[INFO] updating cached repository https://github.com/qferbs/brain-lambda
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e3942d76a98a20b4a06be98d067f240940255e25
[INFO] checking qferbs/brain-lambda against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqferbs%2Fbrain-lambda" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qferbs/brain-lambda on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/qferbs/brain-lambda
[INFO] finished tweaking git repo https://github.com/qferbs/brain-lambda
[INFO] tweaked toml for git repo https://github.com/qferbs/brain-lambda written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/qferbs/brain-lambda already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 56cacd847ec223f7f98ea0d80e00b32dfebdd3802851aca9074135a29d817ef0
[INFO] running `"docker" "start" "-a" "56cacd847ec223f7f98ea0d80e00b32dfebdd3802851aca9074135a29d817ef0"`
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking brainfuck v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]  --> src/compile.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn compile(expr: Expression<u32>) -> Result<(), CompilationError> {
[INFO] [stderr]   |            ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_bf`
[INFO] [stderr]  --> src/brainfuck_ops.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn to_bf(&self, cur_reg: &mut Register) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `zero`
[INFO] [stderr]   --> src/brainfuck_ops.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn zero(&self, cur_reg: &mut Register) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_equals`
[INFO] [stderr]   --> src/brainfuck_ops.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn bf_equals(
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_not_equals`
[INFO] [stderr]   --> src/brainfuck_ops.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn bf_not_equals(
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_equality`
[INFO] [stderr]   --> src/brainfuck_ops.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn bf_equality(
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_equals_const`
[INFO] [stderr]    --> src/brainfuck_ops.rs:125:8
[INFO] [stderr]     |
[INFO] [stderr] 125 | pub fn bf_equals_const(
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_not_equals_const`
[INFO] [stderr]    --> src/brainfuck_ops.rs:142:8
[INFO] [stderr]     |
[INFO] [stderr] 142 | pub fn bf_not_equals_const(
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_equality_const`
[INFO] [stderr]    --> src/brainfuck_ops.rs:152:4
[INFO] [stderr]     |
[INFO] [stderr] 152 | fn bf_equality_const(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bf_expand_const`
[INFO] [stderr]    --> src/brainfuck_ops.rs:189:8
[INFO] [stderr]     |
[INFO] [stderr] 189 | pub fn bf_expand_const(c: i32) -> String {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compile`
[INFO] [stderr]  --> src/compile.rs:4:4
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn compile(expr: Expression<u32>) -> Result<(), CompilationError> {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Variable`
[INFO] [stderr]  --> src/expression.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Variable(&'a str),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Literal`
[INFO] [stderr]  --> src/expression.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Literal(V),
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FuncArgs`
[INFO] [stderr]  --> src/expression.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     FuncArgs(Box<[&'a str]>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Function`
[INFO] [stderr]   --> src/expression.rs:7:5
[INFO] [stderr]    |
[INFO] [stderr] 7  | /     Function {
[INFO] [stderr] 8  | |         vars: Box<[&'a str]>,
[INFO] [stderr] 9  | |         lambda_term: Box<Expression<'a, V>>,
[INFO] [stderr] 10 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Operator`
[INFO] [stderr]   --> src/expression.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | /     Operator {
[INFO] [stderr] 12 | |         tok: &'a str,
[INFO] [stderr] 13 | |         op: Box<dyn Fn(V, V) -> V>,
[INFO] [stderr] 14 | |         lhs_expr: Box<Expression<'a, V>>,
[INFO] [stderr] 15 | |         rhs_expr: Box<Expression<'a, V>>,
[INFO] [stderr] 16 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Application`
[INFO] [stderr]   --> src/expression.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     Application {
[INFO] [stderr] 18 | |         func: Box<Expression<'a, V>>,
[INFO] [stderr] 19 | |         inputs: Vec<Expression<'a, V>>,
[INFO] [stderr] 20 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SEP`
[INFO] [stderr]   --> src/parsing.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |               const $i: $t = &[$($x),+];
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 | / comb_const! {
[INFO] [stderr] 29 | |     SEP_AND_OP, &[char];
[INFO] [stderr] 30 | |     SEP, '{', '}','(',')';
[INFO] [stderr] 31 | |     OP, '+', '-', '/', '*';
[INFO] [stderr] 32 | |     WHITESPACE, ' ', '\r', '\n', '\t';
[INFO] [stderr] 33 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OP`
[INFO] [stderr]   --> src/parsing.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |               const $i: $t = &[$($x),+];
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 | / comb_const! {
