[INFO] fetching crate boltdb 0.0.1...
[INFO] testing boltdb-0.0.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate boltdb 0.0.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate boltdb 0.0.1
[INFO] finished tweaking crates.io crate boltdb 0.0.1
[INFO] tweaked toml for crates.io crate boltdb 0.0.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate boltdb 0.0.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate boltdb 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc07fbdd66f99f9c471e297861b4bc07fbc425d6451c874733aed256b39a6a4b
[INFO] running `Command { std: "docker" "start" "-a" "cc07fbdd66f99f9c471e297861b4bc07fbc425d6451c874733aed256b39a6a4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc07fbdd66f99f9c471e297861b4bc07fbc425d6451c874733aed256b39a6a4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc07fbdd66f99f9c471e297861b4bc07fbc425d6451c874733aed256b39a6a4b", kill_on_drop: false }`
[INFO] [stdout] cc07fbdd66f99f9c471e297861b4bc07fbc425d6451c874733aed256b39a6a4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6d262017ddde84a99212695d1d59176b430abdb080479bee5b62ecbd9248162
[INFO] running `Command { std: "docker" "start" "-a" "e6d262017ddde84a99212695d1d59176b430abdb080479bee5b62ecbd9248162", kill_on_drop: false }`
[INFO] [stderr]    Compiling boltdb v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "e6d262017ddde84a99212695d1d59176b430abdb080479bee5b62ecbd9248162", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6d262017ddde84a99212695d1d59176b430abdb080479bee5b62ecbd9248162", kill_on_drop: false }`
[INFO] [stdout] e6d262017ddde84a99212695d1d59176b430abdb080479bee5b62ecbd9248162
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06501f3f3014b514e1d31812f88c0a5a7036715ebb9012b32f608082072af449
[INFO] running `Command { std: "docker" "start" "-a" "06501f3f3014b514e1d31812f88c0a5a7036715ebb9012b32f608082072af449", kill_on_drop: false }`
[INFO] [stderr]    Compiling boltdb v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `rust_write` is never used
[INFO] [stdout]  --> examples/cross-lang/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn rust_write() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rust_read` is never used
[INFO] [stdout]  --> examples/cross-lang/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn rust_read() {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `boltdb` (example "echo") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0601]: `main` function not found in crate `echo`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `examples/echo.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "06501f3f3014b514e1d31812f88c0a5a7036715ebb9012b32f608082072af449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06501f3f3014b514e1d31812f88c0a5a7036715ebb9012b32f608082072af449", kill_on_drop: false }`
[INFO] [stdout] 06501f3f3014b514e1d31812f88c0a5a7036715ebb9012b32f608082072af449