           ^
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP

c-libfyaml-json

 invalid_correct
stdin:2:6: error: Indentation used tabs for ':' indicator
:       key:
           ^

c-libyaml-event

 invalid_correct
Parse error: found character that cannot start any token
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP

cpp-yamlcpp-event

 invalid_correct
Exception:
yaml-cpp: error at line 2, column 6: illegal map value
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP
=VAL :key

go-yaml-json

 invalid_correct
yaml: line 2: found character that cannot start any token

hs-hsyaml-event

 invalid_correct
Parsing error near byte offset Pos {posByteOffset = 12, posCharOffset = 12, posLine = 2, posColumn = 5} (Expected start of line)
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP
=VAL :key

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: bad indentation of a mapping entry (2:6)

 1 | ? key:
 2 | :→key:
----------^
    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:1182:7)
    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: 'bad indentation of a mapping entry',
  mark: {
    name: null,
    buffer: '? key:\n:\tkey:\n',
    position: 12,
    line: 1,
    column: 5,
    snippet: ' 1 | ? key:\n 2 | :→key:\n----------^'
  }
}

Node.js v20.13.1

js-yaml-event

 invalid_correct
Tabs are not allowed as indentation at line 2, column 2:

:	key:
 ^
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP

js-yaml-json

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

YAMLParseError: Tabs are not allowed as indentation at line 2, column 2:

:	key:
 ^

    at Composer.onError (/node/node_modules/yaml/dist/compose/composer.js:69:34)
    at Object.resolveProps (/node/node_modules/yaml/dist/compose/resolve-props.js:135:9)
    at Object.resolveBlockMap (/node/node_modules/yaml/dist/compose/resolve-block-map.js:64:41)
    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: 'TAB_AS_INDENT',
  pos: [ 8, 9 ],
  linePos: [ { line: 2, col: 2 }, { line: 2, col: 3 } ]
}

Node.js v20.13.1

lua-lyaml-json

 invalid_correct
luajit: 2:1: found character that cannot start any token
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: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 0x55bc0669ded0

perl-pp-event

 invalid_correct
Line      : 2
Column    : 7
Message   : Tabs can not be used for indentation
Where     : /perl5/lib/perl5/YAML/PP/Lexer.pm line 289
YAML      : ""
  at /yaml/bin/perl-pp-event line 46.
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP

perl-pp-json

 invalid_correct
Line      : 2
Column    : 7
Message   : Tabs can not be used for indentation
Where     : /perl5/lib/perl5/YAML/PP/Lexer.pm line 289
YAML      : ""
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pp-perl

 invalid_correct
Line      : 2
Column    : 7
Message   : Tabs can not be used for indentation
Where     : /perl5/lib/perl5/YAML/PP/Lexer.pm line 289
YAML      : ""
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.

perl-pplibyaml-json

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

    found character that cannot start any token

was found at , line: 2, column: 2
while scanning for the next token at line: 2, column: 2

perl-pplibyaml-perl

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

    found character that cannot start any token

was found at , line: 2, column: 2
while scanning for the next token at line: 2, column: 2

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 2, column 5): 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 5): 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 ':	key:' at /yaml/bin/perl-tiny-json line 12.

perl-tiny-perl

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

perl-xs-json

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

    found character that cannot start any token

was found at document: 1, line: 2, column: 2
while scanning for the next token at line: 2, column: 2

perl-xs-perl

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

    found character that cannot start any token

was found at document: 1, line: 2, column: 2
while scanning for the next token at line: 2, column: 2

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 449, in parse_block_mapping_value
    if not self.check_token(KeyToken, ValueToken, BlockEndToken):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 258, in fetch_more_tokens
    raise ScannerError("while scanning for the next token", None,
yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 2, column 2:
    :	key:
     ^
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP

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 64, in compose_node
    if self.check_event(AliasEvent):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 449, in parse_block_mapping_value
    if not self.check_token(KeyToken, ValueToken, BlockEndToken):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 258, in fetch_more_tokens
    raise ScannerError("while scanning for the next token", None,
yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 2, column 2:
    :	key:
     ^

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 64, in compose_node
    if self.check_event(AliasEvent):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 449, in parse_block_mapping_value
    if not self.check_token(KeyToken, ValueToken, BlockEndToken):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 258, in fetch_more_tokens
    raise ScannerError("while scanning for the next token", None,
yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 2, column 2:
    :	key:
     ^

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 631, in parse_block_mapping_value
    if self.scanner.check_token(ValueToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 313, in fetch_more_tokens
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 2, column 2:
    :	key:
     ^ (line: 2)
+STR
+DOC
+MAP
+MAP
=VAL :key
=VAL :
-MAP

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 106, in compose_node
    if self.parser.check_event(AliasEvent):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 631, in parse_block_mapping_value
    if self.scanner.check_token(ValueToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 313, in fetch_more_tokens
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 2, column 2:
    :	key:
     ^ (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 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 106, in compose_node
    if self.parser.check_event(AliasEvent):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 631, in parse_block_mapping_value
    if self.scanner.check_token(ValueToken):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 313, in fetch_more_tokens
    raise ScannerError(
ruamel.yaml.scanner.ScannerError: while scanning for the next token
found character '\t' that cannot start any token
  in "<unicode string>", line 2, column 2:
    :	key:
     ^ (line: 2)

ruby-psych-json

 invalid_correct
/ruby/gems/psych/lib/psych.rb:458:in `parse': (<unknown>): found character that cannot start any token while scanning for the next token at line 2 column 2 (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>'