[INFO] updating cached repository https://github.com/droundy/rust-student-pairs
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6f0336852dfeab45de375fd1cffd3e888455870c
[INFO] testing droundy/rust-student-pairs against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdroundy%2Frust-student-pairs" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/droundy/rust-student-pairs on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/droundy/rust-student-pairs
[INFO] finished tweaking git repo https://github.com/droundy/rust-student-pairs
[INFO] tweaked toml for git repo https://github.com/droundy/rust-student-pairs written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/droundy/rust-student-pairs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b0ff7cf01bb9dca0cfcbdf667b6a9dcc3cfd73ff13cf7c5efe05a367006378c9
[INFO] running `"docker" "start" "-a" "b0ff7cf01bb9dca0cfcbdf667b6a9dcc3cfd73ff13cf7c5efe05a367006378c9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling askama_escape v0.2.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling filetime v0.2.8
[INFO] [stderr]    Compiling serde_yaml v0.8.11
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling gzip-header v0.3.0
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling thread_local v0.3.3
[INFO] [stderr]    Compiling brotli2 v0.3.2
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling tiny_http v0.6.2
[INFO] [stderr]    Compiling tinyset v0.4.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]    Compiling internment v0.3.12
[INFO] [stderr]    Compiling multipart v0.15.4
[INFO] [stderr]    Compiling askama_shared v0.8.0
[INFO] [stderr]    Compiling rouille v3.0.0
[INFO] [stderr]    Compiling askama_derive v0.8.0
[INFO] [stderr]    Compiling askama v0.8.0
[INFO] [stderr]    Compiling rust-student-pairs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |                   match post_input!(request, {
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 94 | |                     id: usize,
[INFO] [stderr] 95 | |                     name: String,
[INFO] [stderr] 96 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |                   match post_input!(request, {
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 94 | |                     id: usize,
[INFO] [stderr] 95 | |                     name: String,
[INFO] [stderr] 96 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:23
[INFO] [stderr]     |
[INFO] [stderr] 137 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 138 | |                     team: String,
[INFO] [stderr] 139 | |                     section: String,
[INFO] [stderr] 140 | |                     student: String,
[INFO] [stderr] 141 | |                     action: String,
[INFO] [stderr] 142 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:23
[INFO] [stderr]     |
[INFO] [stderr] 137 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 138 | |                     team: String,
[INFO] [stderr] 139 | |                     section: String,
[INFO] [stderr] 140 | |                     student: String,
[INFO] [stderr] 141 | |                     action: String,
[INFO] [stderr] 142 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 224 | |                     team: String,
[INFO] [stderr] 225 | |                     section: String,
[INFO] [stderr] 226 | |                     primary: String,
[INFO] [stderr] 227 | |                     secondary: String,
[INFO] [stderr] 228 | |                     action: String,
[INFO] [stderr] 229 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 224 | |                     team: String,
[INFO] [stderr] 225 | |                     section: String,
[INFO] [stderr] 226 | |                     primary: String,
[INFO] [stderr] 227 | |                     secondary: String,
[INFO] [stderr] 228 | |                     action: String,
[INFO] [stderr] 229 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:291:23
[INFO] [stderr]     |
[INFO] [stderr] 291 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 292 | |                     section: String,
[INFO] [stderr] 293 | |                     oldname: String,
[INFO] [stderr] 294 | |                     newname: String,
[INFO] [stderr] 295 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:291:23
[INFO] [stderr]     |
[INFO] [stderr] 291 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 292 | |                     section: String,
[INFO] [stderr] 293 | |                     oldname: String,
[INFO] [stderr] 294 | |                     newname: String,
[INFO] [stderr] 295 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:327:23
[INFO] [stderr]     |
[INFO] [stderr] 327 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 328 | |                     oldname: String,
[INFO] [stderr] 329 | |                     newname: String,
[INFO] [stderr] 330 | |                     newzoom: String,
[INFO] [stderr] 331 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:327:23
[INFO] [stderr]     |
[INFO] [stderr] 327 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 328 | |                     oldname: String,
[INFO] [stderr] 329 | |                     newname: String,
[INFO] [stderr] 330 | |                     newzoom: String,
[INFO] [stderr] 331 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:364:23
[INFO] [stderr]     |
[INFO] [stderr] 364 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 365 | |                     oldname: String,
