[INFO] cloning repository https://github.com/vrcod/rust-pi-approximation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vrcod/rust-pi-approximation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvrcod%2Frust-pi-approximation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvrcod%2Frust-pi-approximation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cdfb33f9acef6dfccd7619bcde367b3f804148df
[INFO] checking vrcod/rust-pi-approximation against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvrcod%2Frust-pi-approximation" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vrcod/rust-pi-approximation on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vrcod/rust-pi-approximation
[INFO] finished tweaking git repo https://github.com/vrcod/rust-pi-approximation
[INFO] tweaked toml for git repo https://github.com/vrcod/rust-pi-approximation written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/vrcod/rust-pi-approximation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-2/source/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-2/source/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d4bb8155a4538503e22b0e15ddb9f2cc719ee89c07cba29f4e0d6be83a1d558
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4d4bb8155a4538503e22b0e15ddb9f2cc719ee89c07cba29f4e0d6be83a1d558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d4bb8155a4538503e22b0e15ddb9f2cc719ee89c07cba29f4e0d6be83a1d558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d4bb8155a4538503e22b0e15ddb9f2cc719ee89c07cba29f4e0d6be83a1d558", kill_on_drop: false }`
[INFO] [stdout] 4d4bb8155a4538503e22b0e15ddb9f2cc719ee89c07cba29f4e0d6be83a1d558
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79ec5e634e0cef07a7915853a124fd1d6e8f0b3a19dcfc95d537fa30d26a72ca
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "79ec5e634e0cef07a7915853a124fd1d6e8f0b3a19dcfc95d537fa30d26a72ca", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling standback v0.2.13
[INFO] [stderr]    Compiling time v0.2.23
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking rust-stream v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]  --> src/bin/single_thread.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let start = time::precise_time_ns();
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> src/bin/single_thread.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 |     println!("Execution time:   {} ns", time::precise_time_ns() - start);
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]  --> src/bin/max_threads.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let start = time::precise_time_ns();
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> src/bin/max_threads.rs:30:38
[INFO] [stdout]    |
[INFO] [stdout] 30 |     println!("Execution time:   {} ns", time::precise_time_ns() - start);
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]  --> src/bin/max_threads.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let start = time::precise_time_ns();
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> src/bin/max_threads.rs:30:38
[INFO] [stdout]    |
[INFO] [stdout] 30 |     println!("Execution time:   {} ns", time::precise_time_ns() - start);
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]  --> src/bin/single_thread.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let start = time::precise_time_ns();
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> src/bin/single_thread.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 |     println!("Execution time:   {} ns", time::precise_time_ns() - start);
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]  --> src/bin/two_threads.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let start = time::precise_time_ns();
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> src/bin/two_threads.rs:40:38
[INFO] [stdout]    |
[INFO] [stdout] 40 |     println!("Execution time:   {} ns", time::precise_time_ns() - start);
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]  --> src/bin/two_threads.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let start = time::precise_time_ns();
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> src/bin/two_threads.rs:40:38
[INFO] [stdout]    |
[INFO] [stdout] 40 |     println!("Execution time:   {} ns", time::precise_time_ns() - start);
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/max_threads.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 |             task.send(p);
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/max_threads.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 |             task.send(p);
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/two_threads.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 |             task1.send(p);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/two_threads.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 |             task2.send(p);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/two_threads.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 |             task1.send(p);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/two_threads.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 |             task2.send(p);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.13s
[INFO] running `Command { std: "docker" "inspect" "79ec5e634e0cef07a7915853a124fd1d6e8f0b3a19dcfc95d537fa30d26a72ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79ec5e634e0cef07a7915853a124fd1d6e8f0b3a19dcfc95d537fa30d26a72ca", kill_on_drop: false }`
[INFO] [stdout] 79ec5e634e0cef07a7915853a124fd1d6e8f0b3a19dcfc95d537fa30d26a72ca