[INFO] cloning repository https://github.com/bholt/scarlet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bholt/scarlet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbholt%2Fscarlet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbholt%2Fscarlet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52266255bc99d2185fd17282c27b93e3f21cd6bd
[INFO] checking bholt/scarlet against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbholt%2Fscarlet" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bholt/scarlet on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bholt/scarlet
[INFO] finished tweaking git repo https://github.com/bholt/scarlet
[INFO] tweaked toml for git repo https://github.com/bholt/scarlet written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/bholt/scarlet already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/mitsuhiko/redis-rs.git`
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/mitsuhiko/redis-rs.git`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ef4bb1d6984dcfdc497b0255084d66b219b6be360d3f5220f964ca0401193c5e
[INFO] running `Command { std: "docker" "start" "-a" "ef4bb1d6984dcfdc497b0255084d66b219b6be360d3f5220f964ca0401193c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef4bb1d6984dcfdc497b0255084d66b219b6be360d3f5220f964ca0401193c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef4bb1d6984dcfdc497b0255084d66b219b6be360d3f5220f964ca0401193c5e", kill_on_drop: false }`
[INFO] [stdout] ef4bb1d6984dcfdc497b0255084d66b219b6be360d3f5220f964ca0401193c5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 010d2ec7ef6f71a83f411deacfc689065f93dd1479f1dd49785c775b51661913
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "010d2ec7ef6f71a83f411deacfc689065f93dd1479f1dd49785c775b51661913", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking dtoa v0.4.7
[INFO] [stderr]     Checking tinyvec v1.1.1
[INFO] [stderr]     Checking combine v4.5.2
[INFO] [stderr]     Checking unicode-normalization v0.1.16
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]     Checking redis v0.19.1-alpha.0 (https://github.com/mitsuhiko/redis-rs.git#7a067b8f)
[INFO] [stderr]     Checking scarlet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     try!(c.set("foo", 42));
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     try!(c.set("foo", 42));
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*c` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/main.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 9  | fn check(c: &Connection) -> RedisResult<isize> {
[INFO] [stdout]    |             ----------- help: consider changing this to be a mutable reference: `&mut Connection`
[INFO] [stdout] 10 |     try!(c.set("foo", 42));
[INFO] [stdout]    |          ^ `c` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*c` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | fn check(c: &Connection) -> RedisResult<isize> {
[INFO] [stdout]    |             ----------- help: consider changing this to be a mutable reference: `&mut Connection`
[INFO] [stdout] 10 |     try!(c.set("foo", 42));
[INFO] [stdout] 11 |     c.get("foo") as RedisResult<isize>
[INFO] [stdout]    |     ^ `c` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*c` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn set(&self, c: &Connection) -> RedisResult<()> {
[INFO] [stdout]    |                      ----------- help: consider changing this to be a mutable reference: `&mut Connection`
[INFO] [stdout] 52 |         c.hset_multiple(Self::key(self.id), argmap!(
[INFO] [stdout]    |         ^ `c` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `c` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:78:27
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let c = client.get_connection().unwrap();
[INFO] [stdout]    |         - help: consider changing this to be mutable: `mut c`
[INFO] [stdout] ...
[INFO] [stdout] 78 |     let r : Vec<String> = c.hget(User::key(u.id), &["username","first","last"]).unwrap();
[INFO] [stdout]    |                           ^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*c` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/main.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 9  | fn check(c: &Connection) -> RedisResult<isize> {
[INFO] [stdout]    |             ----------- help: consider changing this to be a mutable reference: `&mut Connection`
[INFO] [stdout] 10 |     try!(c.set("foo", 42));
[INFO] [stdout]    |          ^ `c` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*c` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | fn check(c: &Connection) -> RedisResult<isize> {
[INFO] [stdout]    |             ----------- help: consider changing this to be a mutable reference: `&mut Connection`
[INFO] [stdout] 10 |     try!(c.set("foo", 42));
[INFO] [stdout] 11 |     c.get("foo") as RedisResult<isize>
[INFO] [stdout]    |     ^ `c` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `*c` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn set(&self, c: &Connection) -> RedisResult<()> {
[INFO] [stdout]    |                      ----------- help: consider changing this to be a mutable reference: `&mut Connection`
[INFO] [stdout] 52 |         c.hset_multiple(Self::key(self.id), argmap!(
[INFO] [stdout]    |         ^ `c` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `c` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:78:27
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let c = client.get_connection().unwrap();
[INFO] [stdout]    |         - help: consider changing this to be mutable: `mut c`
[INFO] [stdout] ...
[INFO] [stdout] 78 |     let r : Vec<String> = c.hget(User::key(u.id), &["username","first","last"]).unwrap();
[INFO] [stdout]    |                           ^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scarlet`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "010d2ec7ef6f71a83f411deacfc689065f93dd1479f1dd49785c775b51661913", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "010d2ec7ef6f71a83f411deacfc689065f93dd1479f1dd49785c775b51661913", kill_on_drop: false }`
[INFO] [stdout] 010d2ec7ef6f71a83f411deacfc689065f93dd1479f1dd49785c775b51661913