[INFO] fetching crate union 0.1.7...
[INFO] checking union-0.1.7 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate union 0.1.7 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate union 0.1.7 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate union 0.1.7
[INFO] finished tweaking crates.io crate union 0.1.7
[INFO] tweaked toml for crates.io crate union 0.1.7 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-timer v1.0.3
[INFO] [stderr]   Downloaded futures-select-macro-preview v0.3.0-alpha.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2eee35a26eedfc7b40c48b9cd291b99a88a93eb0fb50caae5408e91095e7682a
[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" "2eee35a26eedfc7b40c48b9cd291b99a88a93eb0fb50caae5408e91095e7682a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2eee35a26eedfc7b40c48b9cd291b99a88a93eb0fb50caae5408e91095e7682a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eee35a26eedfc7b40c48b9cd291b99a88a93eb0fb50caae5408e91095e7682a", kill_on_drop: false }`
[INFO] [stdout] 2eee35a26eedfc7b40c48b9cd291b99a88a93eb0fb50caae5408e91095e7682a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98943e5d3597b401330890f6fa20b4be064e225a58c4df4e2b8d698065083f86
[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" "98943e5d3597b401330890f6fa20b4be064e225a58c4df4e2b8d698065083f86", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]     Checking object v0.24.0
[INFO] [stderr]    Compiling openssl-sys v0.9.63
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.59
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-timer v1.0.3
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking encoding_rs v0.8.28
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling openssl v0.10.34
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking addr2line v0.15.1
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling union_impl v0.1.3
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling union_export v0.1.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking union v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking hyper v0.13.10
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.10
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/union_async_spawn.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 64 |         rt.block_on(async {
[INFO] [stdout]    |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/union_async_spawn.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 93 |         rt.block_on(async {
[INFO] [stdout]    |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:121:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 121 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 171 |         rt.block_on(
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async.rs:406:9
[INFO] [stdout]     |
[INFO] [stdout] 404 |         let rt = ::tokio::runtime::Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 405 | 
[INFO] [stdout] 406 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `union`
[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] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 251 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:290:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 290 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:346:9
[INFO] [stdout]     |
[INFO] [stdout] 345 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 346 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:355:9
[INFO] [stdout]     |
[INFO] [stdout] 354 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 355 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/union_async_spawn.rs:365:9
[INFO] [stdout]     |
[INFO] [stdout] 364 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 365 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "98943e5d3597b401330890f6fa20b4be064e225a58c4df4e2b8d698065083f86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98943e5d3597b401330890f6fa20b4be064e225a58c4df4e2b8d698065083f86", kill_on_drop: false }`
[INFO] [stdout] 98943e5d3597b401330890f6fa20b4be064e225a58c4df4e2b8d698065083f86