[INFO] crate encoding 0.2.33 is already in cache
[INFO] extracting crate encoding 0.2.33 into work/ex/beta-1.37-6/sources/1.36.0/reg/encoding/0.2.33
[INFO] extracting crate encoding 0.2.33 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/encoding/0.2.33
[INFO] validating manifest of encoding-0.2.33 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 encoding-0.2.33 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 encoding-0.2.33
[INFO] removed path dependency encoding-index-japanese from encoding-0.2.33
[INFO] removed path dependency encoding-index-korean from encoding-0.2.33
[INFO] removed path dependency encoding-index-simpchinese from encoding-0.2.33
[INFO] removed path dependency encoding-index-singlebyte from encoding-0.2.33
[INFO] removed path dependency encoding-index-tradchinese from encoding-0.2.33
[INFO] finished frobbing encoding-0.2.33
[INFO] frobbed toml for encoding-0.2.33 written to work/ex/beta-1.37-6/sources/1.36.0/reg/encoding/0.2.33/Cargo.toml
[INFO] started frobbing encoding-0.2.33
[INFO] removed path dependency encoding-index-japanese from encoding-0.2.33
[INFO] removed path dependency encoding-index-korean from encoding-0.2.33
[INFO] removed path dependency encoding-index-simpchinese from encoding-0.2.33
[INFO] removed path dependency encoding-index-singlebyte from encoding-0.2.33
[INFO] removed path dependency encoding-index-tradchinese from encoding-0.2.33
[INFO] finished frobbing encoding-0.2.33
[INFO] frobbed toml for encoding-0.2.33 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/encoding/0.2.33/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 encoding-0.2.33 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/encoding/0.2.33:/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] e17ad40ea2e098c28cc05cfb45ca8b9e295aeef2df2efd1649ce9bb9dfdacc9c
[INFO] running `"docker" "start" "-a" "e17ad40ea2e098c28cc05cfb45ca8b9e295aeef2df2efd1649ce9bb9dfdacc9c"`
[INFO] [stderr]    Compiling encoding v0.2.33 (/opt/crater/workdir)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/codec/utf_16.rs:135:17
[INFO] [stderr]     |
[INFO] [stderr] 135 |                 _ => unreachable!() // XXX Rust issue #12483, this is redundant
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `"docker" "inspect" "e17ad40ea2e098c28cc05cfb45ca8b9e295aeef2df2efd1649ce9bb9dfdacc9c"`
[INFO] running `"docker" "rm" "-f" "e17ad40ea2e098c28cc05cfb45ca8b9e295aeef2df2efd1649ce9bb9dfdacc9c"`
[INFO] [stdout] e17ad40ea2e098c28cc05cfb45ca8b9e295aeef2df2efd1649ce9bb9dfdacc9c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/encoding/0.2.33:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1b72cb05cdef96a79868d292a8cfdca18e96914fb40ae5c344d730d61bf0a1cd
[INFO] running `"docker" "start" "-a" "1b72cb05cdef96a79868d292a8cfdca18e96914fb40ae5c344d730d61bf0a1cd"`
[INFO] [stderr]    Compiling encoding v0.2.33 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> src/lib.rs:207:19
[INFO] [stderr]     |
[INFO] [stderr] 207 | #![cfg_attr(test, feature(test))] // lib stability features as per RFC #507
[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 `encoding`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1b72cb05cdef96a79868d292a8cfdca18e96914fb40ae5c344d730d61bf0a1cd"`
[INFO] running `"docker" "rm" "-f" "1b72cb05cdef96a79868d292a8cfdca18e96914fb40ae5c344d730d61bf0a1cd"`
[INFO] [stdout] 1b72cb05cdef96a79868d292a8cfdca18e96914fb40ae5c344d730d61bf0a1cd