[INFO] fetching crate opentelemetry_api 0.1.0...
[INFO] testing opentelemetry_api-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate opentelemetry_api 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate opentelemetry_api 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate opentelemetry_api 0.1.0
[INFO] finished tweaking crates.io crate opentelemetry_api 0.1.0
[INFO] tweaked toml for crates.io crate opentelemetry_api 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rusty-fork v0.2.2
[INFO] [stderr]   Downloaded proptest v0.9.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1214f903c310473f00f9689e7a04497ef9d11ad9cae59031c1a81fe8c821cebb
[INFO] running `Command { std: "docker" "start" "-a" "1214f903c310473f00f9689e7a04497ef9d11ad9cae59031c1a81fe8c821cebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1214f903c310473f00f9689e7a04497ef9d11ad9cae59031c1a81fe8c821cebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1214f903c310473f00f9689e7a04497ef9d11ad9cae59031c1a81fe8c821cebb", kill_on_drop: false }`
[INFO] [stdout] 1214f903c310473f00f9689e7a04497ef9d11ad9cae59031c1a81fe8c821cebb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a3bbaaf1a425eb941f16591b41fe76f9f792afb8d54bd791de9b92e69f93cad
[INFO] running `Command { std: "docker" "start" "-a" "0a3bbaaf1a425eb941f16591b41fe76f9f792afb8d54bd791de9b92e69f93cad", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling opentelemetry_api v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/trace/tracer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: patterns aren't allowed in functions without bodies
[INFO] [stdout]  --> src/context/mod.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn close(mut self);
[INFO] [stdout]   |              ^^^^^^^^ help: remove `mut` from the parameter: `self`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(patterns_in_fns_without_body)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #35203 <https://github.com/rust-lang/rust/issues/35203>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `measurements`
[INFO] [stdout]    --> src/metric/meter.rs:177:29
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn record<I>(&mut self, measurements: I) where I: IntoIterator<Item=measure::NoopMeasurement> {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_measurements`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/metric/measure.rs:92:31
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn double_measurement<'a>(value: f64) -> Self::Measurement {
[INFO] [stdout]    |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/metric/measure.rs:96:29
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn long_measurement<'a>(value: i64) -> Self::Measurement {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]    --> src/metric/measure.rs:100:14
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn build(builder: MeasureBuilder<Self>) -> Result<Self, Self::Error> where Self: Sized {
[INFO] [stdout]     |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/metric/measure.rs:78:18
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn build(mut self) -> Result<M, M::Error> {
[INFO] [stdout]    |                  ----^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/trace/trace_state.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/trace/trace_state.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/trace/trace_state.rs:120:51
[INFO] [stdout]     |
[INFO] [stdout] 120 |     }), "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stdout]     |                                                   ^                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 120 |     }), "{}", "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]   --> src/trace/span.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub trait Span: Drop {
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]  --> src/context/mod.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Scope: Drop {
[INFO] [stdout]   |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.29s
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0a3bbaaf1a425eb941f16591b41fe76f9f792afb8d54bd791de9b92e69f93cad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a3bbaaf1a425eb941f16591b41fe76f9f792afb8d54bd791de9b92e69f93cad", kill_on_drop: false }`
[INFO] [stdout] 0a3bbaaf1a425eb941f16591b41fe76f9f792afb8d54bd791de9b92e69f93cad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bfe0e4875e963cdded4f2ba3dbdec79a3ac51fbe3c96c67ea2a71a88a3b2ce2
[INFO] running `Command { std: "docker" "start" "-a" "0bfe0e4875e963cdded4f2ba3dbdec79a3ac51fbe3c96c67ea2a71a88a3b2ce2", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/trace/tracer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: patterns aren't allowed in functions without bodies
[INFO] [stdout]  --> src/context/mod.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn close(mut self);
[INFO] [stdout]   |              ^^^^^^^^ help: remove `mut` from the parameter: `self`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(patterns_in_fns_without_body)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #35203 <https://github.com/rust-lang/rust/issues/35203>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `measurements`
[INFO] [stdout]    --> src/metric/meter.rs:177:29
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn record<I>(&mut self, measurements: I) where I: IntoIterator<Item=measure::NoopMeasurement> {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_measurements`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/metric/measure.rs:92:31
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn double_measurement<'a>(value: f64) -> Self::Measurement {
[INFO] [stdout]    |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/metric/measure.rs:96:29
