[INFO] crate union 0.1.7 is already in cache
[INFO] checking union-0.1.7 against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] extracting crate union 0.1.7 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate union 0.1.7 on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "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] 18958cd027dbad30e7ddb0f2fda00e52677a8fac08c251bd6bbbd5477df278fa
[INFO] running `"docker" "start" "-a" "18958cd027dbad30e7ddb0f2fda00e52677a8fac08c251bd6bbbd5477df278fa"`
[INFO] [stderr]     Checking futures-timer v1.0.3
[INFO] [stderr]     Checking tokio v0.2.10
[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_impl v0.1.3
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling union_export v0.1.3
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking union v0.1.7 (/opt/rustwide/workdir)
[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 v0.13.1
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/union_async_spawn.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 64 |         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/union_async_spawn.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]    |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 93 |         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/union_async_spawn.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 121 |         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/union_async_spawn.rs:171:9
[INFO] [stderr]     |
[INFO] [stderr] 170 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 171 |         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/union_async_spawn.rs:251:9
[INFO] [stderr]     |
[INFO] [stderr] 250 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 251 |         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/union_async_spawn.rs:290:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 290 |         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/union_async_spawn.rs:346:9
[INFO] [stderr]     |
[INFO] [stderr] 345 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 346 |         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/union_async_spawn.rs:355:9
[INFO] [stderr]     |
[INFO] [stderr] 354 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 355 |         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/union_async_spawn.rs:365:9
[INFO] [stderr]     |
[INFO] [stderr] 364 |         let rt = Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 365 |         rt.block_on(async {
[INFO] [stderr]     |         ^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `union`.
[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/union_async.rs:406:9
[INFO] [stderr]     |
[INFO] [stderr] 404 |         let rt = ::tokio::runtime::Runtime::new().unwrap();
[INFO] [stderr]     |             -- help: consider changing this to be mutable: `mut rt`
[INFO] [stderr] 405 | 
[INFO] [stderr] 406 |         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 `union`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "18958cd027dbad30e7ddb0f2fda00e52677a8fac08c251bd6bbbd5477df278fa"`
[INFO] running `"docker" "rm" "-f" "18958cd027dbad30e7ddb0f2fda00e52677a8fac08c251bd6bbbd5477df278fa"`
[INFO] [stdout] 18958cd027dbad30e7ddb0f2fda00e52677a8fac08c251bd6bbbd5477df278fa