[INFO] fetching crate underscore 0.0.2...
[INFO] testing underscore-0.0.2 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate underscore 0.0.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate underscore 0.0.2
[INFO] finished tweaking crates.io crate underscore 0.0.2
[INFO] tweaked toml for crates.io crate underscore 0.0.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate underscore 0.0.2 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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" "+beta-2025-09-21" "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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4de29afa4cca6f2b49901a95ba3b5bb166a6deecb9894957972f1b0e50ef35ac
[INFO] running `Command { std: "docker" "start" "-a" "4de29afa4cca6f2b49901a95ba3b5bb166a6deecb9894957972f1b0e50ef35ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4de29afa4cca6f2b49901a95ba3b5bb166a6deecb9894957972f1b0e50ef35ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4de29afa4cca6f2b49901a95ba3b5bb166a6deecb9894957972f1b0e50ef35ac", kill_on_drop: false }`
[INFO] [stdout] 4de29afa4cca6f2b49901a95ba3b5bb166a6deecb9894957972f1b0e50ef35ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c1ac967993277996ff06c08700863e103f6087ed0f2fd9f176700fd1417d9a2
[INFO] running `Command { std: "docker" "start" "-a" "2c1ac967993277996ff06c08700863e103f6087ed0f2fd9f176700fd1417d9a2", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling underscore v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/vec/mod.rs:90:24
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn reject(self, f: |value: &T| -> bool) -> Vec<T>;
[INFO] [stdout]    |                        ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/vec/expand.rs:66:24
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn reject(self, f: |value: &T| -> bool) -> Vec<T> {
[INFO] [stdout]    |                        ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/hashmap/mod.rs:60:32
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V>;
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected argument name, found `|`
[INFO] [stdout]   --> src/hashmap/mod.rs:60:45
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V>;
[INFO] [stdout]    |                                             ^ expected argument name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/hashmap/mod.rs:60:45
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V>;
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/hashmap/mod.rs:99:32
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V>;
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected argument name, found `|`
[INFO] [stdout]   --> src/hashmap/mod.rs:99:45
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V>;
[INFO] [stdout]    |                                             ^ expected argument name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/hashmap/mod.rs:99:45
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V>;
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/hashmap/expands.rs:26:32
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V> {
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected parameter name, found `->`
[INFO] [stdout]   --> src/hashmap/expands.rs:26:47
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V> {
[INFO] [stdout]    |                                               ^^ expected parameter name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/hashmap/expands.rs:26:45
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V> {
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/hashmap/expands.rs:45:32
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V> {
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected parameter name, found `->`
[INFO] [stdout]   --> src/hashmap/expands.rs:45:47
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V> {
[INFO] [stdout]    |                                               ^^ expected parameter name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/hashmap/expands.rs:45:45
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> HashMap<K, V> {
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/btreemap/mod.rs:60:32
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V>;
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected argument name, found `|`
[INFO] [stdout]   --> src/btreemap/mod.rs:60:45
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V>;
[INFO] [stdout]    |                                             ^ expected argument name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/btreemap/mod.rs:60:45
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V>;
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/btreemap/mod.rs:99:32
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V>;
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected argument name, found `|`
[INFO] [stdout]   --> src/btreemap/mod.rs:99:45
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V>;
[INFO] [stdout]    |                                             ^ expected argument name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/btreemap/mod.rs:99:45
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V>;
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/btreemap/expands.rs:26:32
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V> {
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected parameter name, found `->`
[INFO] [stdout]   --> src/btreemap/expands.rs:26:47
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V> {
[INFO] [stdout]    |                                               ^^ expected parameter name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/btreemap/expands.rs:26:45
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn pick_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V> {
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]   --> src/btreemap/expands.rs:42:32
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V> {
[INFO] [stdout]    |                                ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected parameter name, found `->`
[INFO] [stdout]   --> src/btreemap/expands.rs:42:47
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V> {
[INFO] [stdout]    |                                               ^^ expected parameter name
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!`, `(`, `)`, `,`, `::`, or `<`, found `|`
[INFO] [stdout]   --> src/btreemap/expands.rs:42:45
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn omit_by_filter(self, f: |k: &K, v: &V| -> bool) -> BTreeMap<K, V> {
[INFO] [stdout]    |                                             ^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected one of `!`, `(`, `)`, `,`, `::`, or `<`
[INFO] [stdout]    |                                             help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `uint` in this scope
[INFO] [stdout]   --> src/vec/expand.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn index_of(&self, value: &T) -> Option<uint> {
