Fuzz introspector: fuzz_parse
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
111 432 lark.utils.bfs call site: {node_id} lark.load_grammar.GrammarBuilder._define
91 85 lark.lark.Lark._prepare_callbacks call site: {node_id} lark.parse_tree_builder.ParseTreeBuilder._init_builders
45 274 lark.common.ParserConf.__init__ call site: {node_id} lark.visitors.Transformer_InPlace.transform
37 359 lark.reconstruct.WriteTokensTransformer.__default__ call site: {node_id} lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__
32 397 lark.visitors.Transformer_InPlace.transform call site: {node_id} lark.load_grammar.GrammarBuilder.load_grammar
30 185 lark.parse_tree_builder.ParseTreeBuilder.create_callback call site: {node_id} lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__
28 320 lark.reconstruct.WriteTokensTransformer.__default__ call site: {node_id} lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__
25 59 lark.utils._deserialize call site: {node_id} lark.lark.Lark._prepare_callbacks
23 30 lark.utils.FS.open call site: {node_id} lark.lark.Lark._load
22 241 lark.lark.Lark.__init__ call site: {node_id} lark.load_grammar.GrammarBuilder.load_grammar
16 582 lark.lexer._check_regex_collisions call site: {node_id} lark.lark.Lark.save
15 14 lark.lark.Lark.__init__ call site: {node_id} lark.utils.isascii

Fuzzer calltree

0 ...fuzz_parse.TestOneInput [function] [call site] 00000
1 atheris.FuzzedDataProvider [function] [call site] 00001
1 fdp.ConsumeIntInRange [function] [call site] 00002
1 fdp.ConsumeUnicodeNoSurrogates [function] [call site] 00003
1 fdp.ConsumeIntInRange [function] [call site] 00004
1 fdp.ConsumeUnicodeNoSurrogates [function] [call site] 00005
1 lark.lark.Lark.__init__ [function] [call site] 00006
2 lark.lark.LarkOptions.__init__ [function] [call site] 00007
3 .dict [function] [call site] 00008
3 o.pop [function] [call site] 00009
3 .isinstance [function] [call site] 00010
3 .bool [function] [call site] 00011
3 .isinstance [function] [call site] 00012
3 lark.exceptions.assert_config [function] [call site] 00013
2 .isinstance [function] [call site] 00014
2 lark.utils.isascii [function] [call site] 00015
3 s.isascii [function] [call site] 00016
3 s.encode [function] [call site] 00017
2 .str [function] [call site] 00018
2 options.items [function] [call site] 00019
2 .str [function] [call site] 00020
2 lark.load_grammar.sha256_digest [function] [call site] 00021
3 s.encode [function] [call site] 00022
3 hashlib.sha256 [function] [call site] 00023
3 s.encode [function] [call site] 00024
3 hashlib.sha256 [function] [call site] 00025
2 .isinstance [function] [call site] 00026
2 getpass.getuser [function] [call site] 00027
2 tempfile.gettempdir [function] [call site] 00028
2 lark.utils.FS.open [function] [call site] 00029
3 atomicwrites.atomic_write [function] [call site] 00030
3 lark.utils.FS.open [function] [call site] 00031
2 logger.debug [function] [call site] 00032
2 .set [function] [call site] 00033
2 f.readline [function] [call site] 00034
2 pickle.load [function] [call site] 00035
2 cache_sha256.encode [function] [call site] 00036
2 lark.load_grammar.verify_used_files [function] [call site] 00037
3 file_hashes.items [function] [call site] 00038
3 .isinstance [function] [call site] 00039
3 os.path.exists [function] [call site] 00040
3 .open [function] [call site] 00041
3 f.read [function] [call site] 00042
3 .isinstance [function] [call site] 00043
3 contextlib.suppress [function] [call site] 00044
3 pkgutil.get_data [function] [call site] 00045
3 lark.load_grammar.sha256_digest [function] [call site] 00046
3 logger.info [function] [call site] 00047
2 pickle.load [function] [call site] 00048
2 lark.lark.Lark._load [function] [call site] 00049
3 .isinstance [function] [call site] 00050
3 pickle.load [function] [call site] 00051
3 lark.utils.SerializeMemoizer.deserialize [function] [call site] 00052
