[INFO] fetching crate superchan 0.0.7...
[INFO] checking superchan-0.0.7 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate superchan 0.0.7 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate superchan 0.0.7 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate superchan 0.0.7
[INFO] finished tweaking crates.io crate superchan 0.0.7
[INFO] tweaked toml for crates.io crate superchan 0.0.7 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02a64bc4f387228fbbc2c71af47a439c72578e560bcc71e0647316283dbddd89
[INFO] running `Command { std: "docker" "start" "-a" "02a64bc4f387228fbbc2c71af47a439c72578e560bcc71e0647316283dbddd89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02a64bc4f387228fbbc2c71af47a439c72578e560bcc71e0647316283dbddd89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02a64bc4f387228fbbc2c71af47a439c72578e560bcc71e0647316283dbddd89", kill_on_drop: false }`
[INFO] [stdout] 02a64bc4f387228fbbc2c71af47a439c72578e560bcc71e0647316283dbddd89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfbde416f3cb06b9dc733dd294fc0881debd2b5ac12f1d9d4edd1921bcf8e946
[INFO] running `Command { std: "docker" "start" "-a" "dfbde416f3cb06b9dc733dd294fc0881debd2b5ac12f1d9d4edd1921bcf8e946", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.2.15
[INFO] [stdout] error: invalid suffix `us` for number literal
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/json.rs:3819:42
[INFO] [stdout]      |
[INFO] [stdout] 3819 |         tree_map.insert("a".to_string(), 1us);
[INFO] [stdout]      |                                          ^^^ invalid suffix `us`
[INFO] [stdout]      |
[INFO] [stdout]      = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid suffix `us` for number literal
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/json.rs:3823:42
[INFO] [stdout]      |
[INFO] [stdout] 3823 |         hash_map.insert("a".to_string(), 1us);
[INFO] [stdout]      |                                          ^^^ invalid suffix `us`
[INFO] [stdout]      |
[INFO] [stdout]      = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `unicode`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/lib.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | extern crate unicode;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-serialize` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "dfbde416f3cb06b9dc733dd294fc0881debd2b5ac12f1d9d4edd1921bcf8e946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfbde416f3cb06b9dc733dd294fc0881debd2b5ac12f1d9d4edd1921bcf8e946", kill_on_drop: false }`
[INFO] [stdout] dfbde416f3cb06b9dc733dd294fc0881debd2b5ac12f1d9d4edd1921bcf8e946