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn long_measurement<'a>(value: i64) -> Self::Measurement {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]    --> src/metric/measure.rs:100:14
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn build(builder: MeasureBuilder<Self>) -> Result<Self, Self::Error> where Self: Sized {
[INFO] [stdout]     |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/metric/measure.rs:78:18
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn build(mut self) -> Result<M, M::Error> {
[INFO] [stdout]    |                  ----^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/trace/trace_state.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/trace/trace_state.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/trace/trace_state.rs:120:51
[INFO] [stdout]     |
[INFO] [stdout] 120 |     }), "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stdout]     |                                                   ^                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 120 |     }), "{}", "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]   --> src/trace/span.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub trait Span: Drop {
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]  --> src/context/mod.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Scope: Drop {
[INFO] [stdout]   |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling rusty-fork v0.2.2
[INFO] [stderr]    Compiling proptest v0.9.6
[INFO] [stderr]    Compiling opentelemetry_api v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/trace/tracer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: patterns aren't allowed in functions without bodies
[INFO] [stdout]  --> src/context/mod.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn close(mut self);
[INFO] [stdout]   |              ^^^^^^^^ help: remove `mut` from the parameter: `self`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(patterns_in_fns_without_body)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #35203 <https://github.com/rust-lang/rust/issues/35203>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `measurements`
[INFO] [stdout]    --> src/metric/meter.rs:177:29
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn record<I>(&mut self, measurements: I) where I: IntoIterator<Item=measure::NoopMeasurement> {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_measurements`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `counter`
[INFO] [stdout]    --> src/metric/meter.rs:189:13
[INFO] [stdout]     |
[INFO] [stdout] 189 |         let counter = m.counter_long("test").build().unwrap();
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_counter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/metric/measure.rs:92:31
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn double_measurement<'a>(value: f64) -> Self::Measurement {
[INFO] [stdout]    |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/metric/measure.rs:96:29
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn long_measurement<'a>(value: i64) -> Self::Measurement {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]    --> src/metric/measure.rs:100:14
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn build(builder: MeasureBuilder<Self>) -> Result<Self, Self::Error> where Self: Sized {
[INFO] [stdout]     |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/metric/measure.rs:78:18
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn build(mut self) -> Result<M, M::Error> {
[INFO] [stdout]    |                  ----^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/trace/trace_state.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/trace/trace_state.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/trace/trace_state.rs:120:51
[INFO] [stdout]     |
[INFO] [stdout] 120 |     }), "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stdout]     |                                                   ^                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 120 |     }), "{}", "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]   --> src/trace/span.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub trait Span: Drop {
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]  --> src/context/mod.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Scope: Drop {
[INFO] [stdout]   |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 23.49s
[INFO] running `Command { std: "docker" "inspect" "0bfe0e4875e963cdded4f2ba3dbdec79a3ac51fbe3c96c67ea2a71a88a3b2ce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bfe0e4875e963cdded4f2ba3dbdec79a3ac51fbe3c96c67ea2a71a88a3b2ce2", kill_on_drop: false }`
[INFO] [stdout] 0bfe0e4875e963cdded4f2ba3dbdec79a3ac51fbe3c96c67ea2a71a88a3b2ce2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7497b02f63eff2a48b8b0d2754fe6ee8e086ceb435c1ff11eafce4613378170c
[INFO] running `Command { std: "docker" "start" "-a" "7497b02f63eff2a48b8b0d2754fe6ee8e086ceb435c1ff11eafce4613378170c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::borrow::Cow`
[INFO] [stderr]  --> src/trace/tracer.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::borrow::Cow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: patterns aren't allowed in functions without bodies
[INFO] [stderr]  --> src/context/mod.rs:2:14
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fn close(mut self);
[INFO] [stderr]   |              ^^^^^^^^ help: remove `mut` from the parameter: `self`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(patterns_in_fns_without_body)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]   = note: for more information, see issue #35203 <https://github.com/rust-lang/rust/issues/35203>