4 lark.utils._deserialize [function] [call site] 00053
5 .isinstance [function] [call site] 00054
5 class_.deserialize [function] [call site] 00055
5 lark.utils._deserialize [function] [call site] 00056
5 data.items [function] [call site] 00057
5 .isinstance [function] [call site] 00058
5 lark.utils._deserialize [function] [call site] 00059
3 .dict [function] [call site] 00060
3 .set [function] [call site] 00061
3 .set [function] [call site] 00062
3 options.update [function] [call site] 00063
3 lark.lark.LarkOptions.deserialize [function] [call site] 00064
4 lark.lark.LarkOptions.__init__ [function] [call site] 00065
3 lark.utils.SerializeMemoizer.deserialize [function] [call site] 00066
3 lark.lark.LarkOptions.deserialize [function] [call site] 00067
3 lark.utils.Serialize.deserialize [function] [call site] 00068
4 .getattr [function] [call site] 00069
4 .getattr [function] [call site] 00070
4 cls.__new__ [function] [call site] 00071
4 lark.utils._deserialize [function] [call site] 00072
4 .setattr [function] [call site] 00073
4 .hasattr [function] [call site] 00074
4 inst._deserialize [function] [call site] 00075
3 lark.parser_frontends._validate_frontend_args [function] [call site] 00076
4 lark.exceptions.assert_config [function] [call site] 00077
4 .isinstance [function] [call site] 00078
4 lark.exceptions.assert_config [function] [call site] 00079
3 lark.lark.Lark._deserialize_lexer_conf [function] [call site] 00080
4 lark.utils.SerializeMemoizer.deserialize [function] [call site] 00081
4 lark.lark.LarkOptions.deserialize [function] [call site] 00082
4 lark.utils.Serialize.deserialize [function] [call site] 00083
3 lark.lark.Lark._prepare_callbacks [function] [call site] 00084
4 lark.parse_tree_builder.ParseTreeBuilder.__init__ [function] [call site] 00085
5 lark.parse_tree_builder.ParseTreeBuilder._init_builders [function] [call site] 00086
6 lark.parse_tree_builder.make_propagate_positions [function] [call site] 00087
7 .callable [function] [call site] 00088
7 functools.partial.children.__name__ [function] [call site] 00089
7 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00090
7 lark.tree.Tree.__init__ [function] [call site] 00091
7 functools.partial.data.children.__name__ [function] [call site] 00092
7 lark.parse_tree_builder.PropagatePositions.__init__ [function] [call site] 00093
7 functools.partial.children.data.__name__ [function] [call site] 00094
7 lark.parse_tree_builder.AmbiguousExpander.__init__ [function] [call site] 00095
7 functools.partial.data.__name__ [function] [call site] 00096
7 functools.partial.__name__.data.children [function] [call site] 00097
7 functools.partial.__name__.children [function] [call site] 00098
7 functools.partial.data.__name__.children [function] [call site] 00099
7 functools.partial.__name__.children.data [function] [call site] 00100
7 functools.partial [function] [call site] 00101
7 copy.deepcopy.data [function] [call site] 00102
7 copy.deepcopy.data.__name__ [function] [call site] 00103
7 lark.parsers.earley_forest.TreeForestTransformer.__default__ [function] [call site] 00104
8 functools.partial.children.__name__ [function] [call site] 00105
8 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00106
8 lark.tree.Tree.__init__ [function] [call site] 00107
8 functools.partial.data.children.__name__ [function] [call site] 00108
8 lark.parse_tree_builder.PropagatePositions.__init__ [function] [call site] 00109
8 functools.partial.children.data.__name__ [function] [call site] 00110
8 lark.parse_tree_builder.AmbiguousExpander.__init__ [function] [call site] 00111
8 functools.partial.data.__name__ [function] [call site] 00112
8 functools.partial.__name__.data.children [function] [call site] 00113
8 functools.partial.__name__.children [function] [call site] 00114
8 functools.partial.data.__name__.children [function] [call site] 00115
