[INFO] fetching crate proptest 0.10.1...
[INFO] testing proptest-0.10.1 against 1.47.0 for beta-1.48-1
[INFO] extracting crate proptest 0.10.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate proptest 0.10.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proptest 0.10.1
[INFO] finished tweaking crates.io crate proptest 0.10.1
[INFO] tweaked toml for crates.io crate proptest 0.10.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate proptest 0.10.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c0f3146d30399e0576f44e3760195afcbe9c1a62f04e4696066ca55a2d93431
[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" "0c0f3146d30399e0576f44e3760195afcbe9c1a62f04e4696066ca55a2d93431", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c0f3146d30399e0576f44e3760195afcbe9c1a62f04e4696066ca55a2d93431", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c0f3146d30399e0576f44e3760195afcbe9c1a62f04e4696066ca55a2d93431", kill_on_drop: false }`
[INFO] [stdout] 0c0f3146d30399e0576f44e3760195afcbe9c1a62f04e4696066ca55a2d93431
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a124a577e43f7a9dfbffa5ca732ba6534bb40a4ed3b5f727e5559ea798911bd3
[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" "a124a577e43f7a9dfbffa5ca732ba6534bb40a4ed3b5f727e5559ea798911bd3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v0.10.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.31s
[INFO] running `Command { std: "docker" "inspect" "a124a577e43f7a9dfbffa5ca732ba6534bb40a4ed3b5f727e5559ea798911bd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a124a577e43f7a9dfbffa5ca732ba6534bb40a4ed3b5f727e5559ea798911bd3", kill_on_drop: false }`
[INFO] [stdout] a124a577e43f7a9dfbffa5ca732ba6534bb40a4ed3b5f727e5559ea798911bd3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--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] def85d2ecab0f00162c406e7c968cb1480bac0defe892fd930fda214a692b897
[INFO] running `Command { std: "docker" "start" "-a" "def85d2ecab0f00162c406e7c968cb1480bac0defe892fd930fda214a692b897", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling proptest v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `impl strategy::traits::Strategy`, which is not FFI-safe
[INFO] [stdout]     --> src/sugar.rs:618:21
[INFO] [stdout]      |
[INFO] [stdout] 618  |                    -> impl $crate::strategy::Strategy<Value = $return_type> {
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 1170 | /     prop_compose! {
[INFO] [stdout] 1171 | |         /// These are docs!
[INFO] [stdout] 1172 | |         #[allow(dead_code)]
[INFO] [stdout] 1173 | |         pub [extern "C"] fn two_ints_pub_with_attrs
[INFO] [stdout] ...    |
[INFO] [stdout] 1178 | |         }
[INFO] [stdout] 1179 | |     }
[INFO] [stdout]      | |_____- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]      = note: opaque types have no C equivalent
[INFO] [stdout]      = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `impl strategy::traits::Strategy`, which is not FFI-safe
[INFO] [stdout]     --> src/sugar.rs:618:21
[INFO] [stdout]      |
[INFO] [stdout] 618  |                    -> impl $crate::strategy::Strategy<Value = $return_type> {
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 1181 | /     prop_compose! {
[INFO] [stdout] 1182 | |         // The only modifier we can usefully put here is "unsafe", but we want
[INFO] [stdout] 1183 | |         // to keep this crate unsafe-free, even nominally. "const" may
[INFO] [stdout] 1184 | |         // eventually work, but is not allowed right now since the generated
[INFO] [stdout] ...    |
[INFO] [stdout] 1190 | |         }
[INFO] [stdout] 1191 | |     }
[INFO] [stdout]      | |_____- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: opaque types have no C equivalent
[INFO] [stdout]      = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[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 embed-bitcode=no -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=284565b350180c75 -C extra-filename=-284565b350180c75 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bit_set=/opt/rustwide/target/debug/deps/libbit_set-0f027bbe9088639b.rlib --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-e8b42ad6d332332e.rlib --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-ff05f3130aafcffd.rlib --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-bf21cfb31a9e28ca.rlib --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-9f6ef42db889e004.rlib --extern quick_error=/opt/rustwide/target/debug/deps/libquick_error-f8f11c753de79890.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-19b8577f18e5631b.rlib --extern rand_chacha=/opt/rustwide/target/debug/deps/librand_chacha-a87b9784f0134db5.rlib --extern rand_xorshift=/opt/rustwide/target/debug/deps/librand_xorshift-edbe72efa53eca10.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-9ac6c83a17aa532b.rlib --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-4cec8b6c5863bb82.rlib --extern rusty_fork=/opt/rustwide/target/debug/deps/librusty_fork-189fe8b26138697d.rlib --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-effacd6448fed6b2.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "def85d2ecab0f00162c406e7c968cb1480bac0defe892fd930fda214a692b897", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "def85d2ecab0f00162c406e7c968cb1480bac0defe892fd930fda214a692b897", kill_on_drop: false }`
[INFO] [stdout] def85d2ecab0f00162c406e7c968cb1480bac0defe892fd930fda214a692b897
