[INFO] fetching crate math-engine 0.2.0...
[INFO] checking math-engine-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate math-engine 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate math-engine 0.2.0
[INFO] finished tweaking crates.io crate math-engine 0.2.0
[INFO] tweaked toml for crates.io crate math-engine 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate math-engine 0.2.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate math-engine 0.2.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60591b53e0ecb743df03ebc80174fbdbd57ae3e3353533d8ecd54415100123cd
[INFO] running `Command { std: "docker" "start" "-a" "60591b53e0ecb743df03ebc80174fbdbd57ae3e3353533d8ecd54415100123cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60591b53e0ecb743df03ebc80174fbdbd57ae3e3353533d8ecd54415100123cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60591b53e0ecb743df03ebc80174fbdbd57ae3e3353533d8ecd54415100123cd", kill_on_drop: false }`
[INFO] [stdout] 60591b53e0ecb743df03ebc80174fbdbd57ae3e3353533d8ecd54415100123cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90adddd256da15b0a7124d468ab7bec7795d89649ba0e269f98d19496266b17a
[INFO] running `Command { std: "docker" "start" "-a" "90adddd256da15b0a7124d468ab7bec7795d89649ba0e269f98d19496266b17a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking lexgen_util v0.14.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling pomelo-impl v0.1.5
[INFO] [stderr]    Compiling lexgen v0.14.0
[INFO] [stderr]     Checking pomelo v0.1.5
[INFO] [stderr]     Checking math-engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<Token, Infallible>
[INFO] [stdout]   --> src/parser.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | / lexer! {
[INFO] [stdout] 34 | |     ExprLexer -> Token;
[INFO] [stdout] 35 | |
[INFO] [stdout] 36 | |     let number = ['0'-'9']+ '.' ['0'-'9']*;
[INFO] [stdout] ...  |
[INFO] [stdout] 54 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `lexer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Token, Infallible>
[INFO] [stdout]   --> src/parser.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | / lexer! {
[INFO] [stdout] 34 | |     ExprLexer -> Token;
[INFO] [stdout] 35 | |
[INFO] [stdout] 36 | |     let number = ['0'-'9']+ '.' ['0'-'9']*;
[INFO] [stdout] ...  |
[INFO] [stdout] 54 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `lexer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `math-engine` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `math-engine` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "90adddd256da15b0a7124d468ab7bec7795d89649ba0e269f98d19496266b17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90adddd256da15b0a7124d468ab7bec7795d89649ba0e269f98d19496266b17a", kill_on_drop: false }`
[INFO] [stdout] 90adddd256da15b0a7124d468ab7bec7795d89649ba0e269f98d19496266b17a
