[INFO] fetching crate generic-vec 0.1.2...
[INFO] testing generic-vec-0.1.2 against 1.49.0 for beta-1.50-1
[INFO] extracting crate generic-vec 0.1.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate generic-vec 0.1.2 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate generic-vec 0.1.2
[INFO] finished tweaking crates.io crate generic-vec 0.1.2
[INFO] tweaked toml for crates.io crate generic-vec 0.1.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 274351c1021c2da5462887a12c85e22a27a351ceb1002b40e96d131f74bacc9d
[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" "274351c1021c2da5462887a12c85e22a27a351ceb1002b40e96d131f74bacc9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "274351c1021c2da5462887a12c85e22a27a351ceb1002b40e96d131f74bacc9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "274351c1021c2da5462887a12c85e22a27a351ceb1002b40e96d131f74bacc9d", kill_on_drop: false }`
[INFO] [stdout] 274351c1021c2da5462887a12c85e22a27a351ceb1002b40e96d131f74bacc9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] fe4c910a9cf5afa673cfc1d6cd7c729ff4b51da724e88845ac3e60f5cfcebd39
[INFO] running `Command { std: "docker" "start" "-a" "fe4c910a9cf5afa673cfc1d6cd7c729ff4b51da724e88845ac3e60f5cfcebd39", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-vec v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "fe4c910a9cf5afa673cfc1d6cd7c729ff4b51da724e88845ac3e60f5cfcebd39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe4c910a9cf5afa673cfc1d6cd7c729ff4b51da724e88845ac3e60f5cfcebd39", kill_on_drop: false }`
[INFO] [stdout] fe4c910a9cf5afa673cfc1d6cd7c729ff4b51da724e88845ac3e60f5cfcebd39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cdd9bbb70e76910c4c316622b8e2a88593d18af80baae2a010380cbb9ac3191
[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" "7cdd9bbb70e76910c4c316622b8e2a88593d18af80baae2a010380cbb9ac3191", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling alloc-traits v0.1.1
[INFO] [stderr]    Compiling static-alloc v0.2.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling mockalloc-macros v0.1.0
[INFO] [stderr]    Compiling mockalloc v0.1.2
[INFO] [stderr]    Compiling generic-vec v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 20.39s
[INFO] running `Command { std: "docker" "inspect" "7cdd9bbb70e76910c4c316622b8e2a88593d18af80baae2a010380cbb9ac3191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cdd9bbb70e76910c4c316622b8e2a88593d18af80baae2a010380cbb9ac3191", kill_on_drop: false }`
[INFO] [stdout] 7cdd9bbb70e76910c4c316622b8e2a88593d18af80baae2a010380cbb9ac3191
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 56e690b40a035c7eb5b0f1522b28eaf47de23400cd3681e99a710330baecb82d
[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" "56e690b40a035c7eb5b0f1522b28eaf47de23400cd3681e99a710330baecb82d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/generic_vec-967142d3b6ccbb98
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tests-65b584dc59470095
[INFO] [stdout] 
[INFO] [stdout] running 62 tests
[INFO] [stdout] test heap_vec::copy::cursor::drain ... ok
[INFO] [stdout] test heap_vec::copy::cursor::cursor_back ... ok
[INFO] [stdout] test heap_vec::copy::cursor::cursor_front ... ok
[INFO] [stdout] test heap_vec::copy::cursor::drain_filter ... ok
[INFO] [stdout] test heap_vec::copy::splice::splice_exact_or_more ... ok
[INFO] [stdout] test heap_vec::copy::drain::drain ... ok
[INFO] [stdout] test heap_vec::copy::drain::drain_filter ... ok
[INFO] [stdout] test heap_vec::copy::into_iter::into_iter ... ok
[INFO] [stdout] test heap_vec::copy::splice::splice_less ... ok
[INFO] [stdout] test heap_vec::copy::vec_ops::consume_extend ... ok
[INFO] [stdout] test heap_vec::copy::vec_ops::split_off ... ok
[INFO] [stdout] test heap_vec::owned::cursor::raw_drain_back ... ok
[INFO] [stdout] test heap_vec::owned::cursor::raw_drain_front ... ok
[INFO] [stdout] test heap_vec::owned::vec_ops::split_off ... ok
[INFO] [stdout] test heap_vec::owned::drain::drain ... ok
[INFO] [stdout] test init_slice_vec::copy::cursor::drain ... ok
