[INFO] crate clementine 0.0.1 is already in cache
[INFO] extracting crate clementine 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/clementine/0.0.1
[INFO] extracting crate clementine 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/clementine/0.0.1
[INFO] validating manifest of clementine-0.0.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of clementine-0.0.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing clementine-0.0.1
[INFO] finished frobbing clementine-0.0.1
[INFO] frobbed toml for clementine-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/clementine/0.0.1/Cargo.toml
[INFO] started frobbing clementine-0.0.1
[INFO] finished frobbing clementine-0.0.1
[INFO] frobbed toml for clementine-0.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/clementine/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing clementine-0.0.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/clementine/0.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] f0c6d7f6b4ac5419b32e1fea218558fef6c45f992d62d4927bfde0b329dc74d9
[INFO] running `"docker" "start" "-a" "f0c6d7f6b4ac5419b32e1fea218558fef6c45f992d62d4927bfde0b329dc74d9"`
[INFO] [stderr]    Compiling clementine v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]    --> src/error.rs:101:15
[INFO] [stderr]     |
[INFO] [stderr] 101 | impl From<io::CharsError> for Error {
[INFO] [stderr]     |               ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]    --> src/error.rs:102:20
[INFO] [stderr]     |
[INFO] [stderr] 102 |     fn from(_: io::CharsError) -> Error {
[INFO] [stderr]     |                    ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::fs::File` in the current scope
[INFO] [stderr]   --> src/persist.rs:98:47
[INFO] [stderr]    |
[INFO] [stderr] 98 |         for ch in fs::File::open(&self.path)?.chars() {
[INFO] [stderr]    |                                               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/persist.rs:3:22
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Write, Read};
[INFO] [stderr]   |                      ^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: Could not compile `clementine`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f0c6d7f6b4ac5419b32e1fea218558fef6c45f992d62d4927bfde0b329dc74d9"`
[INFO] running `"docker" "rm" "-f" "f0c6d7f6b4ac5419b32e1fea218558fef6c45f992d62d4927bfde0b329dc74d9"`
[INFO] [stdout] f0c6d7f6b4ac5419b32e1fea218558fef6c45f992d62d4927bfde0b329dc74d9