8 functools.partial.__name__.children.data [function] [call site] 00116
8 functools.partial [function] [call site] 00117
8 copy.deepcopy.data [function] [call site] 00118
8 copy.deepcopy.data.__name__ [function] [call site] 00119
8 lark.parsers.earley_forest.TreeForestTransformer.__default__ [function] [call site] 00120
8 functools.partial.data.children [function] [call site] 00121
8 functools.partial.children.data [function] [call site] 00122
8 functools.partial.children.__name__.data [function] [call site] 00123
8 functools.partial.__name__ [function] [call site] 00124
8 lark.parse_tree_builder.ParseTreeBuilder.create_callback.default_callback [function] [call site] 00125
8 functools.partial.data [function] [call site] 00126
8 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00127
8 lark.parse_tree_builder.ChildFilterLALR_NoPlaceholders.__init__ [function] [call site] 00128
8 lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__ [function] [call site] 00129
9 .len [function] [call site] 00130
9 functools.partial.children.__name__ [function] [call site] 00131
9 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00132
9 lark.tree.Tree.__init__ [function] [call site] 00133
9 functools.partial.data.children.__name__ [function] [call site] 00134
9 lark.parse_tree_builder.PropagatePositions.__init__ [function] [call site] 00135
9 functools.partial.children.data.__name__ [function] [call site] 00136
9 lark.parse_tree_builder.AmbiguousExpander.__init__ [function] [call site] 00137
9 functools.partial.data.__name__ [function] [call site] 00138
9 functools.partial.__name__.data.children [function] [call site] 00139
9 functools.partial.__name__.children [function] [call site] 00140
9 functools.partial.data.__name__.children [function] [call site] 00141
9 functools.partial.__name__.children.data [function] [call site] 00142
9 functools.partial [function] [call site] 00143
9 copy.deepcopy.data [function] [call site] 00144
9 copy.deepcopy.data.__name__ [function] [call site] 00145
9 lark.parsers.earley_forest.TreeForestTransformer.__default__ [function] [call site] 00146
9 functools.partial.data.children [function] [call site] 00147
9 functools.partial.children.data [function] [call site] 00148
9 functools.partial.children.__name__.data [function] [call site] 00149
9 functools.partial.__name__ [function] [call site] 00150
9 lark.parse_tree_builder.ParseTreeBuilder.create_callback.default_callback [function] [call site] 00151
9 functools.partial.data [function] [call site] 00152
9 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00153
9 lark.parse_tree_builder.ChildFilterLALR_NoPlaceholders.__init__ [function] [call site] 00154
9 lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__ [function] [call site] 00155
9 copy.deepcopy.data.__name__.children [function] [call site] 00156
9 functools.partial.__name__.data [function] [call site] 00157
9 functools.partial.children [function] [call site] 00158
8 copy.deepcopy.data.__name__.children [function] [call site] 00159
8 functools.partial.__name__.data [function] [call site] 00160
8 functools.partial.children [function] [call site] 00161
7 functools.partial.data.children [function] [call site] 00162
7 functools.partial.children.data [function] [call site] 00163
7 functools.partial.children.__name__.data [function] [call site] 00164
7 functools.partial.__name__ [function] [call site] 00165
7 lark.parse_tree_builder.ParseTreeBuilder.create_callback.default_callback [function] [call site] 00166
7 functools.partial.data [function] [call site] 00167
7 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00168
7 lark.parse_tree_builder.ChildFilterLALR_NoPlaceholders.__init__ [function] [call site] 00169
7 lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__ [function] [call site] 00170
