[INFO] crate proptest 0.9.6 is already in cache
[INFO] testing proptest-0.9.6 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate proptest 0.9.6 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate proptest 0.9.6 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "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-0/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" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stdout] f5d39abcb35b0eb0adb88d1f1a08ae7224a7b242884430c0fff74cdd823a6b3c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "f5d39abcb35b0eb0adb88d1f1a08ae7224a7b242884430c0fff74cdd823a6b3c"`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling rusty-fork v0.2.2
[INFO] [stderr]    Compiling 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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.00s
[INFO] running `"docker" "inspect" "f5d39abcb35b0eb0adb88d1f1a08ae7224a7b242884430c0fff74cdd823a6b3c"`
[INFO] running `"docker" "rm" "-f" "f5d39abcb35b0eb0adb88d1f1a08ae7224a7b242884430c0fff74cdd823a6b3c"`
[INFO] [stdout] f5d39abcb35b0eb0adb88d1f1a08ae7224a7b242884430c0fff74cdd823a6b3c
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4bfe5be019586b75f989dba33e33d0ef5500332114b86a10a52b77ab151b7de9
[INFO] running `"docker" "start" "-a" "4bfe5be019586b75f989dba33e33d0ef5500332114b86a10a52b77ab151b7de9"`
[INFO] [stderr]    Compiling regex v1.3.6
[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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]    Compiling 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] error: could not compile `proptest`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name proptest --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -C debuginfo=2 --test --cfg 'feature="bit-set"' --cfg 'feature="break-dead-code"' --cfg 'feature="default"' --cfg 'feature="fork"' --cfg 'feature="lazy_static"' --cfg 'feature="quick-error"' --cfg 'feature="regex-syntax"' --cfg 'feature="rusty-fork"' --cfg 'feature="std"' --cfg 'feature="tempfile"' --cfg 'feature="timeout"' -C metadata=197e00842957690b -C extra-filename=-197e00842957690b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bit_set=/opt/rustwide/target/debug/deps/libbit_set-f2b3427e4674fbf5.rlib --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-c5180c3dc5cc8193.rlib --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-9e7c8838d51ecb2e.rlib --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-81e71b56f2a8a8f3.rlib --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-03e1b0a9b7b5dfc0.rlib --extern quick_error=/opt/rustwide/target/debug/deps/libquick_error-c339d616bf8720e1.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-330b5f5f6e2a5a99.rlib --extern rand_chacha=/opt/rustwide/target/debug/deps/librand_chacha-35312d40afb18cd1.rlib --extern rand_xorshift=/opt/rustwide/target/debug/deps/librand_xorshift-c620f8c8363fcd13.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-f71cf21e02b6b1c6.rlib --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-895f7b6116abae12.rlib --extern rusty_fork=/opt/rustwide/target/debug/deps/librusty_fork-71cf98da4016aefe.rlib --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-20d76dc5d3e66ee6.rlib --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "4bfe5be019586b75f989dba33e33d0ef5500332114b86a10a52b77ab151b7de9"`
[INFO] running `"docker" "rm" "-f" "4bfe5be019586b75f989dba33e33d0ef5500332114b86a10a52b77ab151b7de9"`
[INFO] [stdout] 4bfe5be019586b75f989dba33e33d0ef5500332114b86a10a52b77ab151b7de9