[INFO] cloning repository https://github.com/erik-helmers/Rost
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erik-helmers/Rost" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik-helmers%2FRost", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik-helmers%2FRost'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc0805537784c53b3a1af500ce7a12deb49f7de3
[INFO] checking erik-helmers/Rost against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik-helmers%2FRost" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erik-helmers/Rost on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/erik-helmers/Rost
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/erik-helmers/Rost
[INFO] tweaked toml for git repo https://github.com/erik-helmers/Rost written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/erik-helmers/Rost already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pin-project-internal v0.4.23
[INFO] [stderr]   Downloaded cpuio v0.3.0
[INFO] [stderr]   Downloaded lock_api v0.3.4
[INFO] [stderr]   Downloaded uart_16550 v0.2.7
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded syn v1.0.36
[INFO] [stderr]   Downloaded pc-keyboard v0.5.1
[INFO] [stderr]   Downloaded linked_list_allocator v0.8.4
[INFO] [stderr]   Downloaded x86_64 v0.11.8
[INFO] [stderr]   Downloaded crossbeam-queue v0.2.3
[INFO] [stderr]   Downloaded conquer-once v0.2.1
[INFO] [stderr]   Downloaded pin-project v0.4.23
[INFO] [stderr]   Downloaded volatile v0.3.0
[INFO] [stderr]   Downloaded bootloader v0.9.8
[INFO] [stderr]   Downloaded rlibc v1.0.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.19
[INFO] [stderr]   Downloaded spinning_top v0.1.1
[INFO] [stderr]   Downloaded pic8259_simple v0.2.0
[INFO] [stderr]   Downloaded conquer-util v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4bc0444ca634d73e7e6ee9a5993ae158a39788a4a19c25c5b8333f30602d3f16
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4bc0444ca634d73e7e6ee9a5993ae158a39788a4a19c25c5b8333f30602d3f16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bc0444ca634d73e7e6ee9a5993ae158a39788a4a19c25c5b8333f30602d3f16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bc0444ca634d73e7e6ee9a5993ae158a39788a4a19c25c5b8333f30602d3f16", kill_on_drop: false }`
[INFO] [stdout] 4bc0444ca634d73e7e6ee9a5993ae158a39788a4a19c25c5b8333f30602d3f16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3d4ad3c90fcb1c585a63ab288fb5c9513ac57b4f9ea7d56c625df6b4571c5bb
[INFO] running `Command { std: "docker" "start" "-a" "f3d4ad3c90fcb1c585a63ab288fb5c9513ac57b4f9ea7d56c625df6b4571c5bb", kill_on_drop: false }`
[INFO] [stderr] error: "/opt/rustwide/rustup-home/toolchains/b2f80f6008cdafc35b4472bd46afa16cc6b0cd63/lib/rustlib/src/rust/Cargo.lock" does not exist, unable to build with the standard library, try:
[INFO] [stderr]         rustup component add rust-src
[INFO] running `Command { std: "docker" "inspect" "f3d4ad3c90fcb1c585a63ab288fb5c9513ac57b4f9ea7d56c625df6b4571c5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3d4ad3c90fcb1c585a63ab288fb5c9513ac57b4f9ea7d56c625df6b4571c5bb", kill_on_drop: false }`
[INFO] [stdout] f3d4ad3c90fcb1c585a63ab288fb5c9513ac57b4f9ea7d56c625df6b4571c5bb