[INFO] [stderr] 366 | |                     newname: String,
[INFO] [stderr] 367 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:364:23
[INFO] [stderr]     |
[INFO] [stderr] 364 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 365 | |                     oldname: String,
[INFO] [stderr] 366 | |                     newname: String,
[INFO] [stderr] 367 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:306:13
[INFO] [stderr]     |
[INFO] [stderr] 306 |         let mut students: Vec<_> = self.student_sections.keys().cloned()
[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: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 25s
[INFO] running `"docker" "inspect" "b0ff7cf01bb9dca0cfcbdf667b6a9dcc3cfd73ff13cf7c5efe05a367006378c9"`
[INFO] running `"docker" "rm" "-f" "b0ff7cf01bb9dca0cfcbdf667b6a9dcc3cfd73ff13cf7c5efe05a367006378c9"`
[INFO] [stdout] b0ff7cf01bb9dca0cfcbdf667b6a9dcc3cfd73ff13cf7c5efe05a367006378c9
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2ef5d03eaf0370f9eb32c484977c74e1fb3199aac32c59ae50e0822fd4eb69d4
[INFO] running `"docker" "start" "-a" "2ef5d03eaf0370f9eb32c484977c74e1fb3199aac32c59ae50e0822fd4eb69d4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-student-pairs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |                   match post_input!(request, {
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 94 | |                     id: usize,
[INFO] [stderr] 95 | |                     name: String,
[INFO] [stderr] 96 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |                   match post_input!(request, {
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 94 | |                     id: usize,
[INFO] [stderr] 95 | |                     name: String,
[INFO] [stderr] 96 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:23
[INFO] [stderr]     |
[INFO] [stderr] 137 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 138 | |                     team: String,
[INFO] [stderr] 139 | |                     section: String,
[INFO] [stderr] 140 | |                     student: String,
[INFO] [stderr] 141 | |                     action: String,
[INFO] [stderr] 142 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:23
[INFO] [stderr]     |
[INFO] [stderr] 137 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 138 | |                     team: String,
[INFO] [stderr] 139 | |                     section: String,
[INFO] [stderr] 140 | |                     student: String,
[INFO] [stderr] 141 | |                     action: String,
[INFO] [stderr] 142 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 224 | |                     team: String,
[INFO] [stderr] 225 | |                     section: String,
[INFO] [stderr] 226 | |                     primary: String,
[INFO] [stderr] 227 | |                     secondary: String,
[INFO] [stderr] 228 | |                     action: String,
[INFO] [stderr] 229 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 224 | |                     team: String,
[INFO] [stderr] 225 | |                     section: String,
[INFO] [stderr] 226 | |                     primary: String,
[INFO] [stderr] 227 | |                     secondary: String,
[INFO] [stderr] 228 | |                     action: String,
[INFO] [stderr] 229 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:291:23
[INFO] [stderr]     |
[INFO] [stderr] 291 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 292 | |                     section: String,
[INFO] [stderr] 293 | |                     oldname: String,
[INFO] [stderr] 294 | |                     newname: String,
[INFO] [stderr] 295 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:291:23
[INFO] [stderr]     |
[INFO] [stderr] 291 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 292 | |                     section: String,
[INFO] [stderr] 293 | |                     oldname: String,
[INFO] [stderr] 294 | |                     newname: String,
[INFO] [stderr] 295 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:327:23
[INFO] [stderr]     |
[INFO] [stderr] 327 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 328 | |                     oldname: String,
[INFO] [stderr] 329 | |                     newname: String,
[INFO] [stderr] 330 | |                     newzoom: String,
[INFO] [stderr] 331 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:327:23
[INFO] [stderr]     |
[INFO] [stderr] 327 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 328 | |                     oldname: String,
[INFO] [stderr] 329 | |                     newname: String,
[INFO] [stderr] 330 | |                     newzoom: String,
[INFO] [stderr] 331 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:364:23
[INFO] [stderr]     |
[INFO] [stderr] 364 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 365 | |                     oldname: String,
[INFO] [stderr] 366 | |                     newname: String,
[INFO] [stderr] 367 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:364:23
[INFO] [stderr]     |
[INFO] [stderr] 364 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 365 | |                     oldname: String,
[INFO] [stderr] 366 | |                     newname: String,
[INFO] [stderr] 367 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:306:13
[INFO] [stderr]     |
[INFO] [stderr] 306 |         let mut students: Vec<_> = self.student_sections.keys().cloned()
