[INFO] cloning repository https://github.com/rutaihwa/03_random-values
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rutaihwa/03_random-values" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frutaihwa%2F03_random-values", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frutaihwa%2F03_random-values'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc71cbe15aa160906609ed1b2b349d9dbcd38c97
[INFO] checking rutaihwa/03_random-values against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frutaihwa%2F03_random-values" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rutaihwa/03_random-values 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/rutaihwa/03_random-values
[INFO] finished tweaking git repo https://github.com/rutaihwa/03_random-values
[INFO] tweaked toml for git repo https://github.com/rutaihwa/03_random-values written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rutaihwa/03_random-values 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pretty_env_logger v0.2.5
[INFO] [stderr]   Downloaded syn v1.0.7
[INFO] [stderr]   Downloaded synstructure v0.12.1
[INFO] [stderr]   Downloaded indexmap v1.3.0
[INFO] [stderr]   Downloaded http v0.1.19
[INFO] [stderr]   Downloaded tokio-reactor v0.1.10
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 70a4042e73ee6fbb522cb82d190cb886b499d338ca2fd478ee44d3bcd7d0c83c
[INFO] running `Command { std: "docker" "start" "-a" "70a4042e73ee6fbb522cb82d190cb886b499d338ca2fd478ee44d3bcd7d0c83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70a4042e73ee6fbb522cb82d190cb886b499d338ca2fd478ee44d3bcd7d0c83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70a4042e73ee6fbb522cb82d190cb886b499d338ca2fd478ee44d3bcd7d0c83c", kill_on_drop: false }`
[INFO] [stdout] 70a4042e73ee6fbb522cb82d190cb886b499d338ca2fd478ee44d3bcd7d0c83c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 9a7249c2388fe95e2151f52ecdbc06dcae445004497df276f2b75cbbfbbce66f
[INFO] running `Command { std: "docker" "start" "-a" "9a7249c2388fe95e2151f52ecdbc06dcae445004497df276f2b75cbbfbbce66f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking tokio-sync v0.1.7
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking pretty_env_logger v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking dotenv v0.13.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking random_values v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 39.71s
[INFO] running `Command { std: "docker" "inspect" "9a7249c2388fe95e2151f52ecdbc06dcae445004497df276f2b75cbbfbbce66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a7249c2388fe95e2151f52ecdbc06dcae445004497df276f2b75cbbfbbce66f", kill_on_drop: false }`
[INFO] [stdout] 9a7249c2388fe95e2151f52ecdbc06dcae445004497df276f2b75cbbfbbce66f
[INFO] checking rutaihwa/03_random-values against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frutaihwa%2F03_random-values" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rutaihwa/03_random-values 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/rutaihwa/03_random-values
[INFO] finished tweaking git repo https://github.com/rutaihwa/03_random-values
[INFO] tweaked toml for git repo https://github.com/rutaihwa/03_random-values written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/rutaihwa/03_random-values 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] e614dcf3aeb7793d8678fb83ecd2242fadb2bf2550fbad8cf5571840f32417d7
[INFO] running `Command { std: "docker" "start" "-a" "e614dcf3aeb7793d8678fb83ecd2242fadb2bf2550fbad8cf5571840f32417d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e614dcf3aeb7793d8678fb83ecd2242fadb2bf2550fbad8cf5571840f32417d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e614dcf3aeb7793d8678fb83ecd2242fadb2bf2550fbad8cf5571840f32417d7", kill_on_drop: false }`
[INFO] [stdout] e614dcf3aeb7793d8678fb83ecd2242fadb2bf2550fbad8cf5571840f32417d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ef5eaad37227cd2f9121122c1d9cc427ca5f5966af6dd71e6a38e154c3edc14b
[INFO] running `Command { std: "docker" "start" "-a" "ef5eaad37227cd2f9121122c1d9cc427ca5f5966af6dd71e6a38e154c3edc14b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking tokio-sync v0.1.7
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking pretty_env_logger v0.2.5
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking dotenv v0.13.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking random_values v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 41.08s
[INFO] running `Command { std: "docker" "inspect" "ef5eaad37227cd2f9121122c1d9cc427ca5f5966af6dd71e6a38e154c3edc14b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef5eaad37227cd2f9121122c1d9cc427ca5f5966af6dd71e6a38e154c3edc14b", kill_on_drop: false }`
[INFO] [stdout] ef5eaad37227cd2f9121122c1d9cc427ca5f5966af6dd71e6a38e154c3edc14b