[BentEngbers]

When running the tests cargo test --locked --all --all-features, i got a python module error.
cargo cargo test --locked --all --all-features -- --test-threads=1 seems to solve the issue without any changes.
I don't have that much experience with pyo3 & python so I let claude have stab at it, and these changes seem to resolve the issue.

---

More details:

$ python --version:
Python 3.14.10

$ pip list:

Package Version
pip 26.0.1
prometheus_client 0.26.0

Failed test output

   Compiling pyo3-ffi v0.30.1
   Compiling prometheus-client v0.25.2 (/home/bente/client_rust)
   Compiling pyo3 v0.30.1
   Compiling prometheus-client-derive-encode v0.5.1 (/home/bente/client_rust/derive-encode)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 2.23s
     Running unittests src/lib.rs (target/debug/deps/prometheus_client-af5347f0a0827a3a)

running 114 tests
test encoding::openmetrics_protobuf::tests::encode_counter_double ... ok
test encoding::openmetrics_protobuf::tests::encode_counter_family_with_prefix_with_label ... ok
test encoding::openmetrics_protobuf::tests::encode_counter_int ... ok
test encoding::openmetrics_protobuf::tests::encode_counter_family ... ok
test encoding::openmetrics_protobuf::tests::encode_family_counter_histogram ... ok
test encoding::openmetrics_protobuf::tests::encode_family_and_counter_and_histogram ... ok
test encoding::openmetrics_protobuf::tests::encode_gauge ... ok
test encoding::openmetrics_protobuf::tests::encode_gauge_u64_max ... ok
test encoding::openmetrics_protobuf::tests::encode_counter_with_unit ... ok
test encoding::openmetrics_protobuf::tests::encode_gauge_u64_normal ... ok
test encoding::openmetrics_protobuf::tests::encode_counter_with_exemplar ... ok
test encoding::openmetrics_protobuf::tests::encode_histogram ... ok
test encoding::openmetrics_protobuf::tests::encode_histogram_with_exemplars ... ok
test encoding::openmetrics_protobuf::tests::encode_info ... ok
test encoding::openmetrics_protobuf::tests::encode_native_only_histogram_errors ... ok
test encoding::prometheus_protobuf::tests::encode_classic_and_native_histogram ... ok
test encoding::prometheus_protobuf::tests::encode_counter_family ... ok
test encoding::prometheus_protobuf::tests::encode_counter_family_with_prefix_and_label ... ok
test encoding::prometheus_protobuf::tests::encode_counter_int ... ok
test encoding::prometheus_protobuf::tests::encode_counter_with_exemplar ... ok
test encoding::prometheus_protobuf::tests::encode_counter_with_unit ... ok
test encoding::prometheus_protobuf::tests::encode_gauge ... ok
test encoding::prometheus_protobuf::tests::encode_family_and_counter_and_histogram ... ok
test encoding::prometheus_protobuf::tests::encode_gauge_u64_max ... ok
test encoding::prometheus_protobuf::tests::encode_histogram ... ok
test encoding::prometheus_protobuf::tests::encode_info ... ok
test encoding::prometheus_protobuf::tests::encode_histogram_with_exemplars ... ok
test encoding::prometheus_protobuf::tests::encode_native_histogram ... ok
test encoding::prometheus_protobuf::tests::encode_native_histogram_nan_only_has_no_op_span ... ok
test encoding::prometheus_protobuf::tests::encode_to_vec_length_delimited ... ok
test encoding::prometheus_text::tests::encode_omits_empty_family ... ok
test encoding::prometheus_text::tests::go_float_matches_go ... ok
test encoding::prometheus_text::tests::go_float_matches_go_exponential_buckets ... ok
test encoding::prometheus_text::tests::go_float_matches_go_linear_buckets ... ok
test encoding::text::tests::encode_classic_and_native_histogram_as_classic_text ... ok
test encoding::text::tests::encode_native_only_histogram_errors ... ok
test encoding::text::tests::encode_omit_empty ... ok
test encoding::text::tests::encode_registry_eof ... ok
test encoding::text::tests::label_values_escape_special_characters ... ok
test metrics::counter::tests::f64_stored_in_atomic_u64 ... ok
test metrics::counter::tests::inc_and_get ... ok
test metrics::family::tests::counter_family ... ok
test metrics::family::tests::counter_family_clear ... ok
test metrics::family::tests::counter_family_does_not_deadlock ... ok
test metrics::family::tests::counter_family_remove ... ok
test metrics::family::tests::histogram_family ... ok
test metrics::family::tests::histogram_family_with_struct_constructor ... ok
test metrics::family::tests::test_get ... ok
test metrics::gauge::tests::inc_dec_and_get ... ok
test metrics::histogram::overflow_bucket_tests::explicit_infinite_bound_does_not_duplicate_the_overflow_bucket ... ok
test metrics::histogram::overflow_bucket_tests::infinite_observation_lands_in_the_overflow_bucket ... ok
test metrics::histogram::tests::classic_and_native_histogram_updates_both_representations ... ok
test metrics::histogram::tests::classic_histogram_counts_nan_in_infinity_bucket ... ok
