[INFO] fetching crate asciimath-parser 0.1.1...
[INFO] checking asciimath-parser-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate asciimath-parser 0.1.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate asciimath-parser 0.1.1
[INFO] finished tweaking crates.io crate asciimath-parser 0.1.1
[INFO] tweaked toml for crates.io crate asciimath-parser 0.1.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate asciimath-parser 0.1.1 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 29 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] [stderr]       Adding rand_distr v0.4.3 (available: v0.5.1)
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ec74bf0280bb082091881c2ca81ffc90a32b2741c0f5a06e2ff9c19c42228dce
[INFO] running `Command { std: "docker" "start" "-a" "ec74bf0280bb082091881c2ca81ffc90a32b2741c0f5a06e2ff9c19c42228dce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec74bf0280bb082091881c2ca81ffc90a32b2741c0f5a06e2ff9c19c42228dce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec74bf0280bb082091881c2ca81ffc90a32b2741c0f5a06e2ff9c19c42228dce", kill_on_drop: false }`
[INFO] [stdout] ec74bf0280bb082091881c2ca81ffc90a32b2741c0f5a06e2ff9c19c42228dce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] db14683fcb75f1492fac6a0d54a4d21ac45bf73fe6af2be5b91a6f134952eabd
[INFO] running `Command { std: "docker" "start" "-a" "db14683fcb75f1492fac6a0d54a4d21ac45bf73fe6af2be5b91a6f134952eabd", kill_on_drop: false }`
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking charred v0.3.6
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking htmlescape v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking qp-trie v0.8.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking asciimath-rs v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking asciimath-parser v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> benches/examples.rs:18:27
[INFO] [stdout]    |
[INFO] [stdout] 18 |             1 => res.push(rng.sample(Alphanumeric).try_into().unwrap()),
[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 `asciimath-parser` (bench "prefix_map") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> benches/examples.rs:18:27
[INFO] [stdout]    |
[INFO] [stdout] 18 |             1 => res.push(rng.sample(Alphanumeric).try_into().unwrap()),
[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<char, Infallible>
[INFO] [stdout]   --> tests/prefix_map.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |             1 => res.push(rng.sample(Alphanumeric).try_into().unwrap()),
[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 `asciimath-parser` (bench "comparison") due to 1 previous error
[INFO] [stderr] error: could not compile `asciimath-parser` (test "prefix_map") due to 1 previous error
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> benches/examples.rs:18:27
[INFO] [stdout]    |
[INFO] [stdout] 18 |             1 => res.push(rng.sample(Alphanumeric).try_into().unwrap()),
[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 `asciimath-parser` (bench "examples") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "db14683fcb75f1492fac6a0d54a4d21ac45bf73fe6af2be5b91a6f134952eabd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db14683fcb75f1492fac6a0d54a4d21ac45bf73fe6af2be5b91a6f134952eabd", kill_on_drop: false }`
[INFO] [stdout] db14683fcb75f1492fac6a0d54a4d21ac45bf73fe6af2be5b91a6f134952eabd