[INFO] crate proptest 0.9.6 is already in cache
[INFO] checking proptest-0.9.6 against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] extracting crate proptest 0.9.6 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate proptest 0.9.6 on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate proptest 0.9.6
[INFO] finished tweaking crates.io crate proptest 0.9.6
[INFO] tweaked toml for crates.io crate proptest 0.9.6 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate proptest 0.9.6 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ad9d1637b8f5a70d0121020432c167759c85605a881e2b41e660f45080863497
[INFO] running `"docker" "start" "-a" "ad9d1637b8f5a70d0121020432c167759c85605a881e2b41e660f45080863497"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking proptest v0.9.6 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary braces around block return value
[INFO] [stderr]    --> src/test_runner/config.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 |         { contextualize_config(default_default_config()) };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around block return value
[INFO] [stderr]    --> src/test_runner/config.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 |         { contextualize_config(default_default_config()) };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::mem::replace` that must be used
[INFO] [stderr]   --> src/strategy/lazy.rs:83:25
[INFO] [stderr]    |
[INFO] [stderr] 83 | /                         mem::replace(
[INFO] [stderr] 84 | |                             &mut self.state,
[INFO] [stderr] 85 | |                             LazyValueTreeState::Initialized(v),
[INFO] [stderr] 86 | |                         );
[INFO] [stderr]    | |__________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::mem::replace` that must be used
[INFO] [stderr]   --> src/strategy/lazy.rs:83:25
[INFO] [stderr]    |
[INFO] [stderr] 83 | /                         mem::replace(
[INFO] [stderr] 84 | |                             &mut self.state,
[INFO] [stderr] 85 | |                             LazyValueTreeState::Initialized(v),
[INFO] [stderr] 86 | |                         );
[INFO] [stderr]    | |__________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.22s
[INFO] running `"docker" "inspect" "ad9d1637b8f5a70d0121020432c167759c85605a881e2b41e660f45080863497"`
[INFO] running `"docker" "rm" "-f" "ad9d1637b8f5a70d0121020432c167759c85605a881e2b41e660f45080863497"`
[INFO] [stdout] ad9d1637b8f5a70d0121020432c167759c85605a881e2b41e660f45080863497