test metrics::histogram::tests::count ... ok
test metrics::histogram::tests::exponential ... ok
test metrics::histogram::tests::exponential_range ... ok
test metrics::histogram::tests::exponential_range_incorrect ... ok
test metrics::histogram::tests::histogram ... ok
test metrics::histogram::tests::linear ... ok
test metrics::histogram::tests::native_histogram_bounds_match_standard_formula ... ok
test metrics::histogram::tests::native_histogram_bucket_index_matches_standard_boundaries ... ok
test metrics::histogram::tests::native_histogram_counts_nan_without_sparse_bucket ... ok
test metrics::histogram::tests::native_histogram_default_uses_recommended_bucket_factor ... ok
test metrics::histogram::tests::native_histogram_downsamples_like_go_client ... ok
test metrics::histogram::tests::native_histogram_encodes_spans_and_deltas ... ok
test metrics::histogram::tests::native_histogram_fails_for_counts_not_fitting_delta_wire_type ... ok
test metrics::histogram::tests::native_histogram_maps_positive_infinity_into_sparse_bucket ... ok
test metrics::histogram::tests::native_histogram_matches_client_golang_scenarios ... ok
test metrics::histogram::tests::native_histogram_negative_zero_threshold_uses_zero_width_zero_bucket ... ok
test metrics::histogram::tests::native_histogram_no_op_span_marks_zero_width_nan_only_histogram ... ok
test metrics::histogram::tests::native_histogram_positive_upper_bound_uses_bucket_index ... ok
test metrics::histogram::tests::native_histogram_reduces_resolution_when_max_bucket_limit_is_hit ... ok
test metrics::histogram::tests::native_histogram_resets_when_limit_is_hit_after_min_reset_duration ... ok
test metrics::histogram::tests::native_histogram_scheduled_reset_is_triggered_by_observe ... ok
test metrics::histogram::tests::native_histogram_schedules_reset_after_degradation ... ok
test metrics::histogram::tests::native_histogram_stores_sparse_buckets ... ok
test metrics::histogram::tests::native_histogram_supports_bucket_factor_constructor ... ok
test metrics::histogram::tests::native_histogram_supports_zero_width_zero_bucket ... ok
test metrics::histogram::tests::native_histogram_widens_zero_bucket_at_min_schema_when_limited ... ok
test metrics::histogram::tests::native_histogram_widens_zero_bucket_before_reducing_resolution ... ok
test metrics::histogram::tests::native_histogram_zero_min_reset_duration_does_not_reset ... ok
test metrics::histogram::tests::native_histogram_zero_threshold_zero_uses_default ... ok
test metrics::histogram::tests::sum ... ok
test registry::tests::register_counter_with_total_suffix - should panic ... ok
test registry::tests::register_gauge_with_total_suffix ... ok
test encoding::text::tests::label_value_escaping_matches_reference ... ok
test encoding::prometheus_text::tests::encode_counter_with_unit_and_exemplar ... FAILED
test encoding::prometheus_text::tests::encode_histogram ... FAILED
test encoding::prometheus_text::tests::encode_special_values ... FAILED
test encoding::prometheus_text::tests::encode_unknown_collector ... FAILED
test encoding::prometheus_text::tests::encode_counter ... FAILED
test encoding::prometheus_text::tests::encode_family_with_const_labels_and_prefix ... FAILED
test encoding::prometheus_text::tests::encode_escapes_help_and_label_values ... FAILED
test encoding::prometheus_text::tests::encode_histogram_without_observations ... FAILED
test encoding::prometheus_text::tests::encode_histogram_drops_exemplars ... FAILED
test encoding::prometheus_text::tests::encode_family_with_empty_label_set ... FAILED
test encoding::prometheus_text::tests::encode_info ... FAILED
test encoding::prometheus_text::tests::encode_gauges ... FAILED
test encoding::prometheus_text::tests::encode_native_histograms ... FAILED
test encoding::text::tests::encode_counter_with_exemplar ... FAILED
test encoding::text::tests::encode_counter_family ... FAILED
test encoding::text::tests::encode_counter_with_unit ... FAILED
test encoding::text::tests::encode_gauge ... FAILED
test encoding::text::tests::encode_counter ... FAILED
test encoding::text::tests::encode_counter_family_with_prefix_with_label ... FAILED
test encoding::text::tests::encode_histogram_family_with_empty_struct_family_labels ... FAILED
test encoding::text::tests::encode_histogram_family ... FAILED
test encoding::text::tests::escaped_label_values_produce_parseable_exposition ... FAILED
test encoding::text::tests::encode_info ... FAILED
test encoding::text::tests::label_sets_can_be_composed ... FAILED
test encoding::text::tests::sub_registry_with_prefix_and_label ... FAILED
test encoding::text::tests::sub_registry_collector ... FAILED
test encoding::text::tests::encode_histogram_with_exemplars ... FAILED
test encoding::text::tests::encode_histogram ... FAILED

