[INFO] cloning repository https://github.com/xuorig/jeprof-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xuorig/jeprof-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuorig%2Fjeprof-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuorig%2Fjeprof-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7649ef4bee82bf01b4d3618ca1745765e9f35b5c
[INFO] checking xuorig/jeprof-rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuorig%2Fjeprof-rs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xuorig/jeprof-rs 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/xuorig/jeprof-rs
[INFO] finished tweaking git repo https://github.com/xuorig/jeprof-rs
[INFO] tweaked toml for git repo https://github.com/xuorig/jeprof-rs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/xuorig/jeprof-rs 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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] bd5692c3a78d150dcb724eb00e0580462472ee4ed5105bf2ed06c0ad7703343a
[INFO] running `Command { std: "docker" "start" "-a" "bd5692c3a78d150dcb724eb00e0580462472ee4ed5105bf2ed06c0ad7703343a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd5692c3a78d150dcb724eb00e0580462472ee4ed5105bf2ed06c0ad7703343a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd5692c3a78d150dcb724eb00e0580462472ee4ed5105bf2ed06c0ad7703343a", kill_on_drop: false }`
[INFO] [stdout] bd5692c3a78d150dcb724eb00e0580462472ee4ed5105bf2ed06c0ad7703343a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a1f0286d94cd9cf05c3993df7e7056c45671a9c13fdd53626f0fc9457721e0a6
[INFO] running `Command { std: "docker" "start" "-a" "a1f0286d94cd9cf05c3993df7e7056c45671a9c13fdd53626f0fc9457721e0a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling cpp_demangle v0.4.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking memmap2 v0.5.10
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking ruzstd v0.5.0
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]     Checking jeprof-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `first` and `last` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct MappedLibrary<'a> {
[INFO] [stdout]    |            ------------- fields in this struct
[INFO] [stdout] 53 |     first: i64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 54 |     last: i64,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MappedLibrary` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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 12.66s
[INFO] running `Command { std: "docker" "inspect" "a1f0286d94cd9cf05c3993df7e7056c45671a9c13fdd53626f0fc9457721e0a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1f0286d94cd9cf05c3993df7e7056c45671a9c13fdd53626f0fc9457721e0a6", kill_on_drop: false }`
[INFO] [stdout] a1f0286d94cd9cf05c3993df7e7056c45671a9c13fdd53626f0fc9457721e0a6
[INFO] checking xuorig/jeprof-rs against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuorig%2Fjeprof-rs" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xuorig/jeprof-rs 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/xuorig/jeprof-rs
[INFO] finished tweaking git repo https://github.com/xuorig/jeprof-rs
[INFO] tweaked toml for git repo https://github.com/xuorig/jeprof-rs written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/xuorig/jeprof-rs 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 9c2447eb2984f0354d6f079693d626526c312c9b6b857fc5763abf1bcaa712c2
[INFO] running `Command { std: "docker" "start" "-a" "9c2447eb2984f0354d6f079693d626526c312c9b6b857fc5763abf1bcaa712c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c2447eb2984f0354d6f079693d626526c312c9b6b857fc5763abf1bcaa712c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c2447eb2984f0354d6f079693d626526c312c9b6b857fc5763abf1bcaa712c2", kill_on_drop: false }`
[INFO] [stdout] 9c2447eb2984f0354d6f079693d626526c312c9b6b857fc5763abf1bcaa712c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] bbf935505ab58e94155b1bff070e8f004310f2a879faf84f4593056cb47f1196
[INFO] running `Command { std: "docker" "start" "-a" "bbf935505ab58e94155b1bff070e8f004310f2a879faf84f4593056cb47f1196", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling cpp_demangle v0.4.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking memmap2 v0.5.10
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking ruzstd v0.5.0
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]     Checking jeprof-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `first` and `last` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct MappedLibrary<'a> {
[INFO] [stdout]    |            ------------- fields in this struct
[INFO] [stdout] 53 |     first: i64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 54 |     last: i64,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MappedLibrary` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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 13.15s
[INFO] running `Command { std: "docker" "inspect" "bbf935505ab58e94155b1bff070e8f004310f2a879faf84f4593056cb47f1196", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbf935505ab58e94155b1bff070e8f004310f2a879faf84f4593056cb47f1196", kill_on_drop: false }`
[INFO] [stdout] bbf935505ab58e94155b1bff070e8f004310f2a879faf84f4593056cb47f1196