[INFO] cloning repository https://github.com/imkiva/mahiro-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/imkiva/mahiro-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimkiva%2Fmahiro-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimkiva%2Fmahiro-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32b3e0f55cc22274df9f6f8aa1b9fcaf02cc370e
[INFO] checking imkiva/mahiro-rs against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimkiva%2Fmahiro-rs" "/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/imkiva/mahiro-rs
[INFO] finished tweaking git repo https://github.com/imkiva/mahiro-rs
[INFO] tweaked toml for git repo https://github.com/imkiva/mahiro-rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/imkiva/mahiro-rs on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/imkiva/mahiro-rs 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" "+507271bc119683008ec719ecee48814e8ac86c65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lalrpop-util v0.19.1
[INFO] [stderr]   Downloaded phf_shared v0.8.0
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[INFO] [stderr]   Downloaded blake2b_simd v0.5.10
[INFO] [stderr]   Downloaded serde v1.0.116
[INFO] [stderr]   Downloaded serde_derive v1.0.116
[INFO] [stderr]   Downloaded regex v1.4.1
[INFO] [stderr]   Downloaded aho-corasick v0.7.14
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[INFO] [stderr]   Downloaded syn v1.0.44
[INFO] [stderr]   Downloaded regex-syntax v0.6.20
[INFO] [stderr]   Downloaded libc v0.2.79
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3d542d9fe7901df0baebba49a26f2b64de804a8acff556e30c5e49b002ef0d2
[INFO] running `Command { std: "docker" "start" "-a" "a3d542d9fe7901df0baebba49a26f2b64de804a8acff556e30c5e49b002ef0d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3d542d9fe7901df0baebba49a26f2b64de804a8acff556e30c5e49b002ef0d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3d542d9fe7901df0baebba49a26f2b64de804a8acff556e30c5e49b002ef0d2", kill_on_drop: false }`
[INFO] [stdout] a3d542d9fe7901df0baebba49a26f2b64de804a8acff556e30c5e49b002ef0d2
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c31188eacae34612ec24eb9457e17a0efa8d7264ec925dfe33dcc04993973f8
[INFO] running `Command { std: "docker" "start" "-a" "5c31188eacae34612ec24eb9457e17a0efa8d7264ec925dfe33dcc04993973f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling regex-syntax v0.6.20
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]     Checking build_system v0.1.0 (/opt/rustwide/workdir/build_system)
[INFO] [stderr]     Checking vm v0.1.0 (/opt/rustwide/workdir/vm)
[INFO] [stdout] warning: fields `stack`, `frame`, `caller_regs`, and `code` are never read
[INFO] [stdout]   --> vm/src/vm.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Executor<'a> {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 15 |   stack: &'a Stack,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 16 |   frame: &'a Frame,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 17 |   caller_regs: &'a CallerRegisters,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 18 |   code: &'a Vec<Opcode>,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Executor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `stack`, `frame`, `caller_regs`, and `exception` are never read
[INFO] [stdout]   --> vm/src/vm.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct MahiroVM {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 23 |   stack: Stack,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 24 |   frame: VecDeque<Frame>,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 25 |   caller_regs: CallerRegisters,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 26 |   exception: Option<Value>,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MahiroVM` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push` and `pop` are never used
