[INFO] fetching crate palaver 0.3.0-alpha.3...
[INFO] testing palaver-0.3.0-alpha.3 against 1.47.0 for beta-1.48-1
[INFO] extracting crate palaver 0.3.0-alpha.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate palaver 0.3.0-alpha.3 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 palaver 0.3.0-alpha.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate palaver 0.3.0-alpha.3
[INFO] tweaked toml for crates.io crate palaver 0.3.0-alpha.3 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate palaver 0.3.0-alpha.3 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5093dbff853f953e0ec536e5295e088a9ceef410c9cad3e64f417ee71fcbba6d
[INFO] running `Command { std: "docker" "start" "-a" "5093dbff853f953e0ec536e5295e088a9ceef410c9cad3e64f417ee71fcbba6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5093dbff853f953e0ec536e5295e088a9ceef410c9cad3e64f417ee71fcbba6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5093dbff853f953e0ec536e5295e088a9ceef410c9cad3e64f417ee71fcbba6d", kill_on_drop: false }`
[INFO] [stdout] 5093dbff853f953e0ec536e5295e088a9ceef410c9cad3e64f417ee71fcbba6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 997879f8afb2018373cb827027d29d1c16d0837926734c9e998e53a42754749c
[INFO] running `Command { std: "docker" "start" "-a" "997879f8afb2018373cb827027d29d1c16d0837926734c9e998e53a42754749c", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling heapless v0.5.3
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling hex v0.4.1
[INFO] [stderr]    Compiling twox-hash v1.5.0
[INFO] [stderr]    Compiling replace_with v0.1.5
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling libflate v0.1.27
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling generic-array v0.13.2
[INFO] [stderr]    Compiling as-slice v0.1.2
[INFO] [stderr]    Compiling procfs v0.7.7
[INFO] [stderr]    Compiling palaver v0.3.0-alpha.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.13s
[INFO] running `Command { std: "docker" "inspect" "997879f8afb2018373cb827027d29d1c16d0837926734c9e998e53a42754749c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "997879f8afb2018373cb827027d29d1c16d0837926734c9e998e53a42754749c", kill_on_drop: false }`
[INFO] [stdout] 997879f8afb2018373cb827027d29d1c16d0837926734c9e998e53a42754749c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 58cff9c1d90d6997732f35db2501e507d58e15a5e83f985b44c8916652f416ec
[INFO] running `Command { std: "docker" "start" "-a" "58cff9c1d90d6997732f35db2501e507d58e15a5e83f985b44c8916652f416ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling escargot v0.5.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde_json v1.0.47
[INFO] [stderr]    Compiling palaver v0.3.0-alpha.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 48.39s
[INFO] running `Command { std: "docker" "inspect" "58cff9c1d90d6997732f35db2501e507d58e15a5e83f985b44c8916652f416ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58cff9c1d90d6997732f35db2501e507d58e15a5e83f985b44c8916652f416ec", kill_on_drop: false }`
[INFO] [stdout] 58cff9c1d90d6997732f35db2501e507d58e15a5e83f985b44c8916652f416ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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", kill_on_drop: false }`
[INFO] [stdout] 78ea8f1eba7f24e05942548a2bebcf6c93bfe2f115b368445b92a74264dbc1ed
[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" "78ea8f1eba7f24e05942548a2bebcf6c93bfe2f115b368445b92a74264dbc1ed", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.27s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/palaver-53987f7702e925a2
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test thread::tests::count ... ignored
[INFO] [stdout] test process::tests::count ... ok
[INFO] [stdout] test env::tests::same ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/env-13c09105b7b44ca9
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test same_as_rust ... ok
[INFO] [stdout] test echo ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fd_iter-8746e37e95b3a47f
[INFO] [stdout] 0
[INFO] [stdout] 1
[INFO] [stdout] 2
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fork-84ad02f6bb3d648a
[INFO] [stdout] multithreaded
[INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', tests/fork.rs:170:38
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5614f28b1810 - std::backtrace_rs::backtrace::libunwind::trace::h577ea05e9ca4629a
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]    1:     0x5614f28b1810 - std::backtrace_rs::backtrace::trace_unsynchronized::h50b9b72b84c7dd56
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5614f28b1810 - std::sys_common::backtrace::_print_fmt::h6541cf9823837fac
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]    3:     0x5614f28b1810 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf64fbff071026df5
