[INFO] updating cached repository knowtheory/s3_log_parse
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/knowtheory/s3_log_parse
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/knowtheory/s3_log_parse" "work/ex/beta-1.38-1/sources/1.37.0/gh/knowtheory/s3_log_parse"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/knowtheory/s3_log_parse'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/knowtheory/s3_log_parse" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knowtheory/s3_log_parse"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knowtheory/s3_log_parse'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f18268b3aff6af67605ba0da503a4814a3a7c24f
[INFO] sha for GitHub repo knowtheory/s3_log_parse: f18268b3aff6af67605ba0da503a4814a3a7c24f
[INFO] validating manifest of knowtheory/s3_log_parse on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of knowtheory/s3_log_parse on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing knowtheory/s3_log_parse
[INFO] finished frobbing knowtheory/s3_log_parse
[INFO] frobbed toml for knowtheory/s3_log_parse written to work/ex/beta-1.38-1/sources/1.37.0/gh/knowtheory/s3_log_parse/Cargo.toml
[INFO] started frobbing knowtheory/s3_log_parse
[INFO] finished frobbing knowtheory/s3_log_parse
[INFO] frobbed toml for knowtheory/s3_log_parse written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knowtheory/s3_log_parse/Cargo.toml
[INFO] crate knowtheory/s3_log_parse already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/knowtheory/s3_log_parse/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing knowtheory/s3_log_parse against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/knowtheory/s3_log_parse:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 905b8aa26ac7f1cd2c07c104253e5252dabd78e1a3a73112af03c2411f0bdc5e
[INFO] running `"docker" "start" "-a" "905b8aa26ac7f1cd2c07c104253e5252dabd78e1a3a73112af03c2411f0bdc5e"`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling regex-automata v0.1.8
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling bstr v0.2.7
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling csv v1.1.1
[INFO] [stderr]    Compiling s3_log_parser v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::io::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `from_buffer` found for type `csv::Writer<_>` in the current scope
[INFO] [stderr]   --> src/main.rs:91:48
[INFO] [stderr]    |
[INFO] [stderr] 91 |             let mut output_csv  = csv::Writer::from_buffer(buf_write);
[INFO] [stderr]    |                                                ^^^^^^^^^^^ function or associated item not found in `csv::Writer<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::io::BufReader<&std::fs::File>` in the current scope
[INFO] [stderr]   --> src/main.rs:97:32
[INFO] [stderr]    |
[INFO] [stderr] 97 |             for c_wrap in file.chars() {
[INFO] [stderr]    |                                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `s3_log_parser`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "905b8aa26ac7f1cd2c07c104253e5252dabd78e1a3a73112af03c2411f0bdc5e"`
[INFO] running `"docker" "rm" "-f" "905b8aa26ac7f1cd2c07c104253e5252dabd78e1a3a73112af03c2411f0bdc5e"`
[INFO] [stdout] 905b8aa26ac7f1cd2c07c104253e5252dabd78e1a3a73112af03c2411f0bdc5e