[INFO] cloning repository https://github.com/badboy/redis-zrangescore-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/badboy/redis-zrangescore-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadboy%2Fredis-zrangescore-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadboy%2Fredis-zrangescore-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] abad98290532d88cda71b3da3057757ca31551f4
[INFO] checking badboy/redis-zrangescore-example against master#cfbc6d4cf1acbac5c025acf8ed68929caa551df3 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadboy%2Fredis-zrangescore-example" "/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/badboy/redis-zrangescore-example on toolchain cfbc6d4cf1acbac5c025acf8ed68929caa551df3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/badboy/redis-zrangescore-example
[INFO] finished tweaking git repo https://github.com/badboy/redis-zrangescore-example
[INFO] tweaked toml for git repo https://github.com/badboy/redis-zrangescore-example written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/badboy/redis-zrangescore-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/mitsuhiko/redis-rs/`
[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[INFO] the lockfile is outdated, regenerating it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" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/mitsuhiko/redis-rs/`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52a77a7987e6b1115fd64f20f240c1d8ef32e7f7c1357ca7d9d9b918e125543a
[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" "52a77a7987e6b1115fd64f20f240c1d8ef32e7f7c1357ca7d9d9b918e125543a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52a77a7987e6b1115fd64f20f240c1d8ef32e7f7c1357ca7d9d9b918e125543a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52a77a7987e6b1115fd64f20f240c1d8ef32e7f7c1357ca7d9d9b918e125543a", kill_on_drop: false }`
[INFO] [stdout] 52a77a7987e6b1115fd64f20f240c1d8ef32e7f7c1357ca7d9d9b918e125543a
[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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a0600b2999d5e2e9d3378d5a809ae4c112eebef90667fe4aa487c30cd70bd28
[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" "2a0600b2999d5e2e9d3378d5a809ae4c112eebef90667fe4aa487c30cd70bd28", 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] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling autocfg v1.0.1
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[INFO] [stderr]     Checking num_cpus v1.13.0
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[INFO] [stderr]     Checking async-executor v0.1.2
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[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking combine v4.2.1
[INFO] [stderr]     Checking redis v0.17.1-alpha.0 (https://github.com/mitsuhiko/redis-rs/#7a3a4c2d)
[INFO] [stderr]     Checking redis-zrangescore-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]  --> src/main.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let client = try!(redis::Client::open("redis://127.0.0.1/"));
[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:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let con = try!(client.get_connection());
[INFO] [stdout]   |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _ : () = try!(con.del("myzset"));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let _ : () = try!(con.zadd("myzset", "one", 1));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ : () = try!(con.zadd("myzset", "two", 2));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:14:18
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let _ : () = try!(con.zadd("myzset", "three", 3));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:16:30
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:19:36
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let zset : Vec<(String,u32)> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:28:30
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("non-existent-set", 0, 3));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]  --> src/main.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let client = try!(redis::Client::open("redis://127.0.0.1/"));
[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:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let con = try!(client.get_connection());
[INFO] [stdout]   |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _ : () = try!(con.del("myzset"));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let _ : () = try!(con.zadd("myzset", "one", 1));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ : () = try!(con.zadd("myzset", "two", 2));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:14:18
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let _ : () = try!(con.zadd("myzset", "three", 3));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:16:30
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:19:36
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let zset : Vec<(String,u32)> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:28:30
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("non-existent-set", 0, 3));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] 10 |     // throw away the result, just make sure it does not fail
[INFO] [stdout] 11 |     let _ : () = try!(con.del("myzset"));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 12 |     let _ : () = try!(con.zadd("myzset", "one", 1));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 13 |     let _ : () = try!(con.zadd("myzset", "two", 2));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 14 |     let _ : () = try!(con.zadd("myzset", "three", 3));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 16 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                                   ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:19:41
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 19 |     let zset : Vec<(String,u32)> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                                         ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:22:49
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 22 |     let res : redis::RedisResult<Vec<String>> = con.zrangebyscore_withscores("myzset", 0, 3);
[INFO] [stdout]    |                                                 ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:28:35
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 28 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("non-existent-set", 0, 3));
[INFO] [stdout]    |                                   ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 9 warnings 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 `redis-zrangescore-example`.
[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[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] 10 |     // throw away the result, just make sure it does not fail
[INFO] [stdout] 11 |     let _ : () = try!(con.del("myzset"));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 12 |     let _ : () = try!(con.zadd("myzset", "one", 1));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 13 |     let _ : () = try!(con.zadd("myzset", "two", 2));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 14 |     let _ : () = try!(con.zadd("myzset", "three", 3));
[INFO] [stdout]    |                       ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 16 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                                   ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:19:41
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 19 |     let zset : Vec<(String,u32)> = try!(con.zrangebyscore_withscores("myzset", 0, 3));
[INFO] [stdout]    |                                         ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:22:49
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 22 |     let res : redis::RedisResult<Vec<String>> = con.zrangebyscore_withscores("myzset", 0, 3);
[INFO] [stdout]    |                                                 ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `con` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/main.rs:28:35
[INFO] [stdout]    |
[INFO] [stdout] 9  |     let con = try!(client.get_connection());
[INFO] [stdout]    |         --- help: consider changing this to be mutable: `mut con`
[INFO] [stdout] ...
[INFO] [stdout] 28 |     let zset : Vec<String> = try!(con.zrangebyscore_withscores("non-existent-set", 0, 3));
[INFO] [stdout]    |                                   ^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 9 warnings 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" "2a0600b2999d5e2e9d3378d5a809ae4c112eebef90667fe4aa487c30cd70bd28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a0600b2999d5e2e9d3378d5a809ae4c112eebef90667fe4aa487c30cd70bd28", kill_on_drop: false }`
[INFO] [stdout] 2a0600b2999d5e2e9d3378d5a809ae4c112eebef90667fe4aa487c30cd70bd28
