[INFO] fetching crate union 0.1.7...
[INFO] checking union-0.1.7 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate union 0.1.7 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate union 0.1.7 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-timer v1.0.3
[INFO] [stderr]   Downloaded futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 241f97b7f3348bb4bf22f8f2d60433a6c42d3985b848e53bdc08eaa0a09919e0
[INFO] running `Command { std: "docker" "start" "-a" "241f97b7f3348bb4bf22f8f2d60433a6c42d3985b848e53bdc08eaa0a09919e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "241f97b7f3348bb4bf22f8f2d60433a6c42d3985b848e53bdc08eaa0a09919e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "241f97b7f3348bb4bf22f8f2d60433a6c42d3985b848e53bdc08eaa0a09919e0", kill_on_drop: false }`
[INFO] [stdout] 241f97b7f3348bb4bf22f8f2d60433a6c42d3985b848e53bdc08eaa0a09919e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fd1d269017f3e34f7b8f6389ea5a345770e0aa0790aa37705d869609b92702e
[INFO] running `Command { std: "docker" "start" "-a" "4fd1d269017f3e34f7b8f6389ea5a345770e0aa0790aa37705d869609b92702e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking tracing-core v0.1.19
[INFO] [stderr]    Compiling futures-util v0.3.16
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[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking native-tls v0.2.8
[INFO] [stderr]    Compiling union_impl v0.1.3
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
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[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
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[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling union_export v0.1.3
[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 v1.0.8
[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
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[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.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` due to 2 previous errors
[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: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_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" "4fd1d269017f3e34f7b8f6389ea5a345770e0aa0790aa37705d869609b92702e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd1d269017f3e34f7b8f6389ea5a345770e0aa0790aa37705d869609b92702e", kill_on_drop: false }`
[INFO] [stdout] 4fd1d269017f3e34f7b8f6389ea5a345770e0aa0790aa37705d869609b92702e