7 copy.deepcopy.data.__name__.children [function] [call site] 00171
7 functools.partial.__name__.data [function] [call site] 00172
7 functools.partial.children [function] [call site] 00173
6 .filter [function] [call site] 00174
6 .list [function] [call site] 00175
5 .list [function] [call site] 00176
4 lark.parse_tree_builder.ParseTreeBuilder.create_callback [function] [call site] 00177
5 .getattr [function] [call site] 00178
5 .getattr [function] [call site] 00179
5 .getattr [function] [call site] 00180
5 lark.parse_tree_builder.apply_visit_wrapper [function] [call site] 00181
6 functools.wraps [function] [call site] 00182
6 functools.wraps [function] [call site] 00183
5 .isinstance [function] [call site] 00184
5 lark.parse_tree_builder.inplace_transformer [function] [call site] 00185
6 functools.wraps [function] [call site] 00186
6 functools.wraps [function] [call site] 00187
5 functools.partial.children.__name__ [function] [call site] 00188
5 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00189
5 lark.tree.Tree.__init__ [function] [call site] 00190
5 functools.partial.data.children.__name__ [function] [call site] 00191
5 lark.parse_tree_builder.PropagatePositions.__init__ [function] [call site] 00192
5 functools.partial.children.data.__name__ [function] [call site] 00193
5 lark.parse_tree_builder.AmbiguousExpander.__init__ [function] [call site] 00194
5 functools.partial.data.__name__ [function] [call site] 00195
5 functools.partial.__name__.data.children [function] [call site] 00196
5 functools.partial.__name__.children [function] [call site] 00197
5 functools.partial.data.__name__.children [function] [call site] 00198
5 functools.partial.__name__.children.data [function] [call site] 00199
5 functools.partial [function] [call site] 00200
5 copy.deepcopy.data [function] [call site] 00201
5 copy.deepcopy.data.__name__ [function] [call site] 00202
5 lark.parsers.earley_forest.TreeForestTransformer.__default__ [function] [call site] 00203
5 functools.partial.data.children [function] [call site] 00204
5 functools.partial.children.data [function] [call site] 00205
5 functools.partial.children.__name__.data [function] [call site] 00206
5 functools.partial.__name__ [function] [call site] 00207
5 lark.parse_tree_builder.ParseTreeBuilder.create_callback.default_callback [function] [call site] 00208
5 functools.partial.data [function] [call site] 00209
5 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00210
5 lark.parse_tree_builder.ChildFilterLALR_NoPlaceholders.__init__ [function] [call site] 00211
5 lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__ [function] [call site] 00212
5 copy.deepcopy.data.__name__.children [function] [call site] 00213
5 functools.partial.__name__.data [function] [call site] 00214
5 functools.partial.children [function] [call site] 00215
4 lark.parser_frontends._get_lexer_callbacks [function] [call site] 00216
5 .getattr [function] [call site] 00217
3 lark.parser_frontends._deserialize_parsing_frontend [function] [call site] 00218
4 lark.utils.SerializeMemoizer.deserialize [function] [call site] 00219
4 lark.lark.LarkOptions.deserialize [function] [call site] 00220
4 lark.utils.Serialize.deserialize [function] [call site] 00221
4 options._plugins.get [function] [call site] 00222
4 cls.deserialize [function] [call site] 00223
4 lark.parser_frontends.ParsingFrontend.__init__ [function] [call site] 00224
5 _parser_creators.get [function] [call site] 00225
5 .isinstance [function] [call site] 00226
5 .issubclass [function] [call site] 00227
5 lark.parser_frontends._wrap_lexer [function] [call site] 00228
6 .getattr [function] [call site] 00229
5 lark.parser_frontends._wrap_lexer.CustomLexerWrapper.__init__ [function] [call site] 00230
5 .isinstance [function] [call site] 00231
5 lark.parser_frontends.create_contextual_lexer [function] [call site] 00232
