[INFO] cloning repository https://github.com/yihozhang/egg-bench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yihozhang/egg-bench" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyihozhang%2Fegg-bench", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyihozhang%2Fegg-bench'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9da499a025300ed96982ff0c888372d84dc309be
[INFO] checking yihozhang/egg-bench against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyihozhang%2Fegg-bench" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yihozhang/egg-bench
[INFO] finished tweaking git repo https://github.com/yihozhang/egg-bench
[INFO] tweaked toml for git repo https://github.com/yihozhang/egg-bench written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yihozhang/egg-bench 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 git repo https://github.com/yihozhang/egg-bench 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 67a4d3268e214d5d8a50fad7b94b0d61e568b8f9e9709a53b29064caf7dd2f0f
[INFO] running `Command { std: "docker" "start" "-a" "67a4d3268e214d5d8a50fad7b94b0d61e568b8f9e9709a53b29064caf7dd2f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67a4d3268e214d5d8a50fad7b94b0d61e568b8f9e9709a53b29064caf7dd2f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67a4d3268e214d5d8a50fad7b94b0d61e568b8f9e9709a53b29064caf7dd2f0f", kill_on_drop: false }`
[INFO] [stdout] 67a4d3268e214d5d8a50fad7b94b0d61e568b8f9e9709a53b29064caf7dd2f0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] f0c0a5ca7fc8b51f22cc6697fcd839ec91daf79e56ffe660e16367d8adcf40f7
[INFO] running `Command { std: "docker" "start" "-a" "f0c0a5ca7fc8b51f22cc6697fcd839ec91daf79e56ffe660e16367d8adcf40f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking symbolic_expressions v5.0.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking qry v0.1.0 (https://github.com/mwillsey/qry?rev=11c92ff715d0593c0ca86c2b533b9ef8a249bd2c#11c92ff7)
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]     Checking regex v1.4.6
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking egg v0.6.1-dev (https://github.com/egraphs-good/egg?rev=2b89b7594c2e163d9eab9cb687be1edbd7e09563#2b89b759)
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking egg-bench v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:166:5
[INFO] [stdout]     |
[INFO] [stdout] 166 | /     #[structopt(short, long, value_delimiter = ",", default_value = "math,lambda")]
[INFO] [stdout] 167 | |     benchmarks: Vec<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<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 | /     #[structopt(short, long, default_value = "out/benchmark.csv")]
[INFO] [stdout] 176 | |     filename: String,
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 | /     #[structopt(long, default_value = "all")]
[INFO] [stdout] 178 | |     strategy: String,
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:166:5
[INFO] [stdout]     |
[INFO] [stdout] 166 | /     #[structopt(short, long, value_delimiter = ",", default_value = "math,lambda")]
[INFO] [stdout] 167 | |     benchmarks: Vec<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<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 | /     #[structopt(short, long, default_value = "out/benchmark.csv")]
[INFO] [stdout] 176 | |     filename: String,
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 | /     #[structopt(long, default_value = "all")]
[INFO] [stdout] 178 | |     strategy: String,
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/lambda.rs:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | / define_language! {
[INFO] [stdout] 46 | |     pub enum Lambda {
[INFO] [stdout] 47 | |         Bool(bool),
[INFO] [stdout] 48 | |         Num(i32),
[INFO] [stdout] ...  |
[INFO] [stdout] 64 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/lambda.rs:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | / define_language! {
[INFO] [stdout] 46 | |     pub enum Lambda {
[INFO] [stdout] 47 | |         Bool(bool),
[INFO] [stdout] 48 | |         Num(i32),
[INFO] [stdout] ...  |
[INFO] [stdout] 64 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/lambda.rs:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | / define_language! {
[INFO] [stdout] 46 | |     pub enum Lambda {
[INFO] [stdout] 47 | |         Bool(bool),
[INFO] [stdout] 48 | |         Num(i32),
[INFO] [stdout] ...  |
[INFO] [stdout] 64 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/math.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | / define_language! {
[INFO] [stdout] 27 | |     pub enum Math {
[INFO] [stdout] 28 | |         "d" = Diff([Id; 2]),
[INFO] [stdout] 29 | |         "i" = Integral([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/math.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | / define_language! {
[INFO] [stdout] 27 | |     pub enum Math {
[INFO] [stdout] 28 | |         "d" = Diff([Id; 2]),
[INFO] [stdout] 29 | |         "i" = Integral([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/lambda.rs:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | / define_language! {
[INFO] [stdout] 46 | |     pub enum Lambda {
[INFO] [stdout] 47 | |         Bool(bool),
[INFO] [stdout] 48 | |         Num(i32),
[INFO] [stdout] ...  |
[INFO] [stdout] 64 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/math.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | / define_language! {
[INFO] [stdout] 27 | |     pub enum Math {
[INFO] [stdout] 28 | |         "d" = Diff([Id; 2]),
[INFO] [stdout] 29 | |         "i" = Integral([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Symbol, Infallible>
[INFO] [stdout]   --> src/math.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | / define_language! {
[INFO] [stdout] 27 | |     pub enum Math {
[INFO] [stdout] 28 | |         "d" = Diff([Id; 2]),
[INFO] [stdout] 29 | |         "i" = Integral([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `egg-bench` (bin "egg-bench" test) due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `egg-bench` (bin "egg-bench") due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "f0c0a5ca7fc8b51f22cc6697fcd839ec91daf79e56ffe660e16367d8adcf40f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0c0a5ca7fc8b51f22cc6697fcd839ec91daf79e56ffe660e16367d8adcf40f7", kill_on_drop: false }`
[INFO] [stdout] f0c0a5ca7fc8b51f22cc6697fcd839ec91daf79e56ffe660e16367d8adcf40f7