[INFO] [stdout] test init_slice_vec::copy::cursor::drain_filter ... ok
[INFO] [stdout] test init_slice_vec::copy::cursor::cursor_back ... ok
[INFO] [stdout] test heap_vec::owned::drain::drain_filter ... ok
[INFO] [stdout] test init_slice_vec::copy::cursor::cursor_front ... ok
[INFO] [stdout] test heap_vec::owned::into_iter::into_iter ... ok
[INFO] [stdout] test init_slice_vec::copy::drain::drain ... ok
[INFO] [stdout] test heap_vec::owned::simple::simple ... ok
[INFO] [stdout] test init_slice_vec::copy::drain::drain_filter ... ok
[INFO] [stdout] test init_slice_vec::copy::splice::splice_from_zero ... ok
[INFO] [stdout] test init_slice_vec::copy::splice::splice_less ... ok
[INFO] [stdout] test heap_vec::owned::splice::splice_exact_or_more ... ok
[INFO] [stdout] test heap_vec::owned::splice::splice_from_zero ... ok
[INFO] [stdout] test init_slice_vec::copy::splice::splice_exact_or_more ... ok
[INFO] [stdout] test init_slice_vec::copy::simple::simple ... ok
[INFO] [stdout] test heap_vec::owned::splice::splice_less ... ok
[INFO] [stdout] test heap_vec::owned::vec_ops::consume_extend ... ok
[INFO] [stdout] test slice_vec::copy::cursor::cursor_back ... ok
[INFO] [stdout] test init_slice_vec::copy::vec_ops::split_off ... ok
[INFO] [stdout] test slice_vec::copy::cursor::cursor_front ... ok
[INFO] [stdout] test init_slice_vec::copy::into_iter::into_iter ... ok
[INFO] [stdout] test heap_vec::copy::simple::simple ... ok
[INFO] [stdout] test slice_vec::copy::cursor::drain ... ok
[INFO] [stdout] test slice_vec::copy::vec_ops::consume_extend ... ok
[INFO] [stdout] test slice_vec::copy::splice::splice_from_zero ... ok
[INFO] [stdout] test slice_vec::copy::splice::splice_less ... ok
[INFO] [stdout] test slice_vec::copy::cursor::drain_filter ... ok
[INFO] [stdout] test slice_vec::copy::splice::splice_exact_or_more ... ok
[INFO] [stdout] test slice_vec::copy::vec_ops::split_off ... ok
[INFO] [stdout] test slice_vec::owned::cursor::raw_drain_back ... ok
[INFO] [stdout] test slice_vec::owned::drain::drain ... ok
[INFO] [stdout] test slice_vec::copy::drain::drain ... ok
[INFO] [stdout] test slice_vec::owned::drain::drain_filter ... ok
[INFO] [stdout] test slice_vec::owned::splice::splice_less ... ok
[INFO] [stdout] test slice_vec::owned::vec_ops::consume_extend ... ok
[INFO] [stdout] test slice_vec::owned::cursor::raw_drain_front ... ok
[INFO] [stdout] test slice_vec::owned::vec_ops::split_off ... ok
[INFO] [stdout] test slice_vec::owned::splice::splice_from_zero ... ok
[INFO] [stdout] test slice_vec::owned::splice::splice_exact_or_more ... ok
[INFO] [stdout] test slice_vec::owned::simple::simple ... ok
[INFO] [stdout] test heap_vec::copy::splice::splice_from_zero ... ok
[INFO] [stdout] test zero_sized::zero_sized ... ok
[INFO] [stdout] test init_slice_vec::copy::vec_ops::consume_extend ... ok
[INFO] [stdout] test slice_vec::owned::into_iter::into_iter ... ok
[INFO] [stderr]    Doc-tests generic-vec
[INFO] [stdout] test slice_vec::copy::drain::drain_filter ... ok
[INFO] [stdout] test slice_vec::copy::into_iter::into_iter ... ok
[INFO] [stdout] test slice_vec::copy::simple::simple ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 62 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/workdir/src/lib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     feature(min_const_generics, unsafe_block_in_unsafe_fn)
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:8:5
[INFO] [stderr]    |
[INFO] [stderr] 8  | /     feature(
[INFO] [stderr] 9  | |         trusted_len,
[INFO] [stderr] 10 | |         min_specialization,
[INFO] [stderr] 11 | |         exact_size_is_empty,
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |         doc_cfg,
[INFO] [stderr] 19 | |     )
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "56e690b40a035c7eb5b0f1522b28eaf47de23400cd3681e99a710330baecb82d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56e690b40a035c7eb5b0f1522b28eaf47de23400cd3681e99a710330baecb82d", kill_on_drop: false }`
[INFO] [stdout] 56e690b40a035c7eb5b0f1522b28eaf47de23400cd3681e99a710330baecb82d