[INFO] updating cached repository brianp/muxed
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/brianp/muxed
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/brianp/muxed" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/brianp/muxed"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/brianp/muxed'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/brianp/muxed" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/brianp/muxed"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/brianp/muxed'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 19b44ef523b739bbdba03e871f5c79a26d5a70b7
[INFO] sha for GitHub repo brianp/muxed: 19b44ef523b739bbdba03e871f5c79a26d5a70b7
[INFO] validating manifest of brianp/muxed on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of brianp/muxed on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing brianp/muxed
[INFO] finished frobbing brianp/muxed
[INFO] frobbed toml for brianp/muxed written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/brianp/muxed/Cargo.toml
[INFO] started frobbing brianp/muxed
[INFO] finished frobbing brianp/muxed
[INFO] frobbed toml for brianp/muxed written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/brianp/muxed/Cargo.toml
[INFO] crate brianp/muxed already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/brianp/muxed/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking brianp/muxed against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-1/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/brianp/muxed:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 08dffeb0735c2c62c4cc4758af6a0e3b1cb8d82588ac57d34b246d3b07a35ce6
[INFO] running `"docker" "start" "-a" "08dffeb0735c2c62c4cc4758af6a0e3b1cb8d82588ac57d34b246d3b07a35ce6"`
[INFO] [stderr]     Checking dtoa v0.3.1
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking docopt v0.7.0
[INFO] [stderr]    Compiling serde_codegen v0.8.23
[INFO] [stderr]     Checking serde_yaml v0.5.1
[INFO] [stderr]    Compiling serde_derive v0.8.23
[INFO] [stderr]     Checking muxed v0.7.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/load/command.rs:240:32
[INFO] [stderr]     |
[INFO] [stderr] 240 |     pub fn as_trait(&self) -> &Command {
[INFO] [stderr]     |                                ^^^^^^^ help: use `dyn`: `dyn Command`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/load/command.rs:240:32
[INFO] [stderr]     |
[INFO] [stderr] 240 |     pub fn as_trait(&self) -> &Command {
[INFO] [stderr]     |                                ^^^^^^^ help: use `dyn`: `dyn Command`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.53s
[INFO] running `"docker" "inspect" "08dffeb0735c2c62c4cc4758af6a0e3b1cb8d82588ac57d34b246d3b07a35ce6"`
[INFO] running `"docker" "rm" "-f" "08dffeb0735c2c62c4cc4758af6a0e3b1cb8d82588ac57d34b246d3b07a35ce6"`
[INFO] [stdout] 08dffeb0735c2c62c4cc4758af6a0e3b1cb8d82588ac57d34b246d3b07a35ce6