[INFO] cloning repository https://github.com/qultist/tasty-json
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qultist/tasty-json" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqultist%2Ftasty-json", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqultist%2Ftasty-json'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a66465a66f36313c5bc0968aee0da9b5155294e
[INFO] checking qultist/tasty-json against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqultist%2Ftasty-json" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qultist/tasty-json on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/qultist/tasty-json
[INFO] finished tweaking git repo https://github.com/qultist/tasty-json
[INFO] tweaked toml for git repo https://github.com/qultist/tasty-json written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/qultist/tasty-json already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] cb13baf41472d779c8a0772a76f8ffc4fd1b629c3cd3554225cfc7baaa815d9f
[INFO] running `Command { std: "docker" "start" "-a" "cb13baf41472d779c8a0772a76f8ffc4fd1b629c3cd3554225cfc7baaa815d9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb13baf41472d779c8a0772a76f8ffc4fd1b629c3cd3554225cfc7baaa815d9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb13baf41472d779c8a0772a76f8ffc4fd1b629c3cd3554225cfc7baaa815d9f", kill_on_drop: false }`
[INFO] [stdout] cb13baf41472d779c8a0772a76f8ffc4fd1b629c3cd3554225cfc7baaa815d9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] e54976ef7a5ae1929fb08c6078f0a4ade3d3e927574c5b26c3580675ad2e2ac7
[INFO] running `Command { std: "docker" "start" "-a" "e54976ef7a5ae1929fb08c6078f0a4ade3d3e927574c5b26c3580675ad2e2ac7", kill_on_drop: false }`
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking lazy_static v1.0.1
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking regex-syntax v0.6.1
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]     Checking tasty-json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_f64`
[INFO] [stdout]   --> src/json.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn as_f64(&self) -> Option<f64> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_vec`
[INFO] [stdout]   --> src/json.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn as_vec(&self) -> Option<Vec<Value>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_bool`
[INFO] [stdout]   --> src/json.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn as_bool(&self) -> Option<bool> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.71s
[INFO] running `Command { std: "docker" "inspect" "e54976ef7a5ae1929fb08c6078f0a4ade3d3e927574c5b26c3580675ad2e2ac7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e54976ef7a5ae1929fb08c6078f0a4ade3d3e927574c5b26c3580675ad2e2ac7", kill_on_drop: false }`
[INFO] [stdout] e54976ef7a5ae1929fb08c6078f0a4ade3d3e927574c5b26c3580675ad2e2ac7