failures:

---- encoding::prometheus_text::tests::encode_counter_with_unit_and_exemplar stdout ----
"# HELP my_counter_seconds_total My counter.\n# TYPE my_counter_seconds_total counter\nmy_counter_seconds_total 1\n"

thread 'encoding::prometheus_text::tests::encode_counter_with_unit_and_exemplar' (667771) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "_DeadlockError: deadlock detected by _ModuleLock('prometheus_client.openmetrics') at 140546290219472"

---- encoding::prometheus_text::tests::encode_histogram stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_bucket{le=\"1\"} 1\nmy_histogram_bucket{le=\"2.5\"} 1\nmy_histogram_bucket{le=\"1e+06\"} 1\nmy_histogram_bucket{le=\"+Inf\"} 2\nmy_histogram_sum 2000001.0\nmy_histogram_count 2\n"

thread 'encoding::prometheus_text::tests::encode_histogram' (667776) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_special_values stdout ----
"# HELP pos_inf Pos inf.\n# TYPE pos_inf gauge\npos_inf +Inf\n# HELP neg_inf Neg inf.\n# TYPE neg_inf gauge\nneg_inf -Inf\n# HELP nan NaN.\n# TYPE nan gauge\nnan NaN\n# HELP inf_counter_total Inf counter.\n# TYPE inf_counter_total counter\ninf_counter_total +Inf\n# HELP big_total Big.\n# TYPE big_total counter\nbig_total 9007199254740993\n"

thread 'encoding::prometheus_text::tests::encode_special_values' (667782) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_unknown_collector stdout ----
"# HELP my_const_counter_total some help\n# TYPE my_const_counter_total counter\nmy_const_counter_total 42\n# HELP my_untyped untyped help\n# TYPE my_untyped untyped\nmy_untyped 3\n"

thread 'encoding::prometheus_text::tests::encode_unknown_collector' (667787) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_counter stdout ----
"# HELP my_counter_total My counter.\n# TYPE my_counter_total counter\nmy_counter_total 1000000\n# HELP my_float_counter_total My float counter.\n# TYPE my_float_counter_total counter\nmy_float_counter_total 1.5\n"

