[INFO] fetching crate fstrings 0.2.4-rc2...
[INFO] testing fstrings-0.2.4-rc2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate fstrings 0.2.4-rc2 into /workspace/builds/worker-30/source
[INFO] validating manifest of crates.io crate fstrings 0.2.4-rc2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fstrings 0.2.4-rc2
[INFO] finished tweaking crates.io crate fstrings 0.2.4-rc2
[INFO] tweaked toml for crates.io crate fstrings 0.2.4-rc2 written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate crates.io crate fstrings 0.2.4-rc2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fstrings-proc-macro v0.2.4-rc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] caa8c7aa41d6fdcbf3689b3fbed4732146ed51e0b24173bf5f4cf86fa5f7f7f1
[INFO] running `Command { std: "docker" "start" "-a" "caa8c7aa41d6fdcbf3689b3fbed4732146ed51e0b24173bf5f4cf86fa5f7f7f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "caa8c7aa41d6fdcbf3689b3fbed4732146ed51e0b24173bf5f4cf86fa5f7f7f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caa8c7aa41d6fdcbf3689b3fbed4732146ed51e0b24173bf5f4cf86fa5f7f7f1", kill_on_drop: false }`
[INFO] [stdout] caa8c7aa41d6fdcbf3689b3fbed4732146ed51e0b24173bf5f4cf86fa5f7f7f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebd7aedde839f9199a22068d89de9f99b592ba1376336b616eb7e0b16365915f
[INFO] running `Command { std: "docker" "start" "-a" "ebd7aedde839f9199a22068d89de9f99b592ba1376336b616eb7e0b16365915f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling fstrings-proc-macro v0.2.4-rc2
[INFO] [stderr]    Compiling fstrings v0.2.4-rc2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.23s
[INFO] running `Command { std: "docker" "inspect" "ebd7aedde839f9199a22068d89de9f99b592ba1376336b616eb7e0b16365915f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebd7aedde839f9199a22068d89de9f99b592ba1376336b616eb7e0b16365915f", kill_on_drop: false }`
[INFO] [stdout] ebd7aedde839f9199a22068d89de9f99b592ba1376336b616eb7e0b16365915f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f04a63484926b3492221ceeb9ab64a02ffb7061c0494f05912e5e5968018b17
[INFO] running `Command { std: "docker" "start" "-a" "2f04a63484926b3492221ceeb9ab64a02ffb7061c0494f05912e5e5968018b17", kill_on_drop: false }`
[INFO] [stderr]    Compiling fstrings v0.2.4-rc2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "2f04a63484926b3492221ceeb9ab64a02ffb7061c0494f05912e5e5968018b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f04a63484926b3492221ceeb9ab64a02ffb7061c0494f05912e5e5968018b17", kill_on_drop: false }`
[INFO] [stdout] 2f04a63484926b3492221ceeb9ab64a02ffb7061c0494f05912e5e5968018b17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2b10e49f7bf1d9b2bc8c94304cab7c9a2c39dc4c2eb30532f982431c9f5ba89b
[INFO] running `Command { std: "docker" "start" "-a" "2b10e49f7bf1d9b2bc8c94304cab7c9a2c39dc4c2eb30532f982431c9f5ba89b", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/fstrings-f1a06929f1fb7e14)
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests fstrings
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - doctest_readme (line 48) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.52s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2b10e49f7bf1d9b2bc8c94304cab7c9a2c39dc4c2eb30532f982431c9f5ba89b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b10e49f7bf1d9b2bc8c94304cab7c9a2c39dc4c2eb30532f982431c9f5ba89b", kill_on_drop: false }`
[INFO] [stdout] 2b10e49f7bf1d9b2bc8c94304cab7c9a2c39dc4c2eb30532f982431c9f5ba89b