[INFO] fetching crate biodivine-lib-bdd 0.3.0...
[INFO] testing biodivine-lib-bdd-0.3.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate biodivine-lib-bdd 0.3.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate biodivine-lib-bdd 0.3.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate biodivine-lib-bdd 0.3.0
[INFO] finished tweaking crates.io crate biodivine-lib-bdd 0.3.0
[INFO] tweaked toml for crates.io crate biodivine-lib-bdd 0.3.0 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4d3b4984b11e5f5ba5361efdc460902a4f94040826e0e8db49bf246e70005c3
[INFO] running `Command { std: "docker" "start" "-a" "c4d3b4984b11e5f5ba5361efdc460902a4f94040826e0e8db49bf246e70005c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4d3b4984b11e5f5ba5361efdc460902a4f94040826e0e8db49bf246e70005c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d3b4984b11e5f5ba5361efdc460902a4f94040826e0e8db49bf246e70005c3", kill_on_drop: false }`
[INFO] [stdout] c4d3b4984b11e5f5ba5361efdc460902a4f94040826e0e8db49bf246e70005c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70f22f4d9c6aeda5dbacf6fdd263cbf294a73b2701b9d2bb3b77481b12946569
[INFO] running `Command { std: "docker" "start" "-a" "70f22f4d9c6aeda5dbacf6fdd263cbf294a73b2701b9d2bb3b77481b12946569", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling biodivine-lib-bdd v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "70f22f4d9c6aeda5dbacf6fdd263cbf294a73b2701b9d2bb3b77481b12946569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f22f4d9c6aeda5dbacf6fdd263cbf294a73b2701b9d2bb3b77481b12946569", kill_on_drop: false }`
[INFO] [stdout] 70f22f4d9c6aeda5dbacf6fdd263cbf294a73b2701b9d2bb3b77481b12946569
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bff012244655b005cee8d92aa82643afb43d423e9244f6013c2c107132510f08
[INFO] running `Command { std: "docker" "start" "-a" "bff012244655b005cee8d92aa82643afb43d423e9244f6013c2c107132510f08", kill_on_drop: false }`
[INFO] [stderr]    Compiling biodivine-lib-bdd v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "bff012244655b005cee8d92aa82643afb43d423e9244f6013c2c107132510f08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bff012244655b005cee8d92aa82643afb43d423e9244f6013c2c107132510f08", kill_on_drop: false }`
[INFO] [stdout] bff012244655b005cee8d92aa82643afb43d423e9244f6013c2c107132510f08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7c6fc18af823ab5c2e5116589c18a3ed73df0141c1e58f2b6d1b532a42f3f67a
[INFO] running `Command { std: "docker" "start" "-a" "7c6fc18af823ab5c2e5116589c18a3ed73df0141c1e58f2b6d1b532a42f3f67a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/biodivine_lib_bdd-effd4161cdc0e958)
[INFO] [stdout] 
[INFO] [stdout] running 95 tests
[INFO] [stdout] test _impl_bdd::_impl_export_dot::tests::bdd_to_dot ... ok
[INFO] [stdout] test _impl_bdd::_impl_export_dot::tests::bdd_universe_bdd_to_dot ... ok
[INFO] [stdout] test _impl_bdd::_impl_export_dot::tests::bdd_to_dot_pruned ... ok
[INFO] [stdout] test _impl_bdd::_impl_serialisation::tests::bdd_to_bytes ... ok
[INFO] [stdout] test _impl_bdd::_impl_serialisation::tests::bdd_from_string ... ok
[INFO] [stdout] test _impl_bdd::_impl_serialisation::tests::bdd_to_string ... ok
[INFO] [stdout] test _impl_bdd::_impl_export_dot::tests::bdd_universe_bdd_to_dot_pruned ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_cardinality ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_impl ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_sat_witness_basic ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_clause_check ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_sat_witness_advanced ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_to_formula ... ok
[INFO] [stdout] test _impl_bdd::_impl_valuation_utils::tests::first_last_valuation ... ok
[INFO] [stdout] test _impl_bdd::_impl_valuation_utils::tests::first_last_clause ... ok
[INFO] [stdout] test _impl_bdd::_impl_valuation_utils::tests::most_positive_negative_valuation ... ok
[INFO] [stdout] test _impl_bdd::_impl_util::tests::bdd_valuation_check ... ok
[INFO] [stdout] test _impl_bdd::_impl_valuation_utils::tests::most_fixed_free_clause ... ok
[INFO] [stdout] test _impl_bdd_node::tests::bdd_node_create ... ok
