[INFO] fetching crate customasm 0.13.12...
[INFO] checking customasm-0.13.12 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate customasm 0.13.12 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate customasm 0.13.12
[INFO] finished tweaking crates.io crate customasm 0.13.12
[INFO] tweaked toml for crates.io crate customasm 0.13.12 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate customasm 0.13.12 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 customasm 0.13.12 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6ad37720b21ee75e0a12c9e99afaa1fb8619ae8ebf313b076e65f57f59b36469
[INFO] running `Command { std: "docker" "start" "-a" "6ad37720b21ee75e0a12c9e99afaa1fb8619ae8ebf313b076e65f57f59b36469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ad37720b21ee75e0a12c9e99afaa1fb8619ae8ebf313b076e65f57f59b36469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ad37720b21ee75e0a12c9e99afaa1fb8619ae8ebf313b076e65f57f59b36469", kill_on_drop: false }`
[INFO] [stdout] 6ad37720b21ee75e0a12c9e99afaa1fb8619ae8ebf313b076e65f57f59b36469
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 176d96467bd8d348daf87447bc99f9ee2892c92856e6aceebc4cb21d4297fa8a
[INFO] running `Command { std: "docker" "start" "-a" "176d96467bd8d348daf87447bc99f9ee2892c92856e6aceebc4cb21d4297fa8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling customasm v0.13.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking unicode-width v0.2.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking getopts v0.2.23
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/util/char_counter.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 |             line_begin.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<usize, Infallible>
[INFO] [stdout]   --> src/util/char_counter.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 |             line_end.try_into().unwrap()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/util/fileserver.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |             .or_insert(next_index.try_into().unwrap());
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/util/fileserver.rs:222:15
[INFO] [stdout]     |
[INFO] [stdout] 222 |             .or_insert(next_index.try_into().unwrap());
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/util/fileserver.rs:310:15
[INFO] [stdout]     |
[INFO] [stdout] 310 |             .or_insert(new_index.try_into().unwrap());
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `customasm` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/util/char_counter.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 |             line_begin.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<usize, Infallible>
[INFO] [stdout]   --> src/util/char_counter.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 |             line_end.try_into().unwrap()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/util/fileserver.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |             .or_insert(next_index.try_into().unwrap());
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/util/fileserver.rs:222:15
[INFO] [stdout]     |
[INFO] [stdout] 222 |             .or_insert(next_index.try_into().unwrap());
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/util/fileserver.rs:310:15
[INFO] [stdout]     |
[INFO] [stdout] 310 |             .or_insert(new_index.try_into().unwrap());
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `customasm` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "176d96467bd8d348daf87447bc99f9ee2892c92856e6aceebc4cb21d4297fa8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "176d96467bd8d348daf87447bc99f9ee2892c92856e6aceebc4cb21d4297fa8a", kill_on_drop: false }`
[INFO] [stdout] 176d96467bd8d348daf87447bc99f9ee2892c92856e6aceebc4cb21d4297fa8a