[INFO] updating cached repository mattdeboard/prepend_line
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mattdeboard/prepend_line
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mattdeboard/prepend_line" "work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/mattdeboard/prepend_line"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/mattdeboard/prepend_line'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mattdeboard/prepend_line" "work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/mattdeboard/prepend_line"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/mattdeboard/prepend_line'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e4dc1c7a8266c455ef3c617f4a8b37bd0b4b676c
[INFO] sha for GitHub repo mattdeboard/prepend_line: e4dc1c7a8266c455ef3c617f4a8b37bd0b4b676c
[INFO] validating manifest of mattdeboard/prepend_line on toolchain master#2bde39b8edce6463e1c37f8a8082a875e7b536b1
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mattdeboard/prepend_line on toolchain try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mattdeboard/prepend_line
[INFO] finished frobbing mattdeboard/prepend_line
[INFO] frobbed toml for mattdeboard/prepend_line written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/mattdeboard/prepend_line/Cargo.toml
[INFO] started frobbing mattdeboard/prepend_line
[INFO] finished frobbing mattdeboard/prepend_line
[INFO] frobbed toml for mattdeboard/prepend_line written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/mattdeboard/prepend_line/Cargo.toml
[INFO] crate mattdeboard/prepend_line has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mattdeboard/prepend_line against try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c for pr-57483
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57483/worker-4/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/mattdeboard/prepend_line:/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" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 76af86f3e572f7da252032c23da5e13f8d56769d4799cffd6a032e85258608f8
[INFO] running `"docker" "start" "-a" "76af86f3e572f7da252032c23da5e13f8d56769d4799cffd6a032e85258608f8"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.12
[INFO] [stderr]    Compiling ryu v0.2.3
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.16
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling serde v1.0.71
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking uuid v0.1.18
[INFO] [stderr]     Checking regex v1.0.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/lib.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     feature(proc_macro_raw_ident, proc_macro_span)
[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 `proc-macro2`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "76af86f3e572f7da252032c23da5e13f8d56769d4799cffd6a032e85258608f8"`
[INFO] running `"docker" "rm" "-f" "76af86f3e572f7da252032c23da5e13f8d56769d4799cffd6a032e85258608f8"`
[INFO] [stdout] 76af86f3e572f7da252032c23da5e13f8d56769d4799cffd6a032e85258608f8