[INFO] updating cached repository https://github.com/SamuelMarks/rust-playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 436a6d87e5ee54c7b48bcfd6bb0a9f75c2ba9273
[INFO] testing SamuelMarks/rust-playground against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSamuelMarks%2Frust-playground" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SamuelMarks/rust-playground on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/SamuelMarks/rust-playground
[INFO] finished tweaking git repo https://github.com/SamuelMarks/rust-playground
[INFO] tweaked toml for git repo https://github.com/SamuelMarks/rust-playground written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/SamuelMarks/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0c2e153e7ed22e2ab80c6c90a30cb8d8083d9dc5aa9631e9fae52aa7a8438111
[INFO] running `"docker" "start" "-a" "0c2e153e7ed22e2ab80c6c90a30cb8d8083d9dc5aa9631e9fae52aa7a8438111"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde v1.0.81
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]    Compiling serde_derive v1.0.81
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing crate `core`?
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use core::num::ParseIntError;
[INFO] [stderr]    |     ^^^^ maybe a missing crate `core`?
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `ParseIntError` in this scope
[INFO] [stderr]   --> src/main.rs:66:16
[INFO] [stderr]    |
[INFO] [stderr] 66 |     type Err = ParseIntError;
[INFO] [stderr]    |                ^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: consider importing this struct
[INFO] [stderr]    |
[INFO] [stderr] 9  | use std::num::ParseIntError;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0283]: type annotations needed
[INFO] [stderr]   --> src/main.rs:53:32
[INFO] [stderr]    |
[INFO] [stderr] 53 |     #[serde(deserialize_with = "string_or_struct")]
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T` declared on the function `string_or_struct`
[INFO] [stderr] ...
[INFO] [stderr] 74 | fn string_or_struct<'de, T, D>(deserializer: D) -> Result<Option<Script>, D::Error>
[INFO] [stderr]    |    ---------------- required by a bound in this
[INFO] [stderr] 75 | where
[INFO] [stderr] 76 |     T: Deserialize<'de> + FromStr<Err = Void>,
[INFO] [stderr]    |        ---------------- required by this bound in `string_or_struct`
[INFO] [stderr]    |
[INFO] [stderr]    = note: cannot satisfy `_: serde::Deserialize<'_>`
[INFO] [stderr] help: consider specifying the type arguments in the function call
[INFO] [stderr]    |
[INFO] [stderr] 53 |     #[serde(deserialize_with = "string_or_struct"::<'de, T, D>)]
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `std::option::Option<Script>: std::str::FromStr` is not satisfied
[INFO] [stderr]    --> src/main.rs:115:18
[INFO] [stderr]     |
[INFO] [stderr] 115 |     deserializer.deserialize_any(StringOrStruct(PhantomData))
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ the trait `std::str::FromStr` is not implemented for `std::option::Option<Script>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: required because of the requirements on the impl of `serde::de::Visitor<'de>` for `string_or_struct::StringOrStruct<std::option::Option<Script>>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0283, E0412, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `rust-playground`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0c2e153e7ed22e2ab80c6c90a30cb8d8083d9dc5aa9631e9fae52aa7a8438111"`
[INFO] running `"docker" "rm" "-f" "0c2e153e7ed22e2ab80c6c90a30cb8d8083d9dc5aa9631e9fae52aa7a8438111"`
[INFO] [stdout] 0c2e153e7ed22e2ab80c6c90a30cb8d8083d9dc5aa9631e9fae52aa7a8438111