[INFO] fetching crate join 0.1.1...
[INFO] checking join-0.1.1 against beta for pr-78714
[INFO] extracting crate join 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate join 0.1.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate join 0.1.1
[INFO] finished tweaking crates.io crate join 0.1.1
[INFO] tweaked toml for crates.io crate join 0.1.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] f045d5e51efab32349cba737c37868947514f334a908ff8a7c2aaee8cbfb6b8c
[INFO] running `Command { std: "docker" "start" "-a" "f045d5e51efab32349cba737c37868947514f334a908ff8a7c2aaee8cbfb6b8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f045d5e51efab32349cba737c37868947514f334a908ff8a7c2aaee8cbfb6b8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f045d5e51efab32349cba737c37868947514f334a908ff8a7c2aaee8cbfb6b8c", kill_on_drop: false }`
[INFO] [stdout] f045d5e51efab32349cba737c37868947514f334a908ff8a7c2aaee8cbfb6b8c
[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" "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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] 9696dfc667d15b7bcf78000b105d4413e7cdfd78a195b71e3870f88c61cfe7b1
[INFO] running `Command { std: "docker" "start" "-a" "9696dfc667d15b7bcf78000b105d4413e7cdfd78a195b71e3870f88c61cfe7b1", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling join_impl v0.1.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]    Compiling join_export v0.1.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking join v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-timer v0.4.0
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.8
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/join_async_spawn.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 57 |         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/join_async_spawn.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 86 |         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/join_async_spawn.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 115 |         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/join_async_spawn.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 166 |         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/join_async_spawn.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 176 |         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/join_async_spawn.rs:247:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 247 |         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/join_async_spawn.rs:292:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         let rt = tokio::runtime::Builder::new()
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] ...
[INFO] [stdout] 292 |         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/join_async_spawn.rs:326:9
[INFO] [stdout]     |
[INFO] [stdout] 322 |         let rt = tokio::runtime::Builder::new()
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] ...
[INFO] [stdout] 326 |         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/join_async_spawn.rs:400:9
[INFO] [stdout]     |
[INFO] [stdout] 399 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 400 |         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/join_async_spawn.rs:409:9
[INFO] [stdout]     |
[INFO] [stdout] 408 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 409 |         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/join_async_spawn.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 418 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 419 |         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/join_async_spawn.rs:442:9
[INFO] [stdout]     |
[INFO] [stdout] 441 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 442 |         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/join_async_spawn.rs:451:9
[INFO] [stdout]     |
[INFO] [stdout] 450 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 451 |         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/join_async_spawn.rs:514:9
[INFO] [stdout]     |
[INFO] [stdout] 513 |         let rt = Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 514 |         rt.block_on(async {
[INFO] [stdout]     |         ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 14 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `join`
[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/join_async.rs:566:9
[INFO] [stdout]     |
[INFO] [stdout] 564 |         let rt = ::tokio::runtime::Runtime::new().unwrap();
[INFO] [stdout]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 565 | 
[INFO] [stdout] 566 |         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: build failed
[INFO] running `Command { std: "docker" "inspect" "9696dfc667d15b7bcf78000b105d4413e7cdfd78a195b71e3870f88c61cfe7b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9696dfc667d15b7bcf78000b105d4413e7cdfd78a195b71e3870f88c61cfe7b1", kill_on_drop: false }`
[INFO] [stdout] 9696dfc667d15b7bcf78000b105d4413e7cdfd78a195b71e3870f88c61cfe7b1