[INFO] crate exonum_flamer 0.1.6 is already in cache
[INFO] testing exonum_flamer-0.1.6 against 1.38.0 for beta-1.39-1
[INFO] extracting crate exonum_flamer 0.1.6 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate exonum_flamer 0.1.6 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 exonum_flamer 0.1.6
[INFO] finished tweaking crates.io crate exonum_flamer 0.1.6
[INFO] tweaked toml for crates.io crate exonum_flamer 0.1.6 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] 9c6e7ddeed29ca631a2366f36f0922573245865cda89393fb9ec7edc232203d8
[INFO] running `"docker" "start" "-a" "9c6e7ddeed29ca631a2366f36f0922573245865cda89393fb9ec7edc232203d8"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling exonum_flamer v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:2:30
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(plugin_registrar, quote, rustc_private, custom_attribute)]
[INFO] [stderr]   |                              ^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `syntax::fold`, `syntax::fold`
[INFO] [stderr]   --> src/lib.rs:10:20
[INFO] [stderr]    |
[INFO] [stderr] 10 | use syntax::fold::{self, Folder};
[INFO] [stderr]    |             ^^^^   ^^^^ no `fold` in the root
[INFO] [stderr]    |             |
[INFO] [stderr]    |             could not find `fold` in `syntax`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `syntax::codemap`
[INFO] [stderr]   --> src/lib.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 | use syntax::codemap::{DUMMY_SP, Span};
[INFO] [stderr]    |             ^^^^^^^ could not find `codemap` in `syntax`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `syntax::util::small_vector`
[INFO] [stderr]   --> src/lib.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 | use syntax::util::small_vector::SmallVector;
[INFO] [stderr]    |                   ^^^^^^^^^^^^ could not find `small_vector` in `util`
[INFO] [stderr] 
[INFO] [stderr] error: cannot find macro `quote_block!` in this scope
[INFO] [stderr]   --> src/lib.rs:66:13
[INFO] [stderr]    |
[INFO] [stderr] 66 |             quote_block!(self.cx, {
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(plugin_registrar, quote, rustc_private, custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `exonum_flamer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9c6e7ddeed29ca631a2366f36f0922573245865cda89393fb9ec7edc232203d8"`
[INFO] running `"docker" "rm" "-f" "9c6e7ddeed29ca631a2366f36f0922573245865cda89393fb9ec7edc232203d8"`
[INFO] [stdout] 9c6e7ddeed29ca631a2366f36f0922573245865cda89393fb9ec7edc232203d8