[INFO] updating cached repository yberreby/benchmarks
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yberreby/benchmarks
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yberreby/benchmarks" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/yberreby/benchmarks"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/yberreby/benchmarks'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yberreby/benchmarks" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/yberreby/benchmarks"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/yberreby/benchmarks'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2815509e178888da003eeab674c296fa9d17b791
[INFO] sha for GitHub repo yberreby/benchmarks: 2815509e178888da003eeab674c296fa9d17b791
[INFO] validating manifest of yberreby/benchmarks on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yberreby/benchmarks on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yberreby/benchmarks
[INFO] finished frobbing yberreby/benchmarks
[INFO] frobbed toml for yberreby/benchmarks written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/yberreby/benchmarks/Cargo.toml
[INFO] started frobbing yberreby/benchmarks
[INFO] finished frobbing yberreby/benchmarks
[INFO] frobbed toml for yberreby/benchmarks written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/yberreby/benchmarks/Cargo.toml
[INFO] crate yberreby/benchmarks has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking yberreby/benchmarks against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-5/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/yberreby/benchmarks:/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=forbid" "-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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ac13331762f7eda4246bd9bed79cc8dd542981cbfd018a4479d48aeeaa80c7af
[INFO] running `"docker" "start" "-a" "ac13331762f7eda4246bd9bed79cc8dd542981cbfd018a4479d48aeeaa80c7af"`
[INFO] [stderr]     Checking libc v0.2.8
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking chan v0.1.18
[INFO] [stderr]     Checking benchmarks v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> benches/channels.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] error[E0433]: failed to resolve: could not find `heap` in `alloc`
[INFO] [stderr]   --> benches/alloc.rs:11:14
[INFO] [stderr]    |
[INFO] [stderr] 11 |       alloc::heap::allocate(4, 64)
[INFO] [stderr]    |              ^^^^ could not find `heap` in `alloc`
[INFO] [stderr] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `benchmarks`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]   --> benches/channels.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let sum = get_data_sum(data.iter().cloned());
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_sum`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> benches/channels.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let data = data.clone();
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `heap_api`
[INFO] [stderr]  --> benches/channels.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test, alloc, heap_api)]
[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 E0635`.
[INFO] [stderr] error: Could not compile `benchmarks`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0635]: unknown feature `str_char`
[INFO] [stderr]  --> benches/char_at.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(str_char)]
[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 E0635`.
[INFO] [stderr] error: Could not compile `benchmarks`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ac13331762f7eda4246bd9bed79cc8dd542981cbfd018a4479d48aeeaa80c7af"`
[INFO] running `"docker" "rm" "-f" "ac13331762f7eda4246bd9bed79cc8dd542981cbfd018a4479d48aeeaa80c7af"`
[INFO] [stdout] ac13331762f7eda4246bd9bed79cc8dd542981cbfd018a4479d48aeeaa80c7af