[INFO] cloning repository https://github.com/pkwww/vareff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pkwww/vareff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkwww%2Fvareff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkwww%2Fvareff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49d13801e5c74ba587eca50f6e05b6eeea637cd8
[INFO] checking pkwww/vareff against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkwww%2Fvareff" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pkwww/vareff
[INFO] finished tweaking git repo https://github.com/pkwww/vareff
[INFO] tweaked toml for git repo https://github.com/pkwww/vareff written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pkwww/vareff on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pkwww/vareff 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57481d9a63f7fce5bde66341bb41aa3cfeabe0358ee45e820a7ad1bab67911b3
[INFO] running `Command { std: "docker" "start" "-a" "57481d9a63f7fce5bde66341bb41aa3cfeabe0358ee45e820a7ad1bab67911b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57481d9a63f7fce5bde66341bb41aa3cfeabe0358ee45e820a7ad1bab67911b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57481d9a63f7fce5bde66341bb41aa3cfeabe0358ee45e820a7ad1bab67911b3", kill_on_drop: false }`
[INFO] [stdout] 57481d9a63f7fce5bde66341bb41aa3cfeabe0358ee45e820a7ad1bab67911b3
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a8c7497ebd7090c2fea8c6b15294dd051ad632b2c3e1a5e6e58f99c23c63a2c
[INFO] running `Command { std: "docker" "start" "-a" "2a8c7497ebd7090c2fea8c6b15294dd051ad632b2c3e1a5e6e58f99c23c63a2c", kill_on_drop: false }`
[INFO] [stderr]     Checking vareff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/eval_eff.rs:61:27
[INFO] [stdout]    |
[INFO] [stdout] 61 |             Reader::Query(n, k) => panic!(""),
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/eval_eff.rs:61:30
[INFO] [stdout]    |
[INFO] [stdout] 61 |             Reader::Query(n, k) => panic!(""),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ans` and `Query` are never constructed
[INFO] [stdout]  --> src/eval_eff.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Reader<T: Copy> {
[INFO] [stdout]   |          ------ variants in this enum
[INFO] [stdout] 8 |     Ans(T),
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 9 |     Query(Name, Cont<T>),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VarEff` is never constructed
[INFO] [stdout]   --> src/eval_eff.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct VarEff;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated functions are never used
[INFO] [stdout]   --> src/eval_eff.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl VarEff {
[INFO] [stdout]    | ----------- associated functions in this implementation
[INFO] [stdout] 16 |     fn ans<T: Copy>(val: T) -> Reader<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn var<T: Copy>(var_name: Name) -> Reader<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn lift2<T: 'static + Copy>(bin_op: fn(T, T) -> T, r1: Reader<T>, r2: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn lift<T: 'static + Copy>(k1: Cont<T>, r: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn handle_var<T: 'static + Copy>(ret: fn(T) -> Reader<T>, lookup: Box<dyn Fn(&str) -> Option<T>>, r: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn letv<T: 'static + Copy>(name: Name, val: T, r: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn top_hand<T: Copy>(r: Reader<T>) -> T {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EvalEff` is never constructed
[INFO] [stdout]   --> src/eval_eff.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub struct EvalEff;
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/eval_eff.rs:61:27
[INFO] [stdout]    |
[INFO] [stdout] 61 |             Reader::Query(n, k) => panic!(""),
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/eval_eff.rs:61:30
[INFO] [stdout]    |
[INFO] [stdout] 61 |             Reader::Query(n, k) => panic!(""),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ans` and `Query` are never constructed
[INFO] [stdout]  --> src/eval_eff.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Reader<T: Copy> {
[INFO] [stdout]   |          ------ variants in this enum
[INFO] [stdout] 8 |     Ans(T),
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 9 |     Query(Name, Cont<T>),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VarEff` is never constructed
[INFO] [stdout]   --> src/eval_eff.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct VarEff;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated functions are never used
[INFO] [stdout]   --> src/eval_eff.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl VarEff {
[INFO] [stdout]    | ----------- associated functions in this implementation
[INFO] [stdout] 16 |     fn ans<T: Copy>(val: T) -> Reader<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn var<T: Copy>(var_name: Name) -> Reader<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn lift2<T: 'static + Copy>(bin_op: fn(T, T) -> T, r1: Reader<T>, r2: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn lift<T: 'static + Copy>(k1: Cont<T>, r: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn handle_var<T: 'static + Copy>(ret: fn(T) -> Reader<T>, lookup: Box<dyn Fn(&str) -> Option<T>>, r: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn letv<T: 'static + Copy>(name: Name, val: T, r: Reader<T>) -> Reader<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn top_hand<T: Copy>(r: Reader<T>) -> T {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EvalEff` is never constructed
[INFO] [stdout]   --> src/eval_eff.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub struct EvalEff;
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "2a8c7497ebd7090c2fea8c6b15294dd051ad632b2c3e1a5e6e58f99c23c63a2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a8c7497ebd7090c2fea8c6b15294dd051ad632b2c3e1a5e6e58f99c23c63a2c", kill_on_drop: false }`
[INFO] [stdout] 2a8c7497ebd7090c2fea8c6b15294dd051ad632b2c3e1a5e6e58f99c23c63a2c