[INFO] fetching crate rgch 0.1.33...
[INFO] checking rgch-0.1.33 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rgch 0.1.33 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate rgch 0.1.33 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 crates.io crate rgch 0.1.33
[INFO] finished tweaking crates.io crate rgch 0.1.33
[INFO] tweaked toml for crates.io crate rgch 0.1.33 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate rgch 0.1.33 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 proc-macro2 v1.0.7
[INFO] [stderr]   Downloaded termion v1.5.4
[INFO] [stderr]   Downloaded num-traits v0.2.10
[INFO] [stderr]   Downloaded syn v1.0.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 30b07c831feb686edb42b6be8df3601a1bf4a608a3ee19fb3764c91494239381
[INFO] running `Command { std: "docker" "start" "-a" "30b07c831feb686edb42b6be8df3601a1bf4a608a3ee19fb3764c91494239381", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30b07c831feb686edb42b6be8df3601a1bf4a608a3ee19fb3764c91494239381", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30b07c831feb686edb42b6be8df3601a1bf4a608a3ee19fb3764c91494239381", kill_on_drop: false }`
[INFO] [stdout] 30b07c831feb686edb42b6be8df3601a1bf4a608a3ee19fb3764c91494239381
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] d9248fbe3081f6b903d2cc92850779deaaec6971d1259d6cf16352c3657c8e47
[INFO] running `Command { std: "docker" "start" "-a" "d9248fbe3081f6b903d2cc92850779deaaec6971d1259d6cf16352c3657c8e47", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling syn v1.0.12
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking termion v1.5.4
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]     Checking rgch v0.1.33 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:335:9
[INFO] [stdout]     |
[INFO] [stdout] 335 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:335:9
[INFO] [stdout]     |
[INFO] [stdout] 335 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.86s
[INFO] running `Command { std: "docker" "inspect" "d9248fbe3081f6b903d2cc92850779deaaec6971d1259d6cf16352c3657c8e47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9248fbe3081f6b903d2cc92850779deaaec6971d1259d6cf16352c3657c8e47", kill_on_drop: false }`
[INFO] [stdout] d9248fbe3081f6b903d2cc92850779deaaec6971d1259d6cf16352c3657c8e47
[INFO] checking rgch-0.1.33 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rgch 0.1.33 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate rgch 0.1.33 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 crates.io crate rgch 0.1.33
[INFO] finished tweaking crates.io crate rgch 0.1.33
[INFO] tweaked toml for crates.io crate rgch 0.1.33 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate rgch 0.1.33 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a8925686c1bc243079874f1c15f8ef92b8a074b20799fe7cb8eed2b5aee26a4e
[INFO] running `Command { std: "docker" "start" "-a" "a8925686c1bc243079874f1c15f8ef92b8a074b20799fe7cb8eed2b5aee26a4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8925686c1bc243079874f1c15f8ef92b8a074b20799fe7cb8eed2b5aee26a4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8925686c1bc243079874f1c15f8ef92b8a074b20799fe7cb8eed2b5aee26a4e", kill_on_drop: false }`
[INFO] [stdout] a8925686c1bc243079874f1c15f8ef92b8a074b20799fe7cb8eed2b5aee26a4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] bf742f0a8fee2be4c35be116ac68abb7be401a016c924f72eb591128cbcd5bae
[INFO] running `Command { std: "docker" "start" "-a" "bf742f0a8fee2be4c35be116ac68abb7be401a016c924f72eb591128cbcd5bae", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling syn v1.0.12
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking termion v1.5.4
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]     Checking rgch v0.1.33 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:335:9
[INFO] [stdout]     |
[INFO] [stdout] 335 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/arg.rs:335:9
[INFO] [stdout]     |
[INFO] [stdout] 335 |     for mut opt in options.iter_mut() {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.98s
[INFO] running `Command { std: "docker" "inspect" "bf742f0a8fee2be4c35be116ac68abb7be401a016c924f72eb591128cbcd5bae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf742f0a8fee2be4c35be116ac68abb7be401a016c924f72eb591128cbcd5bae", kill_on_drop: false }`
[INFO] [stdout] bf742f0a8fee2be4c35be116ac68abb7be401a016c924f72eb591128cbcd5bae