[INFO] [stdout] test _impl_bdd_node::tests::bdd_node_one ... ok
[INFO] [stdout] test _impl_bdd_node::tests::bdd_node_zero ... ok
[INFO] [stdout] test _impl_bdd::_impl_valuation_utils::tests::random_valuation ... ok
[INFO] [stdout] test _impl_bdd_partial_valuation::tests::basic_partial_valuation_properties ... ok
[INFO] [stdout] test _impl_bdd_path_iterator::tests::bdd_path_iterator ... ok
[INFO] [stdout] test _impl_bdd_path_iterator::tests::bdd_path_iterator_trivial ... ok
[INFO] [stdout] test _impl_bdd_satisfying_valuations::tests::bdd_sat_valuations_trivial ... ok
[INFO] [stdout] test _impl_bdd_satisfying_valuations::tests::bdd_sat_valuations ... ok
[INFO] [stdout] test _impl_bdd_valuation::tests::bdd_universe_eval ... ok
[INFO] [stdout] test _impl_bdd_valuation::tests::bdd_valuation_print ... ok
[INFO] [stdout] test _impl_bdd_valuation::tests::valuation_consistency ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_mk_clause ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_mk_empty_clause ... ok
[INFO] [stdout] test _impl_bdd::_impl_valuation_utils::tests::random_clause ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_universe_anonymous ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_universe_mk_const ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_mk_normal_form ... ok
[INFO] [stdout] test _impl_bdd_variable_set_builder::tests::bdd_variables_builder ... ok
[INFO] [stdout] test _impl_bdd_variable_set_builder::tests::bdd_variables_builder_batch ... ok
[INFO] [stdout] test _impl_iterator_valuations_of_clause::tests::valuations_of_clause_iterator_constrained ... ok
[INFO] [stdout] test _impl_iterator_valuations_of_clause::tests::valuations_of_clause_iterator_unconstrained ... ok
[INFO] [stdout] test _macro_bdd::tests::bdd_macro_advanced ... ok
[INFO] [stdout] test _macro_bdd::tests::bdd_macro_test ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_de_morgan ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_flip_preserves_equivalence ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_constants ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_iff ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_imp ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_not ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_and ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::invert_input ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_not_preserves_equivalence ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_or ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_xor ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::simple_identities_syntactic ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::bdd_mk_and_not ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_basic::nontrivial_identity_syntactic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_complex ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_pick_trivial ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_basic ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_projection_trivial ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_select ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_pick_simple ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_projection_simple ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_var_projection ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_operator_associativity ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_var_select ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_var_pick_random ... ok
[INFO] [stdout] test boolean_expression::_impl_boolean_expression::tests::bdd_universe_eval_boolean_formula ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_var_pick ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_operator_priority ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_mk_conjunctive_clause_fails - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_mk_disjunctive_clause_fails - should panic ... ok
