[INFO] fetching crate vartyint 0.3.0...
[INFO] checking vartyint-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate vartyint 0.3.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate vartyint 0.3.0
[INFO] finished tweaking crates.io crate vartyint 0.3.0
[INFO] tweaked toml for crates.io crate vartyint 0.3.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate vartyint 0.3.0 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] 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] 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a67b1d2c24418e9a4220c658515d7d26d85f245fa2603e08299ef6e104a28dbf
[INFO] running `Command { std: "docker" "start" "-a" "a67b1d2c24418e9a4220c658515d7d26d85f245fa2603e08299ef6e104a28dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a67b1d2c24418e9a4220c658515d7d26d85f245fa2603e08299ef6e104a28dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a67b1d2c24418e9a4220c658515d7d26d85f245fa2603e08299ef6e104a28dbf", kill_on_drop: false }`
[INFO] [stdout] a67b1d2c24418e9a4220c658515d7d26d85f245fa2603e08299ef6e104a28dbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] c507665f2d053e615d6a3792e91839d71325ad281180a5f3fca22d72495d72eb
[INFO] running `Command { std: "docker" "start" "-a" "c507665f2d053e615d6a3792e91839d71325ad281180a5f3fca22d72495d72eb", kill_on_drop: false }`
[INFO] [stderr]     Checking vartyint v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `ReadVarInt` is never used
[INFO] [stdout]    --> src/lib.rs:244:7
[INFO] [stdout]     |
[INFO] [stdout] 244 | trait ReadVarInt {
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]    --> src/lib.rs:172:19
[INFO] [stdout]     |
[INFO] [stdout] 172 |             match val.try_into() {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 184 | read_signed!(read_i128, i128, 128);
[INFO] [stdout]     | ---------------------------------- in this macro invocation
[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 `read_signed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vartyint` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: trait `ReadVarInt` is never used
[INFO] [stdout]    --> src/lib.rs:244:7
[INFO] [stdout]     |
[INFO] [stdout] 244 | trait ReadVarInt {
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]    --> src/lib.rs:172:19
[INFO] [stdout]     |
[INFO] [stdout] 172 |             match val.try_into() {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 184 | read_signed!(read_i128, i128, 128);
[INFO] [stdout]     | ---------------------------------- in this macro invocation
[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 `read_signed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vartyint` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "c507665f2d053e615d6a3792e91839d71325ad281180a5f3fca22d72495d72eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c507665f2d053e615d6a3792e91839d71325ad281180a5f3fca22d72495d72eb", kill_on_drop: false }`
[INFO] [stdout] c507665f2d053e615d6a3792e91839d71325ad281180a5f3fca22d72495d72eb