[INFO] fetching crate nimiq-rpc-server 0.2.0...
[INFO] documenting nimiq-rpc-server-0.2.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate nimiq-rpc-server 0.2.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate nimiq-rpc-server 0.2.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nimiq-rpc-server 0.2.0
[INFO] finished tweaking crates.io crate nimiq-rpc-server 0.2.0
[INFO] tweaked toml for crates.io crate nimiq-rpc-server 0.2.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lmdb-zero v0.4.4
[INFO] [stderr]   Downloaded liblmdb-sys v0.2.2
[INFO] [stderr]   Downloaded nimiq-tree-primitives v0.2.0
[INFO] [stderr]   Downloaded nimiq-messages v0.2.0
[INFO] [stderr]   Downloaded nimiq-consensus v0.2.0
[INFO] [stderr]   Downloaded nimiq-mempool v0.2.0
[INFO] [stderr]   Downloaded nimiq-accounts v0.2.0
[INFO] [stderr]   Downloaded nimiq-block-production v0.2.0
[INFO] [stderr]   Downloaded nimiq-block v0.2.0
[INFO] [stderr]   Downloaded nimiq-blockchain v0.2.0
[INFO] [stderr]   Downloaded weak-table v0.2.4
[INFO] [stderr]   Downloaded tokio-tungstenite v0.8.0
[INFO] [stderr]   Downloaded tungstenite v0.8.1
[INFO] [stderr]   Downloaded nimiq-network v0.2.0
[INFO] [stderr]   Downloaded nimiq-database v0.2.0
[INFO] [stderr]   Downloaded nimiq-network-primitives v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] cf014ace40f6ef24569f6e602acedb33472aa2f0d3ead2953d7a0626095b6bd6
[INFO] running `Command { std: "docker" "start" "-a" "cf014ace40f6ef24569f6e602acedb33472aa2f0d3ead2953d7a0626095b6bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf014ace40f6ef24569f6e602acedb33472aa2f0d3ead2953d7a0626095b6bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf014ace40f6ef24569f6e602acedb33472aa2f0d3ead2953d7a0626095b6bd6", kill_on_drop: false }`
[INFO] [stdout] cf014ace40f6ef24569f6e602acedb33472aa2f0d3ead2953d7a0626095b6bd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 56a3e3c359c6be3c83d30d54d56243ec63f2a5667285752005342add95bafe29
[INFO] running `Command { std: "docker" "start" "-a" "56a3e3c359c6be3c83d30d54d56243ec63f2a5667285752005342add95bafe29", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking unicode-bidi v0.3.8
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking nimiq-macros v0.2.0
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking nimiq-collections v0.2.0
[INFO] [stderr]     Checking data-encoding v2.3.2
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]     Checking supercow v0.1.0
[INFO] [stderr]     Checking openssl-probe v0.1.5
[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/nimiq-collections-0.2.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_into_raw_non_null)]
[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/nimiq-collections-0.2.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[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/nimiq-collections-0.2.0/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_into_raw_non_null)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `box_into_raw_non_null`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.2.0/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_into_raw_non_null)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking atomic v0.4.6
[INFO] [stdout] error[E0599]: no function or associated item named `into_raw_non_null` found for struct `Box<_, _>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.2.0/src/linked_list.rs:141:34
[INFO] [stdout]     |
[INFO] [stdout] 141 |             let node = Some(Box::into_raw_non_null(node));
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^ function or associated item not found in `Box<_, _>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `into_raw_non_null` found for struct `Box<_, _>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.2.0/src/linked_list.rs:176:34
[INFO] [stdout]     |
[INFO] [stdout] 176 |             let node = Some(Box::into_raw_non_null(node));
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^ function or associated item not found in `Box<_, _>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `into_raw_non_null` found for struct `Box<_, _>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.2.0/src/linked_list.rs:914:38
[INFO] [stdout]     |
[INFO] [stdout] 914 |                 let node = Some(Box::into_raw_non_null(Box::new(Node {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^ function or associated item not found in `Box<_, _>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nimiq-collections` due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "56a3e3c359c6be3c83d30d54d56243ec63f2a5667285752005342add95bafe29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56a3e3c359c6be3c83d30d54d56243ec63f2a5667285752005342add95bafe29", kill_on_drop: false }`
[INFO] [stdout] 56a3e3c359c6be3c83d30d54d56243ec63f2a5667285752005342add95bafe29