[INFO] fetching crate simple-async-cache-rs 0.3.3...
[INFO] building simple-async-cache-rs-0.3.3 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate simple-async-cache-rs 0.3.3 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate simple-async-cache-rs 0.3.3
[INFO] finished tweaking crates.io crate simple-async-cache-rs 0.3.3
[INFO] tweaked toml for crates.io crate simple-async-cache-rs 0.3.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple-async-cache-rs 0.3.3 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simple-async-cache-rs 0.3.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b99fba0fd5108a3ff8be8c768f4e4dee811567520aa3cbec5f6e58623339e63a
[INFO] running `Command { std: "docker" "start" "-a" "b99fba0fd5108a3ff8be8c768f4e4dee811567520aa3cbec5f6e58623339e63a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b99fba0fd5108a3ff8be8c768f4e4dee811567520aa3cbec5f6e58623339e63a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b99fba0fd5108a3ff8be8c768f4e4dee811567520aa3cbec5f6e58623339e63a", kill_on_drop: false }`
[INFO] [stdout] b99fba0fd5108a3ff8be8c768f4e4dee811567520aa3cbec5f6e58623339e63a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38e3245ec614368b1cee0457f5a76ff40bcf342fb4c5240420b5b5b118116f85
[INFO] running `Command { std: "docker" "start" "-a" "38e3245ec614368b1cee0457f5a76ff40bcf342fb4c5240420b5b5b118116f85", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.7.1
[INFO] [stderr]    Compiling simple-async-cache-rs v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.32s
[INFO] running `Command { std: "docker" "inspect" "38e3245ec614368b1cee0457f5a76ff40bcf342fb4c5240420b5b5b118116f85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e3245ec614368b1cee0457f5a76ff40bcf342fb4c5240420b5b5b118116f85", kill_on_drop: false }`
[INFO] [stdout] 38e3245ec614368b1cee0457f5a76ff40bcf342fb4c5240420b5b5b118116f85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bf0fb50bb4fdd309815a0cdcabcdedcb5b18e25ab66e0e63955752ecc469ee6
[INFO] running `Command { std: "docker" "start" "-a" "1bf0fb50bb4fdd309815a0cdcabcdedcb5b18e25ab66e0e63955752ecc469ee6", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple-async-cache-rs v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `main` in `tokio`
[INFO] [stdout]  --> examples/string_cache.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[tokio::main]
[INFO] [stdout]   |          ^^^^ could not find `main` in `tokio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0752]: `main` function is not allowed to be `async`
[INFO] [stdout]  --> examples/string_cache.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | async fn main() {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^ `main` function is not allowed to be `async`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0752.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple-async-cache-rs` (example "string_cache") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1bf0fb50bb4fdd309815a0cdcabcdedcb5b18e25ab66e0e63955752ecc469ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bf0fb50bb4fdd309815a0cdcabcdedcb5b18e25ab66e0e63955752ecc469ee6", kill_on_drop: false }`
[INFO] [stdout] 1bf0fb50bb4fdd309815a0cdcabcdedcb5b18e25ab66e0e63955752ecc469ee6