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]    4:     0x5614f28d042c - core::fmt::write::h9ddafa4860d8adff
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/fmt/mod.rs:1082
[INFO] [stderr]    5:     0x5614f28aeb17 - std::io::Write::write_fmt::h1d2ee292d2b65481
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/io/mod.rs:1514
[INFO] [stderr]    6:     0x5614f28b39b0 - std::sys_common::backtrace::_print::ha25f9ff5080d886d
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]    7:     0x5614f28b39b0 - std::sys_common::backtrace::print::h213e8aa8dc5405c0
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]    8:     0x5614f28b39b0 - std::panicking::default_hook::{{closure}}::h6482fae49ef9d963
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:200
[INFO] [stderr]    9:     0x5614f28b36fc - std::panicking::default_hook::he30ad7589e0970f9
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:219
[INFO] [stderr]   10:     0x5614f28b4013 - std::panicking::rust_panic_with_hook::haa1ed36ada4ffb03
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:569
[INFO] [stderr]   11:     0x5614f28b3be9 - std::panicking::begin_panic_handler::{{closure}}::h7001af1bb21aeaeb
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:476
[INFO] [stderr]   12:     0x5614f28b1c9c - std::sys_common::backtrace::__rust_end_short_backtrace::h39910f557f5f2367
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]   13:     0x5614f28b3ba9 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:475
[INFO] [stderr]   14:     0x5614f28cf751 - core::panicking::panic_fmt::h4e2659771ebc78eb
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/panicking.rs:85
[INFO] [stderr]   15:     0x5614f28cf573 - core::option::expect_none_failed::h448b58a024c2c33a
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/option.rs:1221
[INFO] [stderr]   16:     0x5614f28418c0 - core::result::Result<T,E>::unwrap::h34735b7b39af7dbe
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/result.rs:973
[INFO] [stderr]   17:     0x5614f2801825 - fork::fork::assert_dead::h2412d4e77edfa7da
[INFO] [stderr]                                at /opt/rustwide/workdir/tests/fork.rs:170
[INFO] [stderr]   18:     0x5614f28004d6 - fork::fork::multithreaded::ha5012c73d8623130
[INFO] [stderr]                                at /opt/rustwide/workdir/tests/fork.rs:101
[INFO] [stderr]   19:     0x5614f2801709 - fork::fork::main::hcc40d477cb4ac8a1
[INFO] [stderr]                                at /opt/rustwide/workdir/tests/fork.rs:160
[INFO] [stderr]   20:     0x5614f280fe06 - fork::main::h5f7b2ebeb69c97a8
[INFO] [stderr]                                at /opt/rustwide/workdir/tests/fork.rs:312
[INFO] [stderr]   21:     0x5614f280e38b - core::ops::function::FnOnce::call_once::h3e3268607b73f6cb
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stderr]   22:     0x5614f280a9fe - std::sys_common::backtrace::__rust_begin_short_backtrace::hd818374a11d0cc1b
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]   23:     0x5614f280cfb1 - std::rt::lang_start::{{closure}}::hcc3bdaba9f273ea6
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/rt.rs:66
[INFO] [stderr]   24:     0x5614f28b4411 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h6a3209f124be2235
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:259
[INFO] [stderr]   25:     0x5614f28b4411 - std::panicking::try::do_call::h88ce358792b64df0
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:373
[INFO] [stderr]   26:     0x5614f28b4411 - std::panicking::try::h6311c259678e50fc
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:337
[INFO] [stderr]   27:     0x5614f28b4411 - std::panic::catch_unwind::h56c5716807d659a1
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:379
[INFO] [stderr]   28:     0x5614f28b4411 - std::rt::lang_start_internal::h73711f37ecfcb277
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/rt.rs:51
[INFO] [stderr]   29:     0x5614f280cf87 - std::rt::lang_start::h86a88cfa8f7c970d
[INFO] [stderr]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/rt.rs:65
[INFO] [stderr]   30:     0x5614f280fe3a - main
[INFO] [stderr]   31:     0x7fe7a97210b3 - __libc_start_main
[INFO] [stderr]   32:     0x5614f27fe92e - _start
[INFO] [stderr]   33:                0x0 - <unknown>
[INFO] [stderr] error: test failed, to rerun pass '--test fork'
[INFO] running `Command { std: "docker" "inspect" "78ea8f1eba7f24e05942548a2bebcf6c93bfe2f115b368445b92a74264dbc1ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78ea8f1eba7f24e05942548a2bebcf6c93bfe2f115b368445b92a74264dbc1ed", kill_on_drop: false }`
[INFO] [stdout] 78ea8f1eba7f24e05942548a2bebcf6c93bfe2f115b368445b92a74264dbc1ed
