[INFO] updating cached repository lbcdec/lbcdec
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lbcdec/lbcdec
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lbcdec/lbcdec" "work/ex/beta-1.37-6/sources/1.36.0/gh/lbcdec/lbcdec"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/lbcdec/lbcdec'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lbcdec/lbcdec" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/lbcdec/lbcdec"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/lbcdec/lbcdec'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db7d3f95ae6dac9e6d9e1b86829896954abea6d1
[INFO] sha for GitHub repo lbcdec/lbcdec: db7d3f95ae6dac9e6d9e1b86829896954abea6d1
[INFO] validating manifest of lbcdec/lbcdec 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 lbcdec/lbcdec 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 lbcdec/lbcdec
[INFO] finished frobbing lbcdec/lbcdec
[INFO] frobbed toml for lbcdec/lbcdec written to work/ex/beta-1.37-6/sources/1.36.0/gh/lbcdec/lbcdec/Cargo.toml
[INFO] started frobbing lbcdec/lbcdec
[INFO] finished frobbing lbcdec/lbcdec
[INFO] frobbed toml for lbcdec/lbcdec written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/lbcdec/lbcdec/Cargo.toml
[INFO] crate lbcdec/lbcdec already has a lockfile, it will not be regenerated
[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 lbcdec/lbcdec 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-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/lbcdec/lbcdec:/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] 6a5954994efdbdd53ba19b218ee3779dd9e9541c52972a9283158bb7a764a761
[INFO] running `"docker" "start" "-a" "6a5954994efdbdd53ba19b218ee3779dd9e9541c52972a9283158bb7a764a761"`
[INFO] [stderr]    Compiling obstack v0.1.3
[INFO] [stderr]    Compiling rand v0.5.4
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling tempfile v3.0.3
[INFO] [stderr]    Compiling lbcdec v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | #![feature(test)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Left`, `Right`
[INFO] [stderr]   --> src/main.rs:47:22
[INFO] [stderr]    |
[INFO] [stderr] 47 | use either::{Either, Left, Right};
[INFO] [stderr]    |                      ^^^^  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `obstack`
[INFO] [stderr]  --> src/ast/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use obstack;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Either`
[INFO] [stderr]  --> src/instruction_definitions.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::Either;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Count`, `RK`, `UsageType`
[INFO] [stderr]  --> src/ralloc.rs:5:71
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::instruction_definitions::{LuaInstruction, InstructionInfo, UsageType, Count, RegOrTop, Reg, RK};
[INFO] [stderr]   |                                                                       ^^^^^^^^^  ^^^^^                 ^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `lbcdec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6a5954994efdbdd53ba19b218ee3779dd9e9541c52972a9283158bb7a764a761"`
[INFO] running `"docker" "rm" "-f" "6a5954994efdbdd53ba19b218ee3779dd9e9541c52972a9283158bb7a764a761"`
[INFO] [stdout] 6a5954994efdbdd53ba19b218ee3779dd9e9541c52972a9283158bb7a764a761