thread 'encoding::prometheus_text::tests::encode_counter' (667770) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_family_with_const_labels_and_prefix stdout ----
"# HELP my_prefix_my_counter_family_total My counter family.\n# TYPE my_prefix_my_counter_family_total counter\nmy_prefix_my_counter_family_total{region=\"eu\",method=\"GET\",status=\"200\"} 1\n# HELP my_prefix_my_histogram_family My histogram family.\n# TYPE my_prefix_my_histogram_family histogram\nmy_prefix_my_histogram_family_bucket{region=\"eu\",method=\"GET\",le=\"1\"} 1\nmy_prefix_my_histogram_family_bucket{region=\"eu\",method=\"GET\",le=\"+Inf\"} 1\nmy_prefix_my_histogram_family_sum{region=\"eu\",method=\"GET\"} 0.5\nmy_prefix_my_histogram_family_count{region=\"eu\",method=\"GET\"} 1\n"

thread 'encoding::prometheus_text::tests::encode_family_with_const_labels_and_prefix' (667773) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_escapes_help_and_label_values stdout ----
"# HELP my_gauge Help with \\\\ backslash, \"quotes\" and\\nnewline.\n# TYPE my_gauge gauge\nmy_gauge{path=\"C:\\\\dir \\\"quoted\\\"\\nnext\"} 2\n"

thread 'encoding::prometheus_text::tests::encode_escapes_help_and_label_values' (667772) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_histogram_without_observations stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_bucket{le=\"0.5\"} 0\nmy_histogram_bucket{le=\"+Inf\"} 0\nmy_histogram_sum 0.0\nmy_histogram_count 0\n# HELP my_histogram_family My histogram family.\n# TYPE my_histogram_family histogram\nmy_histogram_family_bucket{method=\"GET\",le=\"0.5\"} 0\nmy_histogram_family_bucket{method=\"GET\",le=\"+Inf\"} 0\nmy_histogram_family_sum{method=\"GET\"} 0.0\nmy_histogram_family_count{method=\"GET\"} 0\nmy_histogram_family_bucket{method=\"POST\",status=\"500\",le=\"0.5\"} 0\nmy_histogram_family_bucket{method=\"POST\",status=\"500\",le=\"+Inf\"} 0\nmy_histogram_family_sum{method=\"POST\",status=\"500\"} 0.0\nmy_histogram_family_count{method=\"POST\",status=\"500\"} 0\n"

thread 'encoding::prometheus_text::tests::encode_histogram_without_observations' (667778) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_histogram_drops_exemplars stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_bucket{le=\"0.5\"} 1\nmy_histogram_bucket{le=\"+Inf\"} 1\nmy_histogram_sum 0.25\nmy_histogram_count 1\n# HELP my_histogram_family My histogram family.\n# TYPE my_histogram_family histogram\nmy_histogram_family_bucket{method=\"POST\",status=\"500\",le=\"0.5\"} 0\nmy_histogram_family_bucket{method=\"POST\",status=\"500\",le=\"+Inf\"} 1\nmy_histogram_family_sum{method=\"POST\",status=\"500\"} 0.75\nmy_histogram_family_count{method=\"POST\",status=\"500\"} 1\nmy_histogram_family_bucket{method=\"GET\",le=\"0.5\"} 1\nmy_histogram_family_bucket{method=\"GET\",le=\"+Inf\"} 1\nmy_histogram_family_sum{method=\"GET\"} 0.25\nmy_histogram_family_count{method=\"GET\"} 1\n"

thread 'encoding::prometheus_text::tests::encode_histogram_drops_exemplars' (667777) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_family_with_empty_label_set stdout ----
"# HELP my_counter_total My counter.\n# TYPE my_counter_total counter\nmy_counter_total 1\n"

thread 'encoding::prometheus_text::tests::encode_family_with_empty_label_set' (667774) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_info stdout ----
"# HELP my_info_metric_info My info metric.\n# TYPE my_info_metric_info gauge\nmy_info_metric_info{env=\"prod\",os=\"GNU/linux\"} 1\n"

