[INFO] crate join 0.1.0-beta.8 is already in cache
[INFO] checking join-0.1.0-beta.8 against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] extracting crate join 0.1.0-beta.8 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate join 0.1.0-beta.8 on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate join 0.1.0-beta.8
[INFO] finished tweaking crates.io crate join 0.1.0-beta.8
[INFO] tweaked toml for crates.io crate join 0.1.0-beta.8 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4f2a1f526c86d9bcafda7266dbf4aca302966892393788515b6ca86e3863441f
[INFO] running `"docker" "start" "-a" "4f2a1f526c86d9bcafda7266dbf4aca302966892393788515b6ca86e3863441f"`
[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 join_impl v0.1.1
[INFO] [stderr]     Checking hyper v0.13.2
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling join_export v0.1.1
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]     Checking join v0.1.0-beta.8 (/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] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/join_async_spawn.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 57 |         rt.block_on(async {
[INFO] [stderr]    |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/join_async_spawn.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 86 |         rt.block_on(async {
[INFO] [stderr]    |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 115 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:166:9
[INFO] [stderr]     |
[INFO] [stderr] 165 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 166 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:176:9
[INFO] [stderr]     |
[INFO] [stderr] 175 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 176 |         rt.block_on(
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:247:9
[INFO] [stderr]     |
[INFO] [stderr] 246 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 247 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:292:9
[INFO] [stderr]     |
[INFO] [stderr] 287 |         let rt = tokio::runtime::Builder::new()
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] ...
[INFO] [stderr] 292 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:326:9
[INFO] [stderr]     |
[INFO] [stderr] 322 |         let rt = tokio::runtime::Builder::new()
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] ...
[INFO] [stderr] 326 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:400:9
[INFO] [stderr]     |
[INFO] [stderr] 399 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 400 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:409:9
[INFO] [stderr]     |
[INFO] [stderr] 408 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 409 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:419:9
[INFO] [stderr]     |
[INFO] [stderr] 418 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 419 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:442:9
[INFO] [stderr]     |
[INFO] [stderr] 441 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 442 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:451:9
[INFO] [stderr]     |
[INFO] [stderr] 450 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 451 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async_spawn.rs:514:9
[INFO] [stderr]     |
[INFO] [stderr] 513 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 514 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 14 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `join`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/join_async.rs:566:9
[INFO] [stderr]     |
[INFO] [stderr] 564 |         let rt = ::tokio::runtime::Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 565 | 
[INFO] [stderr] 566 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `join`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4f2a1f526c86d9bcafda7266dbf4aca302966892393788515b6ca86e3863441f"`
[INFO] running `"docker" "rm" "-f" "4f2a1f526c86d9bcafda7266dbf4aca302966892393788515b6ca86e3863441f"`
[INFO] [stdout] 4f2a1f526c86d9bcafda7266dbf4aca302966892393788515b6ca86e3863441f