[INFO] crate serde-fressian 0.1.1 is already in cache
[INFO] extracting crate serde-fressian 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/serde-fressian/0.1.1
[INFO] extracting crate serde-fressian 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-fressian/0.1.1
[INFO] validating manifest of serde-fressian-0.1.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of serde-fressian-0.1.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing serde-fressian-0.1.1
[INFO] finished frobbing serde-fressian-0.1.1
[INFO] frobbed toml for serde-fressian-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/serde-fressian/0.1.1/Cargo.toml
[INFO] started frobbing serde-fressian-0.1.1
[INFO] finished frobbing serde-fressian-0.1.1
[INFO] frobbed toml for serde-fressian-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-fressian/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing serde-fressian-0.1.1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-fressian/0.1.1:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5e21cd0b99ea238ce5115a1fc2b8a39d91077363d4777514b3d891f6ae0eb077
[INFO] running `"docker" "start" "-a" "5e21cd0b99ea238ce5115a1fc2b8a39d91077363d4777514b3d891f6ae0eb077"`
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling ordered-float v0.5.2
[INFO] [stderr]    Compiling shrinkwraprs v0.2.1
[INFO] [stderr]    Compiling serde-fressian v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.58s
[INFO] running `"docker" "inspect" "5e21cd0b99ea238ce5115a1fc2b8a39d91077363d4777514b3d891f6ae0eb077"`
[INFO] running `"docker" "rm" "-f" "5e21cd0b99ea238ce5115a1fc2b8a39d91077363d4777514b3d891f6ae0eb077"`
[INFO] [stdout] 5e21cd0b99ea238ce5115a1fc2b8a39d91077363d4777514b3d891f6ae0eb077
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-fressian/0.1.1:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] eced01816c6c006bb998c968bfa87684f3d284be4477549dced9d8b817975868
[INFO] running `"docker" "start" "-a" "eced01816c6c006bb998c968bfa87684f3d284be4477549dced9d8b817975868"`
[INFO] [stderr]    Compiling serde-fressian v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> tests/value_tests.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> tests/ser_test.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(custom_attribute)]
[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 `serde-fressian`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> tests/rt.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> tests/types_test.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(custom_attribute)]
[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 `serde-fressian`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `serde-fressian`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `serde-fressian`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "eced01816c6c006bb998c968bfa87684f3d284be4477549dced9d8b817975868"`
[INFO] running `"docker" "rm" "-f" "eced01816c6c006bb998c968bfa87684f3d284be4477549dced9d8b817975868"`
[INFO] [stdout] eced01816c6c006bb998c968bfa87684f3d284be4477549dced9d8b817975868