thread 'encoding::prometheus_text::tests::encode_info' (667779) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_gauges stdout ----
"# HELP my_gauge My gauge.\n# TYPE my_gauge gauge\nmy_gauge -3\n# HELP my_float_gauge My float gauge.\n# TYPE my_float_gauge gauge\nmy_float_gauge 0.25\n# HELP my_u32_gauge My u32 gauge.\n# TYPE my_u32_gauge gauge\nmy_u32_gauge 7\n# HELP my_u64_gauge My u64 gauge.\n# TYPE my_u64_gauge gauge\nmy_u64_gauge 0\n# HELP my_i64_gauge My i64 gauge.\n# TYPE my_i64_gauge gauge\nmy_i64_gauge -1\n"

thread 'encoding::prometheus_text::tests::encode_gauges' (667775) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::prometheus_text::tests::encode_native_histograms stdout ----
"# HELP native_only Native only.\n# TYPE native_only histogram\nnative_only_bucket{le=\"+Inf\"} 1\nnative_only_sum 3.0\nnative_only_count 1\n# HELP native_and_classic Native and classic.\n# TYPE native_and_classic histogram\nnative_and_classic_bucket{le=\"1\"} 1\nnative_and_classic_bucket{le=\"+Inf\"} 1\nnative_and_classic_sum 0.5\nnative_and_classic_count 1\n"

thread 'encoding::prometheus_text::tests::encode_native_histograms' (667780) panicked at src/encoding/prometheus_text.rs:1120:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_counter_with_exemplar stdout ----
"# HELP my_counter_with_exemplar_seconds My counter with exemplar.\n# TYPE my_counter_with_exemplar_seconds counter\n# UNIT my_counter_with_exemplar_seconds seconds\nmy_counter_with_exemplar_seconds_total 1 # {user_id=\"42\"} 1.0\n# EOF\n"

thread 'encoding::text::tests::encode_counter_with_exemplar' (667795) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_counter_family stdout ----
"# HELP my_counter_family My counter family.\n# TYPE my_counter_family counter\nmy_counter_family_total{method=\"GET\",status=\"200\"} 1\n# EOF\n"

thread 'encoding::text::tests::encode_counter_family' (667793) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_counter_with_unit stdout ----
"# HELP my_counter_seconds My counter.\n# TYPE my_counter_seconds counter\n# UNIT my_counter_seconds seconds\nmy_counter_seconds_total 0\n# EOF\n"

thread 'encoding::text::tests::encode_counter_with_unit' (667796) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_gauge stdout ----
"# HELP my_gauge My gauge.\n# TYPE my_gauge gauge\nmy_gauge 0\n# HELP u32_gauge Gauge::<u32, AtomicU32>.\n# TYPE u32_gauge gauge\nu32_gauge 0\n# HELP f32_gauge Gauge::<f32, AtomicU32>.\n# TYPE f32_gauge gauge\nf32_gauge 0.0\n# HELP i32_gauge Gauge::<i32, AtomicU32>.\n# TYPE i32_gauge gauge\ni32_gauge 0\n# EOF\n"

thread 'encoding::text::tests::encode_gauge' (667797) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_counter stdout ----
"# HELP my_counter My counter.\n# TYPE my_counter counter\nmy_counter_total 0\n# HELP f32_counter Counter::<f32, AtomicU32>.\n# TYPE f32_counter counter\nf32_counter_total 0.0\n# HELP u32_counter Counter::<u32, AtomicU32>.\n# TYPE u32_counter counter\nu32_counter_total 0\n# EOF\n"

thread 'encoding::text::tests::encode_counter' (667792) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_counter_family_with_prefix_with_label stdout ----
"# HELP my_prefix_my_counter_family My counter family.\n# TYPE my_prefix_my_counter_family counter\nmy_prefix_my_counter_family_total{my_key=\"my_value\",method=\"GET\",status=\"200\"} 1\n# EOF\n"

