[INFO] fetching crate histo_fp 0.2.1...
[INFO] testing histo_fp-0.2.1 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate histo_fp 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate histo_fp 0.2.1
[INFO] finished tweaking crates.io crate histo_fp 0.2.1
[INFO] tweaked toml for crates.io crate histo_fp 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate histo_fp 0.2.1 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate histo_fp 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quickcheck v0.4.1
[INFO] [stderr]   Downloaded noisy_float v0.1.12
[INFO] [stderr]   Downloaded streaming-stats v0.1.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72a0524bdefacdf193630ea1fdc1968c1b4e3f9f32b4a54288ac2f9afe017966
[INFO] running `Command { std: "docker" "start" "-a" "72a0524bdefacdf193630ea1fdc1968c1b4e3f9f32b4a54288ac2f9afe017966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72a0524bdefacdf193630ea1fdc1968c1b4e3f9f32b4a54288ac2f9afe017966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72a0524bdefacdf193630ea1fdc1968c1b4e3f9f32b4a54288ac2f9afe017966", kill_on_drop: false }`
[INFO] [stdout] 72a0524bdefacdf193630ea1fdc1968c1b4e3f9f32b4a54288ac2f9afe017966
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed8ebf2be859134fc161b8c22359bd43abb071e3af4619b2e210447cd42e0507
[INFO] running `Command { std: "docker" "start" "-a" "ed8ebf2be859134fc161b8c22359bd43abb071e3af4619b2e210447cd42e0507", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling noisy_float v0.1.12
[INFO] [stderr]    Compiling streaming-stats v0.1.29
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling histo_fp v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `precision` is never read
[INFO] [stdout]   --> src/lib.rs:84:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub struct Histogram {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 83 |     num_buckets: u64,
[INFO] [stdout] 84 |     precision: u32,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Histogram` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn buckets(&self) -> Buckets {
[INFO] [stdout]     |                    ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn buckets(&self) -> Buckets<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.35s
[INFO] running `Command { std: "docker" "inspect" "ed8ebf2be859134fc161b8c22359bd43abb071e3af4619b2e210447cd42e0507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed8ebf2be859134fc161b8c22359bd43abb071e3af4619b2e210447cd42e0507", kill_on_drop: false }`
[INFO] [stdout] ed8ebf2be859134fc161b8c22359bd43abb071e3af4619b2e210447cd42e0507
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3a4448fbd045f89bf693a2ce190d3184774bb8a238602cc5e1b9ce11f496ce8
[INFO] running `Command { std: "docker" "start" "-a" "a3a4448fbd045f89bf693a2ce190d3184774bb8a238602cc5e1b9ce11f496ce8", kill_on_drop: false }`
[INFO] [stdout] warning: field `precision` is never read
[INFO] [stdout]   --> src/lib.rs:84:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub struct Histogram {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 83 |     num_buckets: u64,
[INFO] [stdout] 84 |     precision: u32,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Histogram` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling histo_fp v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn buckets(&self) -> Buckets {
[INFO] [stdout]     |                    ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn buckets(&self) -> Buckets<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `precision` is never read
[INFO] [stdout]   --> src/lib.rs:84:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub struct Histogram {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 83 |     num_buckets: u64,
[INFO] [stdout] 84 |     precision: u32,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Histogram` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn buckets(&self) -> Buckets {
[INFO] [stdout]     |                    ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn buckets(&self) -> Buckets<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "a3a4448fbd045f89bf693a2ce190d3184774bb8a238602cc5e1b9ce11f496ce8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3a4448fbd045f89bf693a2ce190d3184774bb8a238602cc5e1b9ce11f496ce8", kill_on_drop: false }`
[INFO] [stdout] a3a4448fbd045f89bf693a2ce190d3184774bb8a238602cc5e1b9ce11f496ce8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7b0bfabf1b4454a9900c93661c3521fff2fdf3058957956498d5a7d386d2d131
[INFO] running `Command { std: "docker" "start" "-a" "7b0bfabf1b4454a9900c93661c3521fff2fdf3058957956498d5a7d386d2d131", kill_on_drop: false }`
[INFO] [stderr] warning: field `precision` is never read
[INFO] [stderr]   --> src/lib.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 82 | pub struct Histogram {
[INFO] [stderr]    |            --------- field in this struct
[INFO] [stderr] 83 |     num_buckets: u64,
[INFO] [stderr] 84 |     precision: u32,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Histogram` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:118:20
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn buckets(&self) -> Buckets {
[INFO] [stderr]     |                    ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                    |
[INFO] [stderr]     |                    the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn buckets(&self) -> Buckets<'_> {
[INFO] [stderr]     |                                     ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `histo_fp` (lib) generated 2 warnings (run `cargo fix --lib -p histo_fp` to apply 1 suggestion)
[INFO] [stderr] warning: `histo_fp` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/histo_fp-a4b1ff5449cb3620)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::bucket_count ... ok
[INFO] [stdout] test tests::add ... ok
[INFO] [stdout] test tests::bucket_count_one ... ok
[INFO] [stdout] test tests::num_buckets ... ok
[INFO] [stdout] test tests::overflow_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/histo_fp.rs (/opt/rustwide/target/debug/deps/histo_fp-723b8d443fe95ca1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests histo_fp
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 12) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7b0bfabf1b4454a9900c93661c3521fff2fdf3058957956498d5a7d386d2d131", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b0bfabf1b4454a9900c93661c3521fff2fdf3058957956498d5a7d386d2d131", kill_on_drop: false }`
[INFO] [stdout] 7b0bfabf1b4454a9900c93661c3521fff2fdf3058957956498d5a7d386d2d131