[INFO] updating cached repository MeetMon/MeetMon-BackEnd
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MeetMon/MeetMon-BackEnd
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MeetMon/MeetMon-BackEnd" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/MeetMon/MeetMon-BackEnd"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/MeetMon/MeetMon-BackEnd'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MeetMon/MeetMon-BackEnd" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/MeetMon/MeetMon-BackEnd"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/MeetMon/MeetMon-BackEnd'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 754b3734cc852cf50dc4e81a604ff6baf60a0660
[INFO] sha for GitHub repo MeetMon/MeetMon-BackEnd: 754b3734cc852cf50dc4e81a604ff6baf60a0660
[INFO] validating manifest of MeetMon/MeetMon-BackEnd on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of MeetMon/MeetMon-BackEnd on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing MeetMon/MeetMon-BackEnd
[INFO] finished frobbing MeetMon/MeetMon-BackEnd
[INFO] frobbed toml for MeetMon/MeetMon-BackEnd written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/MeetMon/MeetMon-BackEnd/Cargo.toml
[INFO] started frobbing MeetMon/MeetMon-BackEnd
[INFO] finished frobbing MeetMon/MeetMon-BackEnd
[INFO] frobbed toml for MeetMon/MeetMon-BackEnd written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/MeetMon/MeetMon-BackEnd/Cargo.toml
[INFO] crate MeetMon/MeetMon-BackEnd already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking MeetMon/MeetMon-BackEnd against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-7/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/MeetMon/MeetMon-BackEnd:/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 64cb70d889561e057059210bb8b1c72aecad3e6efddc051cfe32efb64204deff
[INFO] running `"docker" "start" "-a" "64cb70d889561e057059210bb8b1c72aecad3e6efddc051cfe32efb64204deff"`
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking matches v0.1.7
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]     Checking state v0.4.1
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking try_from v0.2.2
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking md5 v0.3.7
[INFO] [stderr]     Checking data-encoding v2.1.1
[INFO] [stderr]     Checking separator v0.3.1
[INFO] [stderr]     Checking bufstream v0.1.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]     Checking isatty v0.1.8
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
[INFO] [stderr]     |
[INFO] [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/54724
[INFO] [stderr]     = help: add `#![feature(proc_macro_def_site)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[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" "64cb70d889561e057059210bb8b1c72aecad3e6efddc051cfe32efb64204deff"`
[INFO] running `"docker" "rm" "-f" "64cb70d889561e057059210bb8b1c72aecad3e6efddc051cfe32efb64204deff"`
[INFO] [stdout] 64cb70d889561e057059210bb8b1c72aecad3e6efddc051cfe32efb64204deff