[INFO] fetching crate assert_let 0.1.0...
[INFO] testing assert_let-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate assert_let 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate assert_let 0.1.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate assert_let 0.1.0
[INFO] finished tweaking crates.io crate assert_let 0.1.0
[INFO] tweaked toml for crates.io crate assert_let 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01c03e0c7b743b55ae7715785556e4cfa7300efc881c0c405f52e3afbf7fdc8a
[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" "01c03e0c7b743b55ae7715785556e4cfa7300efc881c0c405f52e3afbf7fdc8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01c03e0c7b743b55ae7715785556e4cfa7300efc881c0c405f52e3afbf7fdc8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01c03e0c7b743b55ae7715785556e4cfa7300efc881c0c405f52e3afbf7fdc8a", kill_on_drop: false }`
[INFO] [stdout] 01c03e0c7b743b55ae7715785556e4cfa7300efc881c0c405f52e3afbf7fdc8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--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] d08cb108e928de41db5dcb9da8cd573e6f81b203c0412f9db448976338389863
[INFO] running `Command { std: "docker" "start" "-a" "d08cb108e928de41db5dcb9da8cd573e6f81b203c0412f9db448976338389863", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling assert_let v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.93s
[INFO] running `Command { std: "docker" "inspect" "d08cb108e928de41db5dcb9da8cd573e6f81b203c0412f9db448976338389863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d08cb108e928de41db5dcb9da8cd573e6f81b203c0412f9db448976338389863", kill_on_drop: false }`
[INFO] [stdout] d08cb108e928de41db5dcb9da8cd573e6f81b203c0412f9db448976338389863
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--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] 09642d1fb5fc7b630b01c9bc1445e7057d766144717f8d3d673012297d0a3b7c
[INFO] running `Command { std: "docker" "start" "-a" "09642d1fb5fc7b630b01c9bc1445e7057d766144717f8d3d673012297d0a3b7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling assert_let v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "09642d1fb5fc7b630b01c9bc1445e7057d766144717f8d3d673012297d0a3b7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09642d1fb5fc7b630b01c9bc1445e7057d766144717f8d3d673012297d0a3b7c", kill_on_drop: false }`
[INFO] [stdout] 09642d1fb5fc7b630b01c9bc1445e7057d766144717f8d3d673012297d0a3b7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] ea3abe9a140fd3ffa86bfd40ac28b49417317f8c33fc9096cf32dfe086aac81a
[INFO] running `Command { std: "docker" "start" "-a" "ea3abe9a140fd3ffa86bfd40ac28b49417317f8c33fc9096cf32dfe086aac81a", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/assert_let-4b445bf1f393c8f9
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests assert_let
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "ea3abe9a140fd3ffa86bfd40ac28b49417317f8c33fc9096cf32dfe086aac81a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea3abe9a140fd3ffa86bfd40ac28b49417317f8c33fc9096cf32dfe086aac81a", kill_on_drop: false }`
[INFO] [stdout] ea3abe9a140fd3ffa86bfd40ac28b49417317f8c33fc9096cf32dfe086aac81a