[INFO] cloning repository https://github.com/jit-y/diff_json
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jit-y/diff_json" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjit-y%2Fdiff_json", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjit-y%2Fdiff_json'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 71764bdfc8d7f81964338b529e508948d93029d0
[INFO] testing jit-y/diff_json against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjit-y%2Fdiff_json" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jit-y/diff_json on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jit-y/diff_json
[INFO] finished tweaking git repo https://github.com/jit-y/diff_json
[INFO] tweaked toml for git repo https://github.com/jit-y/diff_json written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jit-y/diff_json already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78daa62b6864c1737e60bd98b71d909c455c8ffafb0b5303a99e314d59b35c70
[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" "78daa62b6864c1737e60bd98b71d909c455c8ffafb0b5303a99e314d59b35c70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78daa62b6864c1737e60bd98b71d909c455c8ffafb0b5303a99e314d59b35c70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78daa62b6864c1737e60bd98b71d909c455c8ffafb0b5303a99e314d59b35c70", kill_on_drop: false }`
[INFO] [stdout] 78daa62b6864c1737e60bd98b71d909c455c8ffafb0b5303a99e314d59b35c70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58ae04eed6b01cfc8d9e79ce613acecfcfb7bdc3ea4a133be9341c35fd6dbd63
[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" "58ae04eed6b01cfc8d9e79ce613acecfcfb7bdc3ea4a133be9341c35fd6dbd63", kill_on_drop: false }`
[INFO] [stderr]    Compiling itoa v0.3.4
[INFO] [stderr]    Compiling num-traits v0.1.41
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]    Compiling difference v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.9
[INFO] [stderr]    Compiling diff_json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `JSONPrettier`
[INFO] [stdout]  --> src/prettier.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct JSONPrettier {
[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: `to_pretty`
[INFO] [stdout]  --> src/prettier.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn to_pretty() {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.82s
[INFO] running `Command { std: "docker" "inspect" "58ae04eed6b01cfc8d9e79ce613acecfcfb7bdc3ea4a133be9341c35fd6dbd63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58ae04eed6b01cfc8d9e79ce613acecfcfb7bdc3ea4a133be9341c35fd6dbd63", kill_on_drop: false }`
[INFO] [stdout] 58ae04eed6b01cfc8d9e79ce613acecfcfb7bdc3ea4a133be9341c35fd6dbd63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e214bb0165a669b9ed975ce30360c6414ba8d9549927fb25131f21b617886f0
[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" "4e214bb0165a669b9ed975ce30360c6414ba8d9549927fb25131f21b617886f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling diff_json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `JSONPrettier`
[INFO] [stdout]  --> src/prettier.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct JSONPrettier {
[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: `to_pretty`
[INFO] [stdout]  --> src/prettier.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn to_pretty() {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `JSONPrettier`
[INFO] [stdout]  --> src/prettier.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct JSONPrettier {
[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: `to_pretty`
[INFO] [stdout]  --> src/prettier.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn to_pretty() {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "4e214bb0165a669b9ed975ce30360c6414ba8d9549927fb25131f21b617886f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e214bb0165a669b9ed975ce30360c6414ba8d9549927fb25131f21b617886f0", kill_on_drop: false }`
[INFO] [stdout] 4e214bb0165a669b9ed975ce30360c6414ba8d9549927fb25131f21b617886f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", 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] 1bb6051fde31c21f4c9cd1367f11ca8e5ffbcb3c5b355b0d0f9fca8e9ee4a5ef
[INFO] running `Command { std: "docker" "start" "-a" "1bb6051fde31c21f4c9cd1367f11ca8e5ffbcb3c5b355b0d0f9fca8e9ee4a5ef", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] warning: struct is never constructed: `JSONPrettier`
[INFO] [stderr]  --> src/prettier.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct JSONPrettier {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_pretty`
[INFO] [stderr]  --> src/prettier.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn to_pretty() {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `JSONPrettier`
[INFO] [stderr]  --> src/prettier.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct JSONPrettier {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_pretty`
[INFO] [stderr]  --> src/prettier.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn to_pretty() {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/diff_json-00dd11f26ebded7d
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/diff_json-a1469974d8d5802f
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests diff_json
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1bb6051fde31c21f4c9cd1367f11ca8e5ffbcb3c5b355b0d0f9fca8e9ee4a5ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bb6051fde31c21f4c9cd1367f11ca8e5ffbcb3c5b355b0d0f9fca8e9ee4a5ef", kill_on_drop: false }`
[INFO] [stdout] 1bb6051fde31c21f4c9cd1367f11ca8e5ffbcb3c5b355b0d0f9fca8e9ee4a5ef