[INFO] [stdout]    |                                             ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a type parameter
[INFO] [stdout]    |
[INFO] [stdout]  4 | impl<T: PartialEq + Clone + Ord, uint> VecU<T> for Vec<T>{
[INFO] [stdout]    |                                ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `uint` in this scope
[INFO] [stdout]   --> src/vec/expand.rs:47:50
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn last_index_of(&self, value: &T) -> Option<uint> {
[INFO] [stdout]    |                                                  ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a type parameter
[INFO] [stdout]    |
[INFO] [stdout]  4 | impl<T: PartialEq + Clone + Ord, uint> VecU<T> for Vec<T>{
[INFO] [stdout]    |                                ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `range` in this scope
[INFO] [stdout]   --> src/vec/expand.rs:60:18
[INFO] [stdout]    |
[INFO] [stdout] 60 |         for i in range(0u, self.len() - 1) {
[INFO] [stdout]    |                  ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout]  1 + use std::slice::range;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `uint` in this scope
[INFO] [stdout]   --> src/vec/mod.rs:59:45
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn index_of(&self, value: &T) -> Option<uint>;
[INFO] [stdout]    |                                             ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a type parameter
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub trait VecU<T, uint> {
[INFO] [stdout]    |                 ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `uint` in this scope
[INFO] [stdout]   --> src/vec/mod.rs:69:50
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn last_index_of(&self, value: &T) -> Option<uint>;
[INFO] [stdout]    |                                                  ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a type parameter
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub trait VecU<T, uint> {
[INFO] [stdout]    |                 ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid suffix `u` for number literal
[INFO] [stdout]   --> src/vec/expand.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut index = 0u;
[INFO] [stdout]    |                         ^^ invalid suffix `u`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid suffix `u` for number literal
[INFO] [stdout]   --> src/vec/expand.rs:60:24
[INFO] [stdout]    |
[INFO] [stdout] 60 |         for i in range(0u, self.len() - 1) {
[INFO] [stdout]    |                        ^^ invalid suffix `u`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `f` in this scope
[INFO] [stdout]   --> src/vec/expand.rs:69:18
[INFO] [stdout]    |
[INFO] [stdout] 69 |             if ! f(&element) { rejected.push(element) }
[INFO] [stdout]    |                  ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hashmap/expands.rs:19:30
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl<'a, K: Eq + Hash + Clone, V: Eq + Hash + Clone> HashMapU<K, V> for HashMap<K, V> {
[INFO] [stdout]    |          - found this type parameter
[INFO] [stdout] ...
[INFO] [stdout] 19 |                 let v = self[element].clone();
[INFO] [stdout]    |                              ^^^^^^^ expected `&K`, found type parameter `K`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected reference `&_`
[INFO] [stdout]            found type parameter `_`
[INFO] [stdout] help: consider borrowing here
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 let v = self[&element].clone();
[INFO] [stdout]    |                              +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hashmap/expands.rs:30:31
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl<'a, K: Eq + Hash + Clone, V: Eq + Hash + Clone> HashMapU<K, V> for HashMap<K, V> {
[INFO] [stdout]    |          - found this type parameter
[INFO] [stdout] ...
[INFO] [stdout] 30 |             let cp_val = self[cp_key].clone();
[INFO] [stdout]    |                               ^^^^^^ expected `&K`, found type parameter `K`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected reference `&_`
[INFO] [stdout]            found type parameter `_`
[INFO] [stdout] help: consider borrowing here
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let cp_val = self[&cp_key].clone();
[INFO] [stdout]    |                               +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `f` in this scope
[INFO] [stdout]   --> src/hashmap/expands.rs:31:16
[INFO] [stdout]    |
[INFO] [stdout] 31 |             if f(&cp_key, &cp_val) { picked.insert(cp_key, cp_val); }
[INFO] [stdout]    |                ^ help: a local variable with a similar name exists: `v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hashmap/expands.rs:49:31
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl<'a, K: Eq + Hash + Clone, V: Eq + Hash + Clone> HashMapU<K, V> for HashMap<K, V> {
[INFO] [stdout]    |          - found this type parameter
[INFO] [stdout] ...
[INFO] [stdout] 49 |             let cp_val = self[cp_key].clone();
[INFO] [stdout]    |                               ^^^^^^ expected `&K`, found type parameter `K`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected reference `&_`
[INFO] [stdout]            found type parameter `_`
[INFO] [stdout] help: consider borrowing here
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let cp_val = self[&cp_key].clone();
[INFO] [stdout]    |                               +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `f` in this scope
[INFO] [stdout]   --> src/hashmap/expands.rs:50:18
[INFO] [stdout]    |
[INFO] [stdout] 50 |             if ! f(&cp_key, &cp_val) { omitted.insert(cp_key, cp_val); }
[INFO] [stdout]    |                  ^ help: a local variable with a similar name exists: `v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `f` in this scope
[INFO] [stdout]   --> src/btreemap/expands.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |             if f(&key, &value) { picked.insert(key, value); }
[INFO] [stdout]    |                ^ help: a local variable with a similar name exists: `v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `f` in this scope
[INFO] [stdout]   --> src/btreemap/expands.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |             if ! f(&key, &value) { omitted.insert(key, value); }
[INFO] [stdout]    |                  ^ help: a local variable with a similar name exists: `v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0412, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `underscore` (lib) due to 41 previous errors
[INFO] running `Command { std: "docker" "inspect" "2c1ac967993277996ff06c08700863e103f6087ed0f2fd9f176700fd1417d9a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c1ac967993277996ff06c08700863e103f6087ed0f2fd9f176700fd1417d9a2", kill_on_drop: false }`
[INFO] [stdout] 2c1ac967993277996ff06c08700863e103f6087ed0f2fd9f176700fd1417d9a2
