[INFO] crate peekable_reader 0.0.2 is already in cache
[INFO] testing peekable_reader-0.0.2 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate peekable_reader 0.0.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate peekable_reader 0.0.2 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 crates.io crate peekable_reader 0.0.2
[INFO] finished tweaking crates.io crate peekable_reader 0.0.2
[INFO] tweaked toml for crates.io crate peekable_reader 0.0.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 075535f3adcc8834f10dd84989e1af5031d5792252696e025aec1095a91eb46f
[INFO] running `"docker" "start" "-a" "075535f3adcc8834f10dd84989e1af5031d5792252696e025aec1095a91eb46f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling peekable_reader v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> src/lib.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::old_io::IoResult;
[INFO] [stderr]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Reader` in this scope
[INFO] [stderr]   --> src/lib.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 | impl<R: Reader> PeekableReader<R> {
[INFO] [stderr]    |         ^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Reader` in this scope
[INFO] [stderr]   --> src/lib.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 | impl<R: Reader> Reader for PeekableReader<R> {
[INFO] [stderr]    |                 ^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Reader` in this scope
[INFO] [stderr]   --> src/lib.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 | impl<R: Reader> Reader for PeekableReader<R> {
[INFO] [stderr]    |         ^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:79:16
[INFO] [stderr]    |
[INFO] [stderr] 79 |             Ok(try!(self.inner.read(&mut buf[offset..])) + offset)
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0405, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0405`.
[INFO] [stderr] error: could not compile `peekable_reader`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "075535f3adcc8834f10dd84989e1af5031d5792252696e025aec1095a91eb46f"`
[INFO] running `"docker" "rm" "-f" "075535f3adcc8834f10dd84989e1af5031d5792252696e025aec1095a91eb46f"`
[INFO] [stdout] 075535f3adcc8834f10dd84989e1af5031d5792252696e025aec1095a91eb46f