[INFO] [stderr] 29 | |     SEP_AND_OP, &[char];
[INFO] [stderr] 30 | |     SEP, '{', '}','(',')';
[INFO] [stderr] 31 | |     OP, '+', '-', '/', '*';
[INFO] [stderr] 32 | |     WHITESPACE, ' ', '\r', '\n', '\t';
[INFO] [stderr] 33 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `WHITESPACE`
[INFO] [stderr]   --> src/parsing.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |               const $i: $t = &[$($x),+];
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 | / comb_const! {
[INFO] [stderr] 29 | |     SEP_AND_OP, &[char];
[INFO] [stderr] 30 | |     SEP, '{', '}','(',')';
[INFO] [stderr] 31 | |     OP, '+', '-', '/', '*';
[INFO] [stderr] 32 | |     WHITESPACE, ' ', '\r', '\n', '\t';
[INFO] [stderr] 33 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SEP_AND_OP`
[INFO] [stderr]   --> src/parsing.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |           const $a: $t = &[$($($x),+),+];
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 | / comb_const! {
[INFO] [stderr] 29 | |     SEP_AND_OP, &[char];
[INFO] [stderr] 30 | |     SEP, '{', '}','(',')';
[INFO] [stderr] 31 | |     OP, '+', '-', '/', '*';
[INFO] [stderr] 32 | |     WHITESPACE, ' ', '\r', '\n', '\t';
[INFO] [stderr] 33 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/parsing.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     Var(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Key`
[INFO] [stderr]   --> src/parsing.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Key(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Sep`
[INFO] [stderr]   --> src/parsing.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     Sep(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Op`
[INFO] [stderr]   --> src/parsing.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     Op(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lit`
[INFO] [stderr]   --> src/parsing.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     Lit(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FuncBody`
[INFO] [stderr]   --> src/parsing.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     FuncBody,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `EOF`
[INFO] [stderr]   --> src/parsing.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     EOF,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expr`
[INFO] [stderr]   --> src/parsing.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Expr, // generic
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_token`
[INFO] [stderr]   --> src/parsing.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     fn get_token(string: &str) -> Result<Token, TokenError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lex`
[INFO] [stderr]   --> src/parsing.rs:70:8
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub fn lex(string: &str) -> Result<Vec<Token>, TokenError> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse`
[INFO] [stderr]   --> src/parsing.rs:87:8
[INFO] [stderr]    |
[INFO] [stderr] 87 | pub fn parse<'a>(
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_tree`
[INFO] [stderr]   --> src/parsing.rs:93:8
[INFO] [stderr]    |
[INFO] [stderr] 93 | pub fn parse_tree<'a>(
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_expr`
[INFO] [stderr]    --> src/parsing.rs:123:8
[INFO] [stderr]     |
[INFO] [stderr] 123 | pub fn parse_expr<'a>(
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_op`
[INFO] [stderr]    --> src/parsing.rs:214:4
[INFO] [stderr]     |
[INFO] [stderr] 214 | fn get_op(op: &Token) -> Result<Box<dyn Fn(u32, u32) -> u32>, ParsingError> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_func_args`
[INFO] [stderr]    --> src/parsing.rs:226:4
[INFO] [stderr]     |
[INFO] [stderr] 226 | fn get_func_args<'a>(
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/parsing.rs:262:5
[INFO] [stderr]     |
[INFO] [stderr] 262 |     pub fn new(value: V, children: Vec<Tree<V>>) -> Tree<V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_debug_annotation`
[INFO] [stderr]   --> src/utils/compile_debug.rs:99:4
[INFO] [stderr]    |
[INFO] [stderr] 99 | fn parse_debug_annotation(lit: &str, cur_reg: &mut i32) -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/utils/split.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn new(string: &'a str, pattern: &'a [char]) -> Spliterator<'a> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]  --> src/compile.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn compile(expr: Expression<u32>) -> Result<(), CompilationError> {
[INFO] [stderr]   |            ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 39 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compile`
[INFO] [stderr]  --> src/compile.rs:4:4
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn compile(expr: Expression<u32>) -> Result<(), CompilationError> {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_debug_annotation`
[INFO] [stderr]   --> src/utils/compile_debug.rs:99:4
[INFO] [stderr]    |
[INFO] [stderr] 99 | fn parse_debug_annotation(lit: &str, cur_reg: &mut i32) -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.74s
[INFO] running `"docker" "inspect" "56cacd847ec223f7f98ea0d80e00b32dfebdd3802851aca9074135a29d817ef0"`
[INFO] running `"docker" "rm" "-f" "56cacd847ec223f7f98ea0d80e00b32dfebdd3802851aca9074135a29d817ef0"`
[INFO] [stdout] 56cacd847ec223f7f98ea0d80e00b32dfebdd3802851aca9074135a29d817ef0