[INFO] cloning repository https://github.com/L-jasmine/try_flows
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/L-jasmine/try_flows" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL-jasmine%2Ftry_flows", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL-jasmine%2Ftry_flows'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02039bb51349ea099ea9ceb8ed0791b2e9e19df0
[INFO] checking L-jasmine/try_flows against master#bb89df6903539e7014b8db29bccd6a9ee9553122 for pr-121072
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL-jasmine%2Ftry_flows" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/L-jasmine/try_flows on toolchain bb89df6903539e7014b8db29bccd6a9ee9553122
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bb89df6903539e7014b8db29bccd6a9ee9553122" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/L-jasmine/try_flows
[INFO] finished tweaking git repo https://github.com/L-jasmine/try_flows
[INFO] tweaked toml for git repo https://github.com/L-jasmine/try_flows written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/L-jasmine/try_flows 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" "+bb89df6903539e7014b8db29bccd6a9ee9553122" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking L-jasmine/try_flows against try#e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0 for pr-121072
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL-jasmine%2Ftry_flows" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/L-jasmine/try_flows on toolchain e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/L-jasmine/try_flows
[INFO] finished tweaking git repo https://github.com/L-jasmine/try_flows
[INFO] tweaked toml for git repo https://github.com/L-jasmine/try_flows written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/L-jasmine/try_flows 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" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "fetch" "--manifest-path" "Cargo.toml", 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]  Downloading crates ...
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.91
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.91
[INFO] [stderr]   Downloaded wasmedge_wasi_socket v0.4.3
[INFO] [stderr]   Downloaded cxx-build v1.0.91
[INFO] [stderr]   Downloaded http_req_wasi v0.10.2
[INFO] [stderr]   Downloaded cxx v1.0.91
[INFO] [stderr]   Downloaded lambda-flows v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 016bc313bf84da2446e49955fc67d5ebac020f30b0e363b453fc67be79d80e2f
[INFO] running `Command { std: "docker" "start" "-a" "016bc313bf84da2446e49955fc67d5ebac020f30b0e363b453fc67be79d80e2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "016bc313bf84da2446e49955fc67d5ebac020f30b0e363b453fc67be79d80e2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "016bc313bf84da2446e49955fc67d5ebac020f30b0e363b453fc67be79d80e2f", kill_on_drop: false }`
[INFO] [stdout] 016bc313bf84da2446e49955fc67d5ebac020f30b0e363b453fc67be79d80e2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dc5f13e9102a821fe6e83f6f04706ffa084cf3dcb60823a005cac4084b94826
[INFO] running `Command { std: "docker" "start" "-a" "3dc5f13e9102a821fe6e83f6f04706ffa084cf3dcb60823a005cac4084b94826", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling serde_json v1.0.93
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]     Checking iana-time-zone v0.1.53
[INFO] [stderr]     Checking urlencoding v2.1.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3dc5f13e9102a821fe6e83f6f04706ffa084cf3dcb60823a005cac4084b94826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dc5f13e9102a821fe6e83f6f04706ffa084cf3dcb60823a005cac4084b94826", kill_on_drop: false }`
[INFO] [stdout] 3dc5f13e9102a821fe6e83f6f04706ffa084cf3dcb60823a005cac4084b94826