[INFO] cloning repository thepowersgang/equation-editor
[INFO] running `"git" "clone" "--bare" "git://github.com/thepowersgang/equation-editor.git" "work/cache/sources/gh/thepowersgang/equation-editor"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/thepowersgang/equation-editor'...
[INFO] running `"git" "clone" "work/cache/sources/gh/thepowersgang/equation-editor" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/thepowersgang/equation-editor"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/thepowersgang/equation-editor'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thepowersgang/equation-editor" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/thepowersgang/equation-editor"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/thepowersgang/equation-editor'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 15154bb2fd052e8541de4131b0fa16a2cfa9d7c4
[INFO] sha for GitHub repo thepowersgang/equation-editor: 15154bb2fd052e8541de4131b0fa16a2cfa9d7c4
[INFO] validating manifest of thepowersgang/equation-editor on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of thepowersgang/equation-editor on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing thepowersgang/equation-editor
[INFO] finished frobbing thepowersgang/equation-editor
[INFO] frobbed toml for thepowersgang/equation-editor written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/thepowersgang/equation-editor/Cargo.toml
[INFO] started frobbing thepowersgang/equation-editor
[INFO] finished frobbing thepowersgang/equation-editor
[INFO] frobbed toml for thepowersgang/equation-editor written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/thepowersgang/equation-editor/Cargo.toml
[INFO] crate thepowersgang/equation-editor already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking thepowersgang/equation-editor against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-5/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/thepowersgang/equation-editor:/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" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d04ffddacba3252e928569a691fa32aadc90ee2b98007a93d2c3a5c444e54771
[INFO] running `"docker" "start" "-a" "d04ffddacba3252e928569a691fa32aadc90ee2b98007a93d2c3a5c444e54771"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling pkg-config v0.3.13
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling lalr v0.0.2
[INFO] [stderr]    Compiling cmake v0.1.33
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking log v0.4.4
[INFO] [stderr]     Checking backtrace-sys v0.1.24
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling ui-sys v0.1.3
[INFO] [stderr]    Compiling redfa v0.0.2
[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-macro2-0.4.13/src/unstable.rs:359:27
[INFO] [stderr]     |
[INFO] [stderr] 359 |             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" "d04ffddacba3252e928569a691fa32aadc90ee2b98007a93d2c3a5c444e54771"`
[INFO] running `"docker" "rm" "-f" "d04ffddacba3252e928569a691fa32aadc90ee2b98007a93d2c3a5c444e54771"`
[INFO] [stdout] d04ffddacba3252e928569a691fa32aadc90ee2b98007a93d2c3a5c444e54771