[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: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.91s
[INFO] running `"docker" "inspect" "2ef5d03eaf0370f9eb32c484977c74e1fb3199aac32c59ae50e0822fd4eb69d4"`
[INFO] running `"docker" "rm" "-f" "2ef5d03eaf0370f9eb32c484977c74e1fb3199aac32c59ae50e0822fd4eb69d4"`
[INFO] [stdout] 2ef5d03eaf0370f9eb32c484977c74e1fb3199aac32c59ae50e0822fd4eb69d4
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1f506199544a16483cf28aac1ade34ef2b4635c1d7c36ba12c4c26b04e81aaa7
[INFO] running `"docker" "start" "-a" "1f506199544a16483cf28aac1ade34ef2b4635c1d7c36ba12c4c26b04e81aaa7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |                   match post_input!(request, {
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 94 | |                     id: usize,
[INFO] [stderr] 95 | |                     name: String,
[INFO] [stderr] 96 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |                   match post_input!(request, {
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 94 | |                     id: usize,
[INFO] [stderr] 95 | |                     name: String,
[INFO] [stderr] 96 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:23
[INFO] [stderr]     |
[INFO] [stderr] 137 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 138 | |                     team: String,
[INFO] [stderr] 139 | |                     section: String,
[INFO] [stderr] 140 | |                     student: String,
[INFO] [stderr] 141 | |                     action: String,
[INFO] [stderr] 142 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:23
[INFO] [stderr]     |
[INFO] [stderr] 137 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 138 | |                     team: String,
[INFO] [stderr] 139 | |                     section: String,
[INFO] [stderr] 140 | |                     student: String,
[INFO] [stderr] 141 | |                     action: String,
[INFO] [stderr] 142 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 224 | |                     team: String,
[INFO] [stderr] 225 | |                     section: String,
[INFO] [stderr] 226 | |                     primary: String,
[INFO] [stderr] 227 | |                     secondary: String,
[INFO] [stderr] 228 | |                     action: String,
[INFO] [stderr] 229 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 224 | |                     team: String,
[INFO] [stderr] 225 | |                     section: String,
[INFO] [stderr] 226 | |                     primary: String,
[INFO] [stderr] 227 | |                     secondary: String,
[INFO] [stderr] 228 | |                     action: String,
[INFO] [stderr] 229 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:291:23
[INFO] [stderr]     |
[INFO] [stderr] 291 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 292 | |                     section: String,
[INFO] [stderr] 293 | |                     oldname: String,
[INFO] [stderr] 294 | |                     newname: String,
[INFO] [stderr] 295 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:291:23
[INFO] [stderr]     |
[INFO] [stderr] 291 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 292 | |                     section: String,
[INFO] [stderr] 293 | |                     oldname: String,
[INFO] [stderr] 294 | |                     newname: String,
[INFO] [stderr] 295 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:327:23
[INFO] [stderr]     |
[INFO] [stderr] 327 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 328 | |                     oldname: String,
[INFO] [stderr] 329 | |                     newname: String,
[INFO] [stderr] 330 | |                     newzoom: String,
[INFO] [stderr] 331 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:327:23
[INFO] [stderr]     |
[INFO] [stderr] 327 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 328 | |                     oldname: String,
[INFO] [stderr] 329 | |                     newname: String,
[INFO] [stderr] 330 | |                     newzoom: String,
[INFO] [stderr] 331 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:364:23
[INFO] [stderr]     |
[INFO] [stderr] 364 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 365 | |                     oldname: String,
[INFO] [stderr] 366 | |                     newname: String,
[INFO] [stderr] 367 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:364:23
[INFO] [stderr]     |
[INFO] [stderr] 364 |                   match post_input!(request, {
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 365 | |                     oldname: String,
[INFO] [stderr] 366 | |                     newname: String,
[INFO] [stderr] 367 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:306:13
[INFO] [stderr]     |
[INFO] [stderr] 306 |         let mut students: Vec<_> = self.student_sections.keys().cloned()
[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: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_student_pairs-730da3c769cad4a3
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test database::test_split_evenly ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1f506199544a16483cf28aac1ade34ef2b4635c1d7c36ba12c4c26b04e81aaa7"`
[INFO] running `"docker" "rm" "-f" "1f506199544a16483cf28aac1ade34ef2b4635c1d7c36ba12c4c26b04e81aaa7"`
[INFO] [stdout] 1f506199544a16483cf28aac1ade34ef2b4635c1d7c36ba12c4c26b04e81aaa7