6 options._plugins.get [function] [call site] 00233
6 t.keys [function] [call site] 00234
6 .list [function] [call site] 00235
6 parser._parse_table.states.items [function] [call site] 00236
5 lark.parser_frontends.create_basic_lexer [function] [call site] 00237
6 options._plugins.get [function] [call site] 00238
5 lark.parser_frontends.PostLexConnector.__init__ [function] [call site] 00239
2 logger.exception [function] [call site] 00240
2 lark.load_grammar.load_grammar [function] [call site] 00241
3 lark.load_grammar.GrammarBuilder.__init__ [function] [call site] 00242
3 lark.load_grammar.GrammarBuilder.load_grammar [function] [call site] 00243
4 lark.load_grammar._parse_grammar [function] [call site] 00244
5 lark.load_grammar._get_parser [function] [call site] 00245
6 lark.lexer.Pattern.__init__ [function] [call site] 00246
7 .frozenset [function] [call site] 00247
6 lark.lexer.TerminalDef.__init__ [function] [call site] 00248
7 .isinstance [function] [call site] 00249
6 TERMINALS.items [function] [call site] 00250
6 name.lstrip [function] [call site] 00251
6 name.startswith [function] [call site] 00252
6 lark.grammar.RuleOptions.__init__ [function] [call site] 00253
6 RULES.items [function] [call site] 00254
6 lark.grammar.Symbol.__init__ [function] [call site] 00255
6 lark.load_grammar.symbol_from_strcase [function] [call site] 00256
7 .isinstance [function] [call site] 00257
7 s.isupper [function] [call site] 00258
7 s.startswith [function] [call site] 00259
7 lark.grammar.Terminal.__init__ [function] [call site] 00260
7 lark.grammar.Symbol.__init__ [function] [call site] 00261
6 x.split [function] [call site] 00262
6 lark.grammar.Rule.__init__ [function] [call site] 00263
7 lark.grammar.RuleOptions.__init__ [function] [call site] 00264
7 .tuple [function] [call site] 00265
7 .hash [function] [call site] 00266
6 .enumerate [function] [call site] 00267
6 lark.parse_tree_builder.ParseTreeBuilder.__init__ [function] [call site] 00268
6 lark.parse_tree_builder.ParseTreeBuilder.create_callback [function] [call site] 00269
6 lark.common.LexerConf.__init__ [function] [call site] 00270
7 .len [function] [call site] 00271
7 .len [function] [call site] 00272
6 lark.common.ParserConf.__init__ [function] [call site] 00273
7 .isinstance [function] [call site] 00274
6 lark.parser_frontends.ParsingFrontend.__init__ [function] [call site] 00275
5 e.get_context [function] [call site] 00276
5 e.get_context [function] [call site] 00277
5 lark.load_grammar._get_parser [function] [call site] 00278
5 lark.load_grammar._translate_parser_exception [function] [call site] 00279
6 e.match_examples [function] [call site] 00280
5 lark.visitors.Transformer.__init__ [function] [call site] 00281
5 lark.visitors.Transformer_InPlace.transform [function] [call site] 00282
6 functools.partial.data.iter_subtrees [function] [call site] 00283
6 functools.partial.data.__name__.children.iter_subtrees [function] [call site] 00284
6 functools.partial.data.__name__.iter_subtrees [function] [call site] 00285
6 functools.partial.__name__.data.iter_subtrees [function] [call site] 00286
6 functools.partial.children.__name__.data.iter_subtrees [function] [call site] 00287
6 copy.deepcopy.data.iter_subtrees [function] [call site] 00288
6 functools.partial.data.children.iter_subtrees [function] [call site] 00289
6 copy.deepcopy.data.__name__.iter_subtrees [function] [call site] 00290
6 functools.partial.__name__.data.children.iter_subtrees [function] [call site] 00291
6 copy.deepcopy.iter_subtrees [function] [call site] 00292
6 functools.partial.__name__.children.data.iter_subtrees [function] [call site] 00293
6 functools.partial.__name__.children.iter_subtrees [function] [call site] 00294
6 functools.partial.children.data.iter_subtrees [function] [call site] 00295
6 copy.deepcopy.data.__name__.children.iter_subtrees [function] [call site] 00296
