[INFO] fetching crate root-io 0.3.0...
[INFO] checking root-io-0.3.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate root-io 0.3.0 into /workspace/builds/worker-37/source
[INFO] validating manifest of crates.io crate root-io 0.3.0 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 root-io 0.3.0
[INFO] finished tweaking crates.io crate root-io 0.3.0
[INFO] tweaked toml for crates.io crate root-io 0.3.0 written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
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[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.28
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[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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] 5f05bedf32be88deeaae766c95a3d74b8da90fc6bf0406e7284a5485f540c18a
[INFO] running `Command { std: "docker" "start" "-a" "5f05bedf32be88deeaae766c95a3d74b8da90fc6bf0406e7284a5485f540c18a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f05bedf32be88deeaae766c95a3d74b8da90fc6bf0406e7284a5485f540c18a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f05bedf32be88deeaae766c95a3d74b8da90fc6bf0406e7284a5485f540c18a", kill_on_drop: false }`
[INFO] [stdout] 5f05bedf32be88deeaae766c95a3d74b8da90fc6bf0406e7284a5485f540c18a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86e0d3f0862b188adcde7ded68e18c52948e023b5969cd4ba60cb388b8c2cdb5
[INFO] running `Command { std: "docker" "start" "-a" "86e0d3f0862b188adcde7ded68e18c52948e023b5969cd4ba60cb388b8c2cdb5", kill_on_drop: false }`
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[INFO] [stderr]    Compiling libc v0.2.103
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[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/tree_reader/branch.rs:130:38
[INFO] [stdout]     |
[INFO] [stdout] 130 |                     Err(e) => panic!(format!("Parser failed unexpectedly {:?}", e)),
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 130 |                     Err(e) => panic!("Parser failed unexpectedly {:?}", e),
[INFO] [stdout]     |                                     --                                  --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/tree_reader/branch.rs:158:46
[INFO] [stdout]     |
[INFO] [stdout] 158 | ...                   Err(e) => panic!(format!("Parser failed unexpectedly {:?}", e)),
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 158 |                             Err(e) => panic!("Parser failed unexpectedly {:?}", e),
[INFO] [stdout]     |                                             --                                  --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/tree_reader/branch.rs:130:38
[INFO] [stdout]     |
[INFO] [stdout] 130 |                     Err(e) => panic!(format!("Parser failed unexpectedly {:?}", e)),
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 130 |                     Err(e) => panic!("Parser failed unexpectedly {:?}", e),
[INFO] [stdout]     |                                     --                                  --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/tree_reader/branch.rs:158:46
[INFO] [stdout]     |
[INFO] [stdout] 158 | ...                   Err(e) => panic!(format!("Parser failed unexpectedly {:?}", e)),
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 158 |                             Err(e) => panic!("Parser failed unexpectedly {:?}", e),
[INFO] [stdout]     |                                             --                                  --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> benches/iter_branch.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let rt = Runtime::new().unwrap();
[INFO] [stdout]    |         -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 32 |     rt.block_on(fut);
[INFO] [stdout]    |     ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `rt` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> benches/iter_branch.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let rt = Runtime::new().unwrap();
[INFO] [stdout]    |         -- help: consider changing this to be mutable: `mut rt`
[INFO] [stdout] 59 |     rt.block_on(fut);
[INFO] [stdout]    |     ^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `root-io` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "86e0d3f0862b188adcde7ded68e18c52948e023b5969cd4ba60cb388b8c2cdb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86e0d3f0862b188adcde7ded68e18c52948e023b5969cd4ba60cb388b8c2cdb5", kill_on_drop: false }`
[INFO] [stdout] 86e0d3f0862b188adcde7ded68e18c52948e023b5969cd4ba60cb388b8c2cdb5