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `measurements`
[INFO] [stderr]    --> src/metric/meter.rs:177:29
[INFO] [stderr]     |
[INFO] [stderr] 177 |     fn record<I>(&mut self, measurements: I) where I: IntoIterator<Item=measure::NoopMeasurement> {
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_measurements`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/metric/measure.rs:92:31
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn double_measurement<'a>(value: f64) -> Self::Measurement {
[INFO] [stderr]    |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/metric/measure.rs:96:29
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn long_measurement<'a>(value: i64) -> Self::Measurement {
[INFO] [stderr]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `builder`
[INFO] [stderr]    --> src/metric/measure.rs:100:14
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn build(builder: MeasureBuilder<Self>) -> Result<Self, Self::Error> where Self: Sized {
[INFO] [stderr]     |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/metric/measure.rs:78:18
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn build(mut self) -> Result<M, M::Error> {
[INFO] [stderr]    |                  ----^^^^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/trace/trace_state.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/trace/trace_state.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |         let mut entries = self.entries.get_or_insert(self.parent.map_or(vec![], |x| x.entries.clone()));
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains braces
[INFO] [stderr]    --> src/trace/trace_state.rs:120:51
[INFO] [stderr]     |
[INFO] [stderr] 120 |     }), "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stderr]     |                                                   ^                             ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]     |
[INFO] [stderr] 120 |     }), "{}", "Key cannot contain characters outside of {'a'-'z', '0'-'9', _, -, *, / }");
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stderr]   --> src/trace/span.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub trait Span: Drop {
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(drop_bounds)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on `Self: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stderr]  --> src/context/mod.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait Scope: Drop {
[INFO] [stderr]   |                  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `opentelemetry_api` (lib) generated 12 warnings
[INFO] [stderr] warning: unused variable: `counter`
[INFO] [stderr]    --> src/metric/meter.rs:189:13
[INFO] [stderr]     |
[INFO] [stderr] 189 |         let counter = m.counter_long("test").build().unwrap();
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_counter`
[INFO] [stderr] 
[INFO] [stderr] warning: `opentelemetry_api` (lib test) generated 13 warnings (12 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/opentelemetry_api-ab644c32fefdba47)
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test resource::tests::test_create_macro ... ok
[INFO] [stdout] test metric::test::test_x ... ok
[INFO] [stdout] test resource::tests::test_labels ... ok
[INFO] [stdout] test trace::attribute_value::tests::test_str_from ... ok
[INFO] [stdout] test resource::tests::test_create ... ok
[INFO] [stdout] test metric::meter::tests::test_noops ... ok
[INFO] [stdout] test resource::tests::test_merge_resources ... ok
[INFO] [stdout] test trace::trace_state::test::test_validate_key_incorrect_alphabet - should panic ... ok
[INFO] [stdout] test trace::trace_state::test::test_validate_value_incorrect_alphabets - should panic ... ok
[INFO] [stdout] test distributedcontext::entry::tests::test_invalid_entry_key - should panic ... ok
[INFO] [stdout] test internal::tests::test_internal_validate_str - should panic ... ok
[INFO] [stdout] test resource::tests::test_invalid_resource_key_ascii - should panic ... ok
[INFO] [stdout] test trace::trace_state::test::test_validate_key_correct_alphabet ... ok
[INFO] [stdout] test resource::tests::test_invalud_resource_value_ascii - should panic ... ok
[INFO] [stdout] test trace::trace_state::test::test_validate_value_correct_alphabet ... ok
[INFO] [stdout] test distributedcontext::entry::tests::test_invalid_entry_key_len - should panic ... ok
[INFO] [stdout] test internal::tests::test_internal_validate_str_len - should panic ... ok
[INFO] [stdout] test trace::trace_state::test::test_validate_key_alphabets_too_long - should panic ... ok
[INFO] [stdout] test resource::tests::test_invalud_resource_value_len - should panic ... ok
[INFO] [stdout] test resource::tests::test_invalid_resource_key_len - should panic ... ok
[INFO] [stdout] test trace::trace_state::test::test_validate_value_alphabets_too_long - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 12.17s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests opentelemetry_api
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/metric/meter.rs - metric::meter::Meter (line 23) ... ok
[INFO] [stdout] test src/metric/meter.rs - metric::meter::Meter (line 45) ... ok
[INFO] [stdout] test src/metric/meter.rs - metric::meter::Meter (line 78) ... ok
[INFO] [stdout] test src/resource.rs - resource (line 109) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.82s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7497b02f63eff2a48b8b0d2754fe6ee8e086ceb435c1ff11eafce4613378170c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7497b02f63eff2a48b8b0d2754fe6ee8e086ceb435c1ff11eafce4613378170c", kill_on_drop: false }`
[INFO] [stdout] 7497b02f63eff2a48b8b0d2754fe6ee8e086ceb435c1ff11eafce4613378170c
