[INFO] crate pocket_prover 0.6.0 is already in cache
[INFO] testing pocket_prover-0.6.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate pocket_prover 0.6.0 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate pocket_prover 0.6.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate pocket_prover 0.6.0
[INFO] finished tweaking crates.io crate pocket_prover 0.6.0
[INFO] tweaked toml for crates.io crate pocket_prover 0.6.0 written to work/builds/worker-6/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 235ef88a810ede1572619ea3c4d7791af60e834ff9c61e333518537841981dee
[INFO] running `"docker" "start" "-a" "235ef88a810ede1572619ea3c4d7791af60e834ff9c61e333518537841981dee"`
[INFO] [stderr]    Compiling pocket_prover v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:144:35
[INFO] [stderr]     |
[INFO] [stderr] 144 | pub fn countn(n: usize, fun: &mut FnMut(&[u64]) -> u64) -> u64 {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u64]) -> u64`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "235ef88a810ede1572619ea3c4d7791af60e834ff9c61e333518537841981dee"`
[INFO] running `"docker" "rm" "-f" "235ef88a810ede1572619ea3c4d7791af60e834ff9c61e333518537841981dee"`
[INFO] [stdout] 235ef88a810ede1572619ea3c4d7791af60e834ff9c61e333518537841981dee
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] fc01a7f460516e203dda6a2e7f3d4a2823216de8f69c44558370aa0d3c143421
[INFO] running `"docker" "start" "-a" "fc01a7f460516e203dda6a2e7f3d4a2823216de8f69c44558370aa0d3c143421"`
[INFO] [stderr]    Compiling pocket_prover v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> examples/vars.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[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 `pocket_prover`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:144:35
[INFO] [stderr]     |
[INFO] [stderr] 144 | pub fn countn(n: usize, fun: &mut FnMut(&[u64]) -> u64) -> u64 {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u64]) -> u64`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "fc01a7f460516e203dda6a2e7f3d4a2823216de8f69c44558370aa0d3c143421"`
[INFO] running `"docker" "rm" "-f" "fc01a7f460516e203dda6a2e7f3d4a2823216de8f69c44558370aa0d3c143421"`
[INFO] [stdout] fc01a7f460516e203dda6a2e7f3d4a2823216de8f69c44558370aa0d3c143421