[INFO] cloning repository https://github.com/Tokeiya/real_number_survey
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tokeiya/real_number_survey" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTokeiya%2Freal_number_survey", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTokeiya%2Freal_number_survey'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8bde855e7a1b72ec6d54d40387b9390dd78bc31c
[INFO] checking Tokeiya/real_number_survey against master#be181dd75c83d72fcc95538e235768bc367b76b9 for pr-140208
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTokeiya%2Freal_number_survey" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tokeiya/real_number_survey on toolchain be181dd75c83d72fcc95538e235768bc367b76b9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+be181dd75c83d72fcc95538e235768bc367b76b9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tokeiya/real_number_survey
[INFO] finished tweaking git repo https://github.com/Tokeiya/real_number_survey
[INFO] tweaked toml for git repo https://github.com/Tokeiya/real_number_survey written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Tokeiya/real_number_survey 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" "+be181dd75c83d72fcc95538e235768bc367b76b9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+be181dd75c83d72fcc95538e235768bc367b76b9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01a4e13817216ffef39d7b1e90e2b632d86a66ef079a22bbaca1146f22835f51
[INFO] running `Command { std: "docker" "start" "-a" "01a4e13817216ffef39d7b1e90e2b632d86a66ef079a22bbaca1146f22835f51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01a4e13817216ffef39d7b1e90e2b632d86a66ef079a22bbaca1146f22835f51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01a4e13817216ffef39d7b1e90e2b632d86a66ef079a22bbaca1146f22835f51", kill_on_drop: false }`
[INFO] [stdout] 01a4e13817216ffef39d7b1e90e2b632d86a66ef079a22bbaca1146f22835f51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+be181dd75c83d72fcc95538e235768bc367b76b9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 900e9b703b12d8e842972b3a4c72a73bc5ed5a5597c24917074c6a22591187c4
[INFO] running `Command { std: "docker" "start" "-a" "900e9b703b12d8e842972b3a4c72a73bc5ed5a5597c24917074c6a22591187c4", kill_on_drop: false }`
[INFO] [stderr]     Checking anatomy v0.1.0 (/opt/rustwide/workdir/anatomy)
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> anatomy/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fmt`
[INFO] [stdout]   --> anatomy/src/dissector.rs:29:21
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn describe(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_fmt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BitArray` is never used
[INFO] [stdout]  --> anatomy/src/bit_array.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum BitArray<const N: usize>
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Mantissa` is never used
[INFO] [stdout]  --> anatomy/src/mantissa.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub trait Mantissa<const N: usize> {
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Dissector` is never used
[INFO] [stdout]  --> anatomy/src/dissector.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Dissector<const N: usize> {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> anatomy/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir/playground)
[INFO] [stdout] warning: unused variable: `fmt`
[INFO] [stdout]   --> anatomy/src/dissector.rs:29:21
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn describe(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_fmt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BitArray` is never used
[INFO] [stdout]  --> anatomy/src/bit_array.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum BitArray<const N: usize>
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Mantissa` is never used
[INFO] [stdout]  --> anatomy/src/mantissa.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub trait Mantissa<const N: usize> {
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Dissector` is never used
[INFO] [stdout]  --> anatomy/src/dissector.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Dissector<const N: usize> {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "900e9b703b12d8e842972b3a4c72a73bc5ed5a5597c24917074c6a22591187c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "900e9b703b12d8e842972b3a4c72a73bc5ed5a5597c24917074c6a22591187c4", kill_on_drop: false }`
[INFO] [stdout] 900e9b703b12d8e842972b3a4c72a73bc5ed5a5597c24917074c6a22591187c4