thread 'encoding::text::tests::encode_counter_family_with_prefix_with_label' (667794) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_histogram_family_with_empty_struct_family_labels stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_sum{} 1.0\nmy_histogram_count{} 1\nmy_histogram_bucket{le=\"1.0\"} 1\nmy_histogram_bucket{le=\"2.0\"} 1\nmy_histogram_bucket{le=\"4.0\"} 1\nmy_histogram_bucket{le=\"8.0\"} 1\nmy_histogram_bucket{le=\"16.0\"} 1\nmy_histogram_bucket{le=\"32.0\"} 1\nmy_histogram_bucket{le=\"64.0\"} 1\nmy_histogram_bucket{le=\"128.0\"} 1\nmy_histogram_bucket{le=\"256.0\"} 1\nmy_histogram_bucket{le=\"512.0\"} 1\nmy_histogram_bucket{le=\"+Inf\"} 1\n# EOF\n"

thread 'encoding::text::tests::encode_histogram_family_with_empty_struct_family_labels' (667800) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_histogram_family stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_sum{method=\"GET\",status=\"200\"} 1.0\nmy_histogram_count{method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"1.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"2.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"4.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"8.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"16.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"32.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"64.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"128.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"256.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"512.0\",method=\"GET\",status=\"200\"} 1\nmy_histogram_bucket{le=\"+Inf\",method=\"GET\",status=\"200\"} 1\n# EOF\n"

thread 'encoding::text::tests::encode_histogram_family' (667799) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::escaped_label_values_produce_parseable_exposition stdout ----
"# HELP requests Requests.\n# TYPE requests counter\nrequests_total{client_version=\"a\\\"} evil{x=\\\"1\\\\line\\nnext\"} 1\n# EOF\n"

thread 'encoding::text::tests::escaped_label_values_produce_parseable_exposition' (667806) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_info stdout ----
"# HELP my_info_metric My info metric.\n# TYPE my_info_metric info\nmy_info_metric_info{os=\"GNU/linux\"} 1\n# EOF\n"

thread 'encoding::text::tests::encode_info' (667802) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::label_sets_can_be_composed stdout ----
"# HELP items Example metric.\n# TYPE items counter\nitems_total{color=\"red\",size=\"large\"} 1\n# EOF\n"

thread 'encoding::text::tests::label_sets_can_be_composed' (667807) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::sub_registry_with_prefix_and_label stdout ----
"# HELP my_top_level_metric some help.\n# TYPE my_top_level_metric counter\nmy_top_level_metric_total 0\n# HELP prefix_1_my_prefix_1_metric some help.\n# TYPE prefix_1_my_prefix_1_metric counter\nprefix_1_my_prefix_1_metric_total 0\n# HELP prefix_1_prefix_1_1_my_prefix_1_1_metric some help.\n# TYPE prefix_1_prefix_1_1_my_prefix_1_1_metric counter\nprefix_1_prefix_1_1_my_prefix_1_1_metric_total 0\n# HELP prefix_1_my_prefix_1_2_metric some help.\n# TYPE prefix_1_my_prefix_1_2_metric counter\nprefix_1_my_prefix_1_2_metric_total{registry=\"1_2\"} 0\n# HELP prefix_1_my_prefix_1_3_metric some help.\n# TYPE prefix_1_my_prefix_1_3_metric counter\nprefix_1_my_prefix_1_3_metric_total{label_1_3_1=\"value_1_3_1\",label_1_3_2=\"value_1_3_2\"} 0\n# HELP prefix_1_prefix_1_3_1_my_prefix_1_3_1_metric some help.\n# TYPE prefix_1_prefix_1_3_1_my_prefix_1_3_1_metric counter\nprefix_1_prefix_1_3_1_my_prefix_1_3_1_metric_total{label_1_3_1=\"value_1_3_1\",label_1_3_2=\"value_1_3_2\"} 0\n# HELP prefix_3_my_prefix_3_metric some help.\n# TYPE prefix_3_my_prefix_3_metric counter\nprefix_3_my_prefix_3_metric_total 0\n# EOF\n"

thread 'encoding::text::tests::sub_registry_with_prefix_and_label' (667811) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::sub_registry_collector stdout ----
"# HELP top_level some help\n# TYPE top_level counter\ntop_level_total 42\n# HELP prefix_1_sub_level some help\n# TYPE prefix_1_sub_level counter\nprefix_1_sub_level_total 42\n# HELP prefix_1_prefix_1_2_sub_sub_level some help\n# TYPE prefix_1_prefix_1_2_sub_sub_level counter\nprefix_1_prefix_1_2_sub_sub_level_total 42\n# EOF\n"

