[INFO] cloning repository https://github.com/jamesmunns/deser_n
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jamesmunns/deser_n" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamesmunns%2Fdeser_n", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamesmunns%2Fdeser_n'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a79f2b4a0c6a26dd44a802f2c5f69b78dc04c62
[INFO] testing jamesmunns/deser_n against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamesmunns%2Fdeser_n" "/workspace/builds/worker-86/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-86/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jamesmunns/deser_n on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jamesmunns/deser_n
[INFO] finished tweaking git repo https://github.com/jamesmunns/deser_n
[INFO] tweaked toml for git repo https://github.com/jamesmunns/deser_n written to /workspace/builds/worker-86/source/Cargo.toml
[INFO] crate git repo https://github.com/jamesmunns/deser_n already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d457906d6c337a32a729c30834745126b36db2ae9c63ecb4c75e889496788c2f
[INFO] running `Command { std: "docker" "start" "-a" "d457906d6c337a32a729c30834745126b36db2ae9c63ecb4c75e889496788c2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d457906d6c337a32a729c30834745126b36db2ae9c63ecb4c75e889496788c2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d457906d6c337a32a729c30834745126b36db2ae9c63ecb4c75e889496788c2f", kill_on_drop: false }`
[INFO] [stdout] d457906d6c337a32a729c30834745126b36db2ae9c63ecb4c75e889496788c2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7c021f58755f1a2a90e901839e62997a46110eaf2d9bffdd194346b7ba1e5ba
[INFO] running `Command { std: "docker" "start" "-a" "d7c021f58755f1a2a90e901839e62997a46110eaf2d9bffdd194346b7ba1e5ba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling deser_n v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `len` found for type parameter `T` in the current scope
[INFO] [stdout]   --> src/main.rs:62:43
[INFO] [stdout]    |
[INFO] [stdout] 62 |             if b as usize <= self.rawdata.len() {
[INFO] [stdout]    |                                           ^^^ method not found in `T`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the type parameter is bounded by the trait
[INFO] [stdout] help: the following trait defines an item `len`, perhaps you need to restrict type parameter `T` with it:
[INFO] [stdout]    |
[INFO] [stdout] 57 | impl<T: ExactSizeIterator> Field<T> {
[INFO] [stdout]    |      ~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0608]: cannot index into a value of type `T`
[INFO] [stdout]   --> src/main.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         self.rawdata[self.cursize as usize] = b;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `deser_n` due to 3 previous errors
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0599, E0608.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d7c021f58755f1a2a90e901839e62997a46110eaf2d9bffdd194346b7ba1e5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7c021f58755f1a2a90e901839e62997a46110eaf2d9bffdd194346b7ba1e5ba", kill_on_drop: false }`
[INFO] [stdout] d7c021f58755f1a2a90e901839e62997a46110eaf2d9bffdd194346b7ba1e5ba