[INFO] [stdout] test _impl_bdd_valuation::tests::bdd_universe_eval_invalid - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_universe_mk_not_var_by_name_invalid_name - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_universe_mk_var_by_name_invalid_name - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_universe_mk_not_var_invalid_id - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set::tests::bdd_universe_mk_var_invalid_id - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set_builder::tests::bdd_variables_builder_invalid_name - should panic ... ok
[INFO] [stdout] test _impl_bdd_variable_set_builder::tests::bdd_variables_builder_duplicate_variable - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_parentheses_1 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_parentheses_3 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_formula_1 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_formula_2 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_parentheses_2 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_parentheses_4 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_token_1 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_token_3 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_token_2 - should panic ... ok
[INFO] [stdout] test boolean_expression::_impl_parser::tests::parse_boolean_formula_invalid_token_4 - should panic ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_relation_ops::bdd_pick_random ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_fuzzing::fuzz_var_2 ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_fuzzing::fuzz_var_4 ... ok
[INFO] [stdout] test _impl_bdd_variable_set_builder::tests::bdd_variables_builder_too_large - should panic ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_fuzzing::fuzz_var_8 ... ok
[INFO] [stdout] test _test_bdd::_test_bdd_logic_fuzzing::fuzz_var_12 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 95 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 14.94s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests biodivine-lib-bdd
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test src/tutorial/p02_bdd_variable_set.rs - tutorial::p02_bdd_variable_set (line 37) ... ok
[INFO] [stdout] test src/tutorial/p02_bdd_variable_set.rs - tutorial::p02_bdd_variable_set (line 67) ... ok
[INFO] [stdout] test src/tutorial/p03_bdd_manipulation.rs - tutorial::p03_bdd_manipulation (line 32) ... ok
[INFO] [stdout] test src/boolean_expression/mod.rs - boolean_expression (line 6) ... ok
[INFO] [stdout] test src/tutorial/p02_bdd_variable_set.rs - tutorial::p02_bdd_variable_set (line 49) ... ok
[INFO] [stdout] test src/tutorial/p05_bdd_valuations.rs - tutorial::p05_bdd_valuations (line 42) ... ok
[INFO] [stdout] test src/tutorial/p06_bdd_advanced_operations.rs - tutorial::p06_bdd_advanced_operations (line 14) ... ok
[INFO] [stdout] test src/tutorial/p03_bdd_manipulation.rs - tutorial::p03_bdd_manipulation (line 11) ... ok
[INFO] [stdout] test src/tutorial/p06_bdd_advanced_operations.rs - tutorial::p06_bdd_advanced_operations (line 105) ... ok
[INFO] [stdout] test src/tutorial/p04_bdd_serialisation.rs - tutorial::p04_bdd_serialisation (line 36) ... ok
[INFO] [stdout] test src/tutorial/p06_bdd_advanced_operations.rs - tutorial::p06_bdd_advanced_operations (line 63) ... ok
[INFO] [stdout] test src/tutorial/p04_bdd_serialisation.rs - tutorial::p04_bdd_serialisation (line 18) ... ok
[INFO] [stdout] test src/tutorial/p03_bdd_manipulation.rs - tutorial::p03_bdd_manipulation (line 103) ... ok
[INFO] [stdout] test src/tutorial/p02_bdd_variable_set.rs - tutorial::p02_bdd_variable_set (line 11) ... ok
[INFO] [stdout] test src/tutorial/p03_bdd_manipulation.rs - tutorial::p03_bdd_manipulation (line 74) ... ok
[INFO] [stdout] test src/tutorial/p04_bdd_serialisation.rs - tutorial::p04_bdd_serialisation (line 54) ... ok
[INFO] [stdout] test src/lib.rs - (line 26) ... ok
[INFO] [stdout] test src/tutorial/p05_bdd_valuations.rs - tutorial::p05_bdd_valuations (line 12) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.36s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7c6fc18af823ab5c2e5116589c18a3ed73df0141c1e58f2b6d1b532a42f3f67a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c6fc18af823ab5c2e5116589c18a3ed73df0141c1e58f2b6d1b532a42f3f67a", kill_on_drop: false }`
[INFO] [stdout] 7c6fc18af823ab5c2e5116589c18a3ed73df0141c1e58f2b6d1b532a42f3f67a