thread 'encoding::text::tests::sub_registry_collector' (667810) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_histogram_with_exemplars stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_sum 3.0\nmy_histogram_count 2\nmy_histogram_bucket{le=\"1.0\"} 1 # {user_id=\"42\"} 1.0 1794329323.6953793\nmy_histogram_bucket{le=\"2.0\"} 2 # {user_id=\"99\"} 2.0\nmy_histogram_bucket{le=\"4.0\"} 2\nmy_histogram_bucket{le=\"8.0\"} 2\nmy_histogram_bucket{le=\"16.0\"} 2\nmy_histogram_bucket{le=\"32.0\"} 2\nmy_histogram_bucket{le=\"64.0\"} 2\nmy_histogram_bucket{le=\"128.0\"} 2\nmy_histogram_bucket{le=\"256.0\"} 2\nmy_histogram_bucket{le=\"512.0\"} 2\nmy_histogram_bucket{le=\"+Inf\"} 2\n# EOF\n"

thread 'encoding::text::tests::encode_histogram_with_exemplars' (667801) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"

---- encoding::text::tests::encode_histogram stdout ----
"# HELP my_histogram My histogram.\n# TYPE my_histogram histogram\nmy_histogram_sum 1.0\nmy_histogram_count 1\nmy_histogram_bucket{le=\"1.0\"} 1\nmy_histogram_bucket{le=\"2.0\"} 1\nmy_histogram_bucket{le=\"4.0\"} 1\nmy_histogram_bucket{le=\"8.0\"} 1\nmy_histogram_bucket{le=\"16.0\"} 1\nmy_histogram_bucket{le=\"32.0\"} 1\nmy_histogram_bucket{le=\"64.0\"} 1\nmy_histogram_bucket{le=\"128.0\"} 1\nmy_histogram_bucket{le=\"256.0\"} 1\nmy_histogram_bucket{le=\"512.0\"} 1\nmy_histogram_bucket{le=\"+Inf\"} 1\n# EOF\n"

thread 'encoding::text::tests::encode_histogram' (667798) panicked at src/encoding/text.rs:1448:14:
called `Result::unwrap()` on an `Err` value: "ImportError: Loaded module 'parser' not found in sys.modules"


failures:
    encoding::prometheus_text::tests::encode_counter
    encoding::prometheus_text::tests::encode_counter_with_unit_and_exemplar
    encoding::prometheus_text::tests::encode_escapes_help_and_label_values
    encoding::prometheus_text::tests::encode_family_with_const_labels_and_prefix
    encoding::prometheus_text::tests::encode_family_with_empty_label_set
    encoding::prometheus_text::tests::encode_gauges
    encoding::prometheus_text::tests::encode_histogram
    encoding::prometheus_text::tests::encode_histogram_drops_exemplars
    encoding::prometheus_text::tests::encode_histogram_without_observations
    encoding::prometheus_text::tests::encode_info
    encoding::prometheus_text::tests::encode_native_histograms
    encoding::prometheus_text::tests::encode_special_values
    encoding::prometheus_text::tests::encode_unknown_collector
    encoding::text::tests::encode_counter
    encoding::text::tests::encode_counter_family
    encoding::text::tests::encode_counter_family_with_prefix_with_label
    encoding::text::tests::encode_counter_with_exemplar
    encoding::text::tests::encode_counter_with_unit
    encoding::text::tests::encode_gauge
    encoding::text::tests::encode_histogram
    encoding::text::tests::encode_histogram_family
    encoding::text::tests::encode_histogram_family_with_empty_struct_family_labels
    encoding::text::tests::encode_histogram_with_exemplars
    encoding::text::tests::encode_info
    encoding::text::tests::escaped_label_values_produce_parseable_exposition
    encoding::text::tests::label_sets_can_be_composed
    encoding::text::tests::sub_registry_collector
    encoding::text::tests::sub_registry_with_prefix_and_label

test result: FAILED. 86 passed; 28 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s

error: test failed, to rerun pass `-p prometheus-client --lib`