[INFO] fetching crate monero-burn 0.4.2...
[INFO] checking monero-burn-0.4.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate monero-burn 0.4.2 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate monero-burn 0.4.2
[INFO] finished tweaking crates.io crate monero-burn 0.4.2
[INFO] tweaked toml for crates.io crate monero-burn 0.4.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate monero-burn 0.4.2 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 monero-burn 0.4.2 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 92bea8c7d8af663354e6eeb98a9d69f5a603153b4f61fbafcee155562f5ade5f
[INFO] running `Command { std: "docker" "start" "-a" "92bea8c7d8af663354e6eeb98a9d69f5a603153b4f61fbafcee155562f5ade5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92bea8c7d8af663354e6eeb98a9d69f5a603153b4f61fbafcee155562f5ade5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92bea8c7d8af663354e6eeb98a9d69f5a603153b4f61fbafcee155562f5ade5f", kill_on_drop: false }`
[INFO] [stdout] 92bea8c7d8af663354e6eeb98a9d69f5a603153b4f61fbafcee155562f5ade5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] fba2d4987ef5ce26c21a1cbdfd1762e1928e03eb38dc8716bdae6c795aacf546
[INFO] running `Command { std: "docker" "start" "-a" "fba2d4987ef5ce26c21a1cbdfd1762e1928e03eb38dc8716bdae6c795aacf546", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking static_assertions v0.2.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking subtle v2.2.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking uint v0.4.1
[INFO] [stderr]     Checking uint v0.8.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking fixed-hash v0.2.5
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking fixed-hash v0.4.0
[INFO] [stderr]     Checking fixed-hash v0.3.2
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling structopt-derive v0.4.5
[INFO] [stderr]     Checking structopt v0.3.12
[INFO] [stderr]     Checking ethereum-types-serialize v0.2.2
[INFO] [stderr]     Checking parity-scale-codec v1.3.0
[INFO] [stderr]     Checking curve25519-dalek v2.0.0
[INFO] [stderr]     Checking ethbloom v0.5.3
[INFO] [stderr]     Checking ethereum-types v0.4.2
[INFO] [stderr]     Checking keccak-hash v0.1.2
[INFO] [stderr]     Checking base58-monero v0.1.1
[INFO] [stderr]     Checking impl-codec v0.4.2
[INFO] [stderr]     Checking primitive-types v0.5.1
[INFO] [stderr]     Checking keccak-hash v0.3.0
[INFO] [stderr]     Checking monero v0.7.0
[INFO] [stderr]     Checking monero-burn v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     tag: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     tag: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `monero-burn` (bin "monero-burn" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `monero-burn` (bin "monero-burn") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "fba2d4987ef5ce26c21a1cbdfd1762e1928e03eb38dc8716bdae6c795aacf546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fba2d4987ef5ce26c21a1cbdfd1762e1928e03eb38dc8716bdae6c795aacf546", kill_on_drop: false }`
[INFO] [stdout] fba2d4987ef5ce26c21a1cbdfd1762e1928e03eb38dc8716bdae6c795aacf546
