[INFO] updating cached repository https://github.com/ashishnegi/learndb
[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] 59642e60bca7e59446f936c1836f98a1805d108f
[INFO] checking ashishnegi/learndb against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishnegi%2Flearndb" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ashishnegi/learndb on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ashishnegi/learndb
[INFO] finished tweaking git repo https://github.com/ashishnegi/learndb
[INFO] tweaked toml for git repo https://github.com/ashishnegi/learndb written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/ashishnegi/learndb already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d2eb1ffbe95736cbd030bf7d0351a3d9b3e2d2e39e18f82e7bc83a85614c04dd
[INFO] running `"docker" "start" "-a" "d2eb1ffbe95736cbd030bf7d0351a3d9b3e2d2e39e18f82e7bc83a85614c04dd"`
[INFO] [stderr]     Checking downcast-rs v1.0.3
[INFO] [stderr]     Checking learndb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/sqliters/context.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 |     select_outfn: Box<OutFn>
[INFO] [stderr]   |                       ^^^^^ help: use `dyn`: `dyn OutFn`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sqliters/context.rs:30:34
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(select_outfn: Box<OutFn>) -> Self {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn OutFn`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `delete_db`
[INFO] [stderr]   --> src/sqliters/table.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn delete_db(&mut self) -> Result<(), String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `delete_db_file`
[INFO] [stderr]   --> src/sqliters/pager.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn delete_db_file(&mut self) -> Result<(), String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_root_node`
[INFO] [stderr]    --> src/sqliters/page.rs:397:4
[INFO] [stderr]     |
[INFO] [stderr] 397 | fn is_root_node(page: &Vec<u8>) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/sqliters/context.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 |     select_outfn: Box<OutFn>
[INFO] [stderr]   |                       ^^^^^ help: use `dyn`: `dyn OutFn`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sqliters/context.rs:30:34
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(select_outfn: Box<OutFn>) -> Self {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn OutFn`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sqliters/context.rs:41:35
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn get_out(&self) -> &Box<OutFn> {
[INFO] [stderr]    |                                   ^^^^^ help: use `dyn`: `dyn OutFn`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_root_node`
[INFO] [stderr]    --> src/sqliters/page.rs:397:4
[INFO] [stderr]     |
[INFO] [stderr] 397 | fn is_root_node(page: &Vec<u8>) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
[INFO] running `"docker" "inspect" "d2eb1ffbe95736cbd030bf7d0351a3d9b3e2d2e39e18f82e7bc83a85614c04dd"`
[INFO] running `"docker" "rm" "-f" "d2eb1ffbe95736cbd030bf7d0351a3d9b3e2d2e39e18f82e7bc83a85614c04dd"`
[INFO] [stdout] d2eb1ffbe95736cbd030bf7d0351a3d9b3e2d2e39e18f82e7bc83a85614c04dd