[INFO] fetching crate cpython 0.5.2...
[INFO] checking cpython-0.5.2 against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate cpython 0.5.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate cpython 0.5.2 on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cpython 0.5.2
[INFO] finished tweaking crates.io crate cpython 0.5.2
[INFO] tweaked toml for crates.io crate cpython 0.5.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate cpython 0.5.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cde6dedd14f66bcd39b2ea24c6a326ffbd76976f0f5e221de3ac29e925d650c
[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" "9cde6dedd14f66bcd39b2ea24c6a326ffbd76976f0f5e221de3ac29e925d650c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cde6dedd14f66bcd39b2ea24c6a326ffbd76976f0f5e221de3ac29e925d650c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cde6dedd14f66bcd39b2ea24c6a326ffbd76976f0f5e221de3ac29e925d650c", kill_on_drop: false }`
[INFO] [stdout] 9cde6dedd14f66bcd39b2ea24c6a326ffbd76976f0f5e221de3ac29e925d650c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba219a2ca9adf878a83d8d1f6a5bb9172f5b40a048ded58fcefea6eacbfc0fc1
[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" "ba219a2ca9adf878a83d8d1f6a5bb9172f5b40a048ded58fcefea6eacbfc0fc1", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]    Compiling cpython v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling paste-impl v0.1.17
[INFO] [stderr]     Checking paste v0.1.17
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling python3-sys v0.5.2
[INFO] [stdout] warning: function is never used: `test_thread_exit_py`
[INFO] [stdout]  --> tests/test_thread_exit.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn test_thread_exit_py(py: Python) -> PyResult<()> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `exit_thread`
[INFO] [stdout]   --> tests/test_thread_exit.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn exit_thread(py: Python) -> PyResult<String> {
[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 30.36s
[INFO] running `Command { std: "docker" "inspect" "ba219a2ca9adf878a83d8d1f6a5bb9172f5b40a048ded58fcefea6eacbfc0fc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba219a2ca9adf878a83d8d1f6a5bb9172f5b40a048ded58fcefea6eacbfc0fc1", kill_on_drop: false }`
[INFO] [stdout] ba219a2ca9adf878a83d8d1f6a5bb9172f5b40a048ded58fcefea6eacbfc0fc1