[INFO] fetching crate proptest 1.0.0...
[INFO] checking proptest-1.0.0 against try#56723e30e40b52b73b9722d31caeec71c84a0ed4 for pr-98370
[INFO] extracting crate proptest 1.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate proptest 1.0.0 on toolchain 56723e30e40b52b73b9722d31caeec71c84a0ed4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+56723e30e40b52b73b9722d31caeec71c84a0ed4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proptest 1.0.0
[INFO] finished tweaking crates.io crate proptest 1.0.0
[INFO] tweaked toml for crates.io crate proptest 1.0.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate proptest 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+56723e30e40b52b73b9722d31caeec71c84a0ed4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+56723e30e40b52b73b9722d31caeec71c84a0ed4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83d8c9668bdf74e015d7ac99f9ed0f8f5fe7278d8c4f5ab6ff92e75c0ca36ad3
[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" "83d8c9668bdf74e015d7ac99f9ed0f8f5fe7278d8c4f5ab6ff92e75c0ca36ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83d8c9668bdf74e015d7ac99f9ed0f8f5fe7278d8c4f5ab6ff92e75c0ca36ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83d8c9668bdf74e015d7ac99f9ed0f8f5fe7278d8c4f5ab6ff92e75c0ca36ad3", kill_on_drop: false }`
[INFO] [stdout] 83d8c9668bdf74e015d7ac99f9ed0f8f5fe7278d8c4f5ab6ff92e75c0ca36ad3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+56723e30e40b52b73b9722d31caeec71c84a0ed4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d476243ea70e789a3a23ead2efb7aef41abc03cbbe27a53ec1fc5cd17db65a2
[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" "6d476243ea70e789a3a23ead2efb7aef41abc03cbbe27a53ec1fc5cd17db65a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking quick-error v2.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.45s
[INFO] running `Command { std: "docker" "inspect" "6d476243ea70e789a3a23ead2efb7aef41abc03cbbe27a53ec1fc5cd17db65a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d476243ea70e789a3a23ead2efb7aef41abc03cbbe27a53ec1fc5cd17db65a2", kill_on_drop: false }`
[INFO] [stdout] 6d476243ea70e789a3a23ead2efb7aef41abc03cbbe27a53ec1fc5cd17db65a2