[INFO] fetching crate n-functor 0.2.1...
[INFO] checking n-functor-0.2.1 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate n-functor 0.2.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate n-functor 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate n-functor 0.2.1
[INFO] tweaked toml for crates.io crate n-functor 0.2.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate n-functor 0.2.1 on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate n-functor 0.2.1 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a537806c4a8304644e376ffb1e7e970b9dc40827d19447de5b6a964ff7611cbb
[INFO] running `Command { std: "docker" "start" "-a" "a537806c4a8304644e376ffb1e7e970b9dc40827d19447de5b6a964ff7611cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a537806c4a8304644e376ffb1e7e970b9dc40827d19447de5b6a964ff7611cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a537806c4a8304644e376ffb1e7e970b9dc40827d19447de5b6a964ff7611cbb", kill_on_drop: false }`
[INFO] [stdout] a537806c4a8304644e376ffb1e7e970b9dc40827d19447de5b6a964ff7611cbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] acf8053efa3bd476753cdfad3c0a9ef17993772f1e8d32b8c285fa3ad289bf03
[INFO] running `Command { std: "docker" "start" "-a" "acf8053efa3bd476753cdfad3c0a9ef17993772f1e8d32b8c285fa3ad289bf03", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.102
[INFO] [stderr]     Checking n-functor v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `CustomMap` is never constructed
[INFO] [stdout]   --> examples/n-functor.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct CustomMap<A> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `TuplesAreDire` is never constructed
[INFO] [stdout]   --> examples/n-functor.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub struct TuplesAreDire<A, B>(#[map_with(sorry_for_tuples, sorry_for_tuples_map_res)] (A, B));
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Recursion` is never constructed
[INFO] [stdout]   --> examples/n-functor.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Recursion<A, B> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Opt` is never constructed
[INFO] [stdout]    --> examples/n-functor.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 | pub struct Opt<A>(Option<A>);
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sorry_for_tuples_map_res` is never used
[INFO] [stdout]   --> examples/n-functor.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn sorry_for_tuples_map_res<A, B, A2, B2, E>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `map_res_for_option` is never used
[INFO] [stdout]   --> examples/n-functor.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn map_res_for_option<A, A2, E>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `map_res_for_option_option` is never used
[INFO] [stdout]    --> examples/n-functor.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl<A, B> Recursion<A, B> {
[INFO] [stdout]     | -------------------------- associated function in this implementation
[INFO] [stdout] 102 |     fn map_res_for_option_option<B2, E>(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `n-functor` (example "n-functor") due to 4 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "acf8053efa3bd476753cdfad3c0a9ef17993772f1e8d32b8c285fa3ad289bf03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acf8053efa3bd476753cdfad3c0a9ef17993772f1e8d32b8c285fa3ad289bf03", kill_on_drop: false }`
[INFO] [stdout] acf8053efa3bd476753cdfad3c0a9ef17993772f1e8d32b8c285fa3ad289bf03