6 functools.partial.iter_subtrees [function] [call site] 00297
6 functools.partial.children.__name__.iter_subtrees [function] [call site] 00298
6 functools.partial.data.children.__name__.iter_subtrees [function] [call site] 00299
6 functools.partial.children.iter_subtrees [function] [call site] 00300
6 functools.partial.children.data.__name__.iter_subtrees [function] [call site] 00301
6 lark.tree.Tree.iter_subtrees [function] [call site] 00302
7 collections.OrderedDict [function] [call site] 00303
7 .id [function] [call site] 00304
7 .reversed [function] [call site] 00305
7 .isinstance [function] [call site] 00306
7 .id [function] [call site] 00307
7 collections.OrderedDict.values [function] [call site] 00308
7 .list [function] [call site] 00309
7 .reversed [function] [call site] 00310
6 functools.partial.__name__.iter_subtrees [function] [call site] 00311
6 lark.visitors.Transformer._transform_children [function] [call site] 00312
7 .isinstance [function] [call site] 00313
7 lark.visitors.Transformer._transform_tree [function] [call site] 00314
8 lark.visitors.Transformer._transform_children [function] [call site] 00315
8 .list [function] [call site] 00316
8 lark.visitors.Transformer._call_userfunc [function] [call site] 00317
9 .getattr [function] [call site] 00318
9 lark.reconstruct.WriteTokensTransformer.__default__ [function] [call site] 00319
10 .getattr [function] [call site] 00320
10 functools.partial.children.__name__ [function] [call site] 00321
10 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00322
10 lark.tree.Tree.__init__ [function] [call site] 00323
10 functools.partial.data.children.__name__ [function] [call site] 00324
10 lark.parse_tree_builder.PropagatePositions.__init__ [function] [call site] 00325
10 functools.partial.children.data.__name__ [function] [call site] 00326
10 lark.parse_tree_builder.AmbiguousExpander.__init__ [function] [call site] 00327
10 functools.partial.data.__name__ [function] [call site] 00328
10 functools.partial.__name__.data.children [function] [call site] 00329
10 functools.partial.__name__.children [function] [call site] 00330
10 functools.partial.data.__name__.children [function] [call site] 00331
10 functools.partial.__name__.children.data [function] [call site] 00332
10 functools.partial [function] [call site] 00333
10 copy.deepcopy.data [function] [call site] 00334
10 copy.deepcopy.data.__name__ [function] [call site] 00335
10 lark.parsers.earley_forest.TreeForestTransformer.__default__ [function] [call site] 00336
10 functools.partial.data.children [function] [call site] 00337
10 functools.partial.children.data [function] [call site] 00338
10 functools.partial.children.__name__.data [function] [call site] 00339
10 functools.partial.__name__ [function] [call site] 00340
10 lark.parse_tree_builder.ParseTreeBuilder.create_callback.default_callback [function] [call site] 00341
10 functools.partial.data [function] [call site] 00342
10 lark.parse_tree_builder.AmbiguousIntermediateExpander.__init__ [function] [call site] 00343
10 lark.parse_tree_builder.ChildFilterLALR_NoPlaceholders.__init__ [function] [call site] 00344
10 lark.parsers.earley_forest.TreeForestTransformer.__default_ambig__ [function] [call site] 00345
10 copy.deepcopy.data.__name__.children [function] [call site] 00346
10 functools.partial.__name__.data [function] [call site] 00347
10 functools.partial.children [function] [call site] 00348
10 .iter [function] [call site] 00349
10 lark.tree_matcher.is_discarded_terminal [function] [call site] 00350
10 .isinstance [function] [call site] 00351
10 to_write.append [function] [call site] 00352
10 .next [function] [call site] 00353
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3 lark.parser_frontends.ParsingFrontend._verify_start [function] [call site] 00632
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