[INFO] crate tokio 0.2.18 is already in cache
[INFO] testing tokio-0.2.18 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate tokio 0.2.18 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tokio 0.2.18 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tokio 0.2.18
[INFO] finished tweaking crates.io crate tokio 0.2.18
[INFO] tweaked toml for crates.io crate tokio 0.2.18 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stdout] 783ceda8205f1f4cfa247c9b46dd1375a5428f864388a257f51c44676c9c75ad
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "783ceda8205f1f4cfa247c9b46dd1375a5428f864388a257f51c44676c9c75ad"`
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling pin-project-lite v0.1.4
[INFO] [stderr]    Compiling tokio v0.2.18 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
[INFO] running `"docker" "inspect" "783ceda8205f1f4cfa247c9b46dd1375a5428f864388a257f51c44676c9c75ad"`
[INFO] running `"docker" "rm" "-f" "783ceda8205f1f4cfa247c9b46dd1375a5428f864388a257f51c44676c9c75ad"`
[INFO] [stdout] 783ceda8205f1f4cfa247c9b46dd1375a5428f864388a257f51c44676c9c75ad
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c9a840a3529ce5b2c210d49235b1897040e770a13291c6dffabbaeae038fb962
[INFO] running `"docker" "start" "-a" "c9a840a3529ce5b2c210d49235b1897040e770a13291c6dffabbaeae038fb962"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling tokio v0.2.18
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling generator v0.6.20
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tokio-test v0.2.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling rusty-fork v0.2.2
[INFO] [stderr]    Compiling proptest v0.9.6
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling loom v0.3.2
[INFO] [stderr]    Compiling tokio v0.2.18 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `tokio::stream`
[INFO] [stderr]  --> tests/stream_fuse.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | use tokio::stream::{Stream, StreamExt};
[INFO] [stderr]   |            ^^^^^^ could not find `stream` in `tokio`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `test` in `tokio`
[INFO] [stderr]   --> tests/stream_fuse.rs:27:10
[INFO] [stderr]    |
[INFO] [stderr] 27 | #[tokio::test]
[INFO] [stderr]    |          ^^^^ could not find `test` in `tokio`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `tokio`.
[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] [stderr] error[E0432]: unresolved imports `tokio::stream`, `tokio::stream`
[INFO] [stderr]  --> tests/stream_empty.rs:1:21
[INFO] [stderr]   |
[INFO] [stderr] 1 | use tokio::stream::{self, Stream, StreamExt};
[INFO] [stderr]   |            ^^^^^^   ^^^^ no `stream` in the root
[INFO] [stderr]   |            |
[INFO] [stderr]   |            could not find `stream` in `tokio`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `test` in `tokio`
[INFO] [stderr]  --> tests/stream_empty.rs:3:10
[INFO] [stderr]   |
[INFO] [stderr] 3 | #[tokio::test]
[INFO] [stderr]   |          ^^^^ could not find `test` in `tokio`
[INFO] [stderr] 
[INFO] [stderr] error[E0698]: type inside `async fn` body must be known in this context
[INFO] [stderr]  --> tests/stream_empty.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 |     for _ in 0..2 {
[INFO] [stderr]   |              ^ cannot infer type for type `{integer}`
[INFO] [stderr]   |
[INFO] [stderr] note: the type is part of the `async fn` body because of this `await`
[INFO] [stderr]  --> tests/stream_empty.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 |         assert_eq!(None, stream.next().await);
[INFO] [stderr]   |                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0698]: type inside `async fn` body must be known in this context
[INFO] [stderr]  --> tests/stream_empty.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |     for _ in 0..2 {
[INFO] [stderr]   |                 ^ cannot infer type for type `{integer}`
[INFO] [stderr]   |
[INFO] [stderr] note: the type is part of the `async fn` body because of this `await`
[INFO] [stderr]  --> tests/stream_empty.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 |         assert_eq!(None, stream.next().await);
[INFO] [stderr]   |                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0698]: type inside `async fn` body must be known in this context
[INFO] [stderr]  --> tests/stream_empty.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 |     for _ in 0..2 {
[INFO] [stderr]   |              ^^^^ cannot infer type for type `{integer}`
[INFO] [stderr]   |
[INFO] [stderr] note: the type is part of the `async fn` body because of this `await`
[INFO] [stderr]  --> tests/stream_empty.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 |         assert_eq!(None, stream.next().await);
[INFO] [stderr]   |                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0433, E0698.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `tokio`.
[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] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c9a840a3529ce5b2c210d49235b1897040e770a13291c6dffabbaeae038fb962"`
[INFO] running `"docker" "rm" "-f" "c9a840a3529ce5b2c210d49235b1897040e770a13291c6dffabbaeae038fb962"`
[INFO] [stdout] c9a840a3529ce5b2c210d49235b1897040e770a13291c6dffabbaeae038fb962