[INFO] updating cached repository https://github.com/bholt/scarlet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52266255bc99d2185fd17282c27b93e3f21cd6bd
[INFO] checking bholt/scarlet against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbholt%2Fscarlet" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bholt/scarlet on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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-9/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" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-9/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[INFO] the lockfile is outdated, regenerating it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" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/mitsuhiko/redis-rs.git`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be2e627a7b35a281c2c6301b8b92f26607dc68ff2ba7a05486d92020bc0661aa
[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" "be2e627a7b35a281c2c6301b8b92f26607dc68ff2ba7a05486d92020bc0661aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be2e627a7b35a281c2c6301b8b92f26607dc68ff2ba7a05486d92020bc0661aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be2e627a7b35a281c2c6301b8b92f26607dc68ff2ba7a05486d92020bc0661aa", kill_on_drop: false }`
[INFO] [stdout] be2e627a7b35a281c2c6301b8b92f26607dc68ff2ba7a05486d92020bc0661aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89fe6e255d66627dee9e25d5e1903ca7ecf8033c5fa3ddbe5220be0301f84619
[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" "89fe6e255d66627dee9e25d5e1903ca7ecf8033c5fa3ddbe5220be0301f84619", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking dtoa v0.4.5
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking kv-log-macro v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]    Compiling async-trait v0.1.35
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking piper v0.1.3
[INFO] [stderr]     Checking combine v4.2.1
[INFO] [stderr]     Checking smol v0.1.12
[INFO] [stderr]     Checking async-std v1.6.1
[INFO] [stderr]     Checking redis v0.16.1-alpha.0 (https://github.com/mitsuhiko/redis-rs.git#28ca9e2f)
[INFO] [stderr]     Checking scarlet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item '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 item '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 redis::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 redis::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 redis::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[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 redis::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 redis::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: 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: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 redis::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] [stderr] error: could not compile `scarlet`.
[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] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "89fe6e255d66627dee9e25d5e1903ca7ecf8033c5fa3ddbe5220be0301f84619", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89fe6e255d66627dee9e25d5e1903ca7ecf8033c5fa3ddbe5220be0301f84619", kill_on_drop: false }`
[INFO] [stdout] 89fe6e255d66627dee9e25d5e1903ca7ecf8033c5fa3ddbe5220be0301f84619