[INFO] fetching crate lightbeam 0.20.0...
[INFO] testing lightbeam-0.20.0 against 1.47.0 for beta-1.48-1
[INFO] extracting crate lightbeam 0.20.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate lightbeam 0.20.0 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 lightbeam 0.20.0
[INFO] finished tweaking crates.io crate lightbeam 0.20.0
[INFO] tweaked toml for crates.io crate lightbeam 0.20.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate lightbeam 0.20.0 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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 6f1592bb27d7cf1b29f0cdd1c57a92c93985f3e75d4762bccdd0539fa321ecf0
[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" "6f1592bb27d7cf1b29f0cdd1c57a92c93985f3e75d4762bccdd0539fa321ecf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f1592bb27d7cf1b29f0cdd1c57a92c93985f3e75d4762bccdd0539fa321ecf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1592bb27d7cf1b29f0cdd1c57a92c93985f3e75d4762bccdd0539fa321ecf0", kill_on_drop: false }`
[INFO] [stdout] 6f1592bb27d7cf1b29f0cdd1c57a92c93985f3e75d4762bccdd0539fa321ecf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 05936ffdc485773cec91e37aba40b72ab03d237de3a50cc7cb16d46e3b769df1
[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" "05936ffdc485773cec91e37aba40b72ab03d237de3a50cc7cb16d46e3b769df1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling cranelift-entity v0.67.0
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.67.0
[INFO] [stderr]    Compiling hashbrown v0.9.0
[INFO] [stderr]    Compiling target-lexicon v0.11.0
[INFO] [stderr]    Compiling staticvec v0.10.5
[INFO] [stderr]    Compiling wasmparser v0.59.0
[INFO] [stderr]    Compiling capstone-sys v0.10.0
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling regalloc v0.0.30
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/staticvec-0.10.5/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | / #![feature(
[INFO] [stdout] 32 | |   const_fn,
[INFO] [stdout] 33 | |   const_fn_union,
[INFO] [stdout] 34 | |   const_generics,
[INFO] [stdout] ...  |
[INFO] [stdout] 51 | |   untagged_unions
[INFO] [stdout] 52 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/staticvec-0.10.5/src/lib.rs:53:30
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![cfg_attr(feature = "std", feature(read_initializer))]
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cranelift-bforest v0.67.0
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stdout] error[E0599]: no method named `assume_init_mut` found for union `core::mem::MaybeUninit<[T; N2]>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/staticvec-0.10.5/src/lib.rs:213:42
[INFO] [stdout]     |
[INFO] [stdout] 213 |             ptr::drop_in_place(forgotten.assume_init_mut().get_unchecked_mut(N2.min(N)..N2));
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.67.0
[INFO] [stdout] error[E0599]: no method named `assume_init_read` found for union `core::mem::MaybeUninit<[T; N]>` in the current scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/staticvec-0.10.5/src/lib.rs:1790:29
[INFO] [stdout]      |
[INFO] [stdout] 1790 |       unsafe { Ok(self.data.assume_init_read()) }
[INFO] [stdout]      |                             ^^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `assume_init_mut` found for union `core::mem::MaybeUninit<StaticVec<T, N1>>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/staticvec-0.10.5/src/trait_impls.rs:221:12
[INFO] [stdout]     |
[INFO] [stdout] 221 |           .assume_init_mut()
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `assume_init_mut` found for union `core::mem::MaybeUninit<StaticVec<T, N1>>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/staticvec-0.10.5/src/trait_impls.rs:241:16
[INFO] [stdout]     |
[INFO] [stdout] 241 |               .assume_init_mut()
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `staticvec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "05936ffdc485773cec91e37aba40b72ab03d237de3a50cc7cb16d46e3b769df1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05936ffdc485773cec91e37aba40b72ab03d237de3a50cc7cb16d46e3b769df1", kill_on_drop: false }`
[INFO] [stdout] 05936ffdc485773cec91e37aba40b72ab03d237de3a50cc7cb16d46e3b769df1
