[INFO] cloning repository https://github.com/wangchen000/snowflake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wangchen000/snowflake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangchen000%2Fsnowflake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangchen000%2Fsnowflake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 019277e70e2cebc2bbceed27de696ece1dbbff18
[INFO] checking wangchen000/snowflake against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangchen000%2Fsnowflake" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangchen000/snowflake on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangchen000/snowflake
[INFO] finished tweaking git repo https://github.com/wangchen000/snowflake
[INFO] tweaked toml for git repo https://github.com/wangchen000/snowflake written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wangchen000/snowflake 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca08c6bcb72e29d675c6c508253c135775708a4da589732b8bfe1a7134bc28e6
[INFO] running `Command { std: "docker" "start" "-a" "ca08c6bcb72e29d675c6c508253c135775708a4da589732b8bfe1a7134bc28e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca08c6bcb72e29d675c6c508253c135775708a4da589732b8bfe1a7134bc28e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca08c6bcb72e29d675c6c508253c135775708a4da589732b8bfe1a7134bc28e6", kill_on_drop: false }`
[INFO] [stdout] ca08c6bcb72e29d675c6c508253c135775708a4da589732b8bfe1a7134bc28e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8e80178ce5f74b9d232a1275d5abec195b00038a3af913d2d4911187cb2c54b
[INFO] running `Command { std: "docker" "start" "-a" "b8e80178ce5f74b9d232a1275d5abec195b00038a3af913d2d4911187cb2c54b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking snowflake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Snowflake` is never constructed
[INFO] [stdout]  --> src/snowflake.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Snowflake {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `kubernetes`, `new`, `generate`, and `get_time` are never used
[INFO] [stdout]   --> src/snowflake.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Snowflake {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn kubernetes() -> Snowflake {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn new(worker_id: i64) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn generate(&mut self) -> Option<i64> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn get_time(&self) -> i64 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ip` is never used
[INFO] [stdout]   --> src/snowflake.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn get_ip() -> Option<String> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/snowflake.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Snowflake {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn new(worker_id: i64) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.68s
[INFO] running `Command { std: "docker" "inspect" "b8e80178ce5f74b9d232a1275d5abec195b00038a3af913d2d4911187cb2c54b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8e80178ce5f74b9d232a1275d5abec195b00038a3af913d2d4911187cb2c54b", kill_on_drop: false }`
[INFO] [stdout] b8e80178ce5f74b9d232a1275d5abec195b00038a3af913d2d4911187cb2c54b
[INFO] checking wangchen000/snowflake against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangchen000%2Fsnowflake" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangchen000/snowflake on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangchen000/snowflake
[INFO] finished tweaking git repo https://github.com/wangchen000/snowflake
[INFO] tweaked toml for git repo https://github.com/wangchen000/snowflake written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wangchen000/snowflake 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3294f937720363a6414a6690314d845521632a8ae7d627a0cd72ffb7b8794043
[INFO] running `Command { std: "docker" "start" "-a" "3294f937720363a6414a6690314d845521632a8ae7d627a0cd72ffb7b8794043", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3294f937720363a6414a6690314d845521632a8ae7d627a0cd72ffb7b8794043", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3294f937720363a6414a6690314d845521632a8ae7d627a0cd72ffb7b8794043", kill_on_drop: false }`
[INFO] [stdout] 3294f937720363a6414a6690314d845521632a8ae7d627a0cd72ffb7b8794043
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3153d0460b6c2edc16dd0294a99c3e48fa5c693359e046f5349c10ddf86f2046
[INFO] running `Command { std: "docker" "start" "-a" "3153d0460b6c2edc16dd0294a99c3e48fa5c693359e046f5349c10ddf86f2046", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking snowflake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Snowflake` is never constructed
[INFO] [stdout]  --> src/snowflake.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Snowflake {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `kubernetes`, `new`, `generate`, and `get_time` are never used
[INFO] [stdout]   --> src/snowflake.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Snowflake {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn kubernetes() -> Snowflake {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn new(worker_id: i64) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn generate(&mut self) -> Option<i64> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn get_time(&self) -> i64 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ip` is never used
[INFO] [stdout]   --> src/snowflake.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn get_ip() -> Option<String> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/snowflake.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Snowflake {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn new(worker_id: i64) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.36s
[INFO] running `Command { std: "docker" "inspect" "3153d0460b6c2edc16dd0294a99c3e48fa5c693359e046f5349c10ddf86f2046", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3153d0460b6c2edc16dd0294a99c3e48fa5c693359e046f5349c10ddf86f2046", kill_on_drop: false }`
[INFO] [stdout] 3153d0460b6c2edc16dd0294a99c3e48fa5c693359e046f5349c10ddf86f2046