[INFO] updating cached repository mthomasuk/basic-rust-http-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mthomasuk/basic-rust-http-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mthomasuk/basic-rust-http-server" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/mthomasuk/basic-rust-http-server"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/mthomasuk/basic-rust-http-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mthomasuk/basic-rust-http-server" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/mthomasuk/basic-rust-http-server"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/mthomasuk/basic-rust-http-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d1a4acb4779d023e4febd2bba0d8666de17742ea
[INFO] sha for GitHub repo mthomasuk/basic-rust-http-server: d1a4acb4779d023e4febd2bba0d8666de17742ea
[INFO] validating manifest of mthomasuk/basic-rust-http-server on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mthomasuk/basic-rust-http-server on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mthomasuk/basic-rust-http-server
[INFO] finished frobbing mthomasuk/basic-rust-http-server
[INFO] frobbed toml for mthomasuk/basic-rust-http-server written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/mthomasuk/basic-rust-http-server/Cargo.toml
[INFO] started frobbing mthomasuk/basic-rust-http-server
[INFO] finished frobbing mthomasuk/basic-rust-http-server
[INFO] frobbed toml for mthomasuk/basic-rust-http-server written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/mthomasuk/basic-rust-http-server/Cargo.toml
[INFO] crate mthomasuk/basic-rust-http-server already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mthomasuk/basic-rust-http-server against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-6/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/mthomasuk/basic-rust-http-server:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5d92b6a70f1d9777292d28d9915a42a9692cc69a2612e6a58784870879942e16
[INFO] running `"docker" "start" "-a" "5d92b6a70f1d9777292d28d9915a42a9692cc69a2612e6a58784870879942e16"`
[INFO] [stderr]    Compiling serde v1.0.85
[INFO] [stderr]     Checking postgres-shared v0.4.2
[INFO] [stderr]     Checking postgres v0.15.2
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]     Checking web-serve v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/request/mod.rs:146:17
[INFO] [stderr]     |
[INFO] [stderr] 146 |             let mut mapped_json = json.join(",");
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/request/mod.rs:146:17
[INFO] [stderr]     |
[INFO] [stderr] 146 |             let mut mapped_json = json.join(",");
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.48s
[INFO] running `"docker" "inspect" "5d92b6a70f1d9777292d28d9915a42a9692cc69a2612e6a58784870879942e16"`
[INFO] running `"docker" "rm" "-f" "5d92b6a70f1d9777292d28d9915a42a9692cc69a2612e6a58784870879942e16"`
[INFO] [stdout] 5d92b6a70f1d9777292d28d9915a42a9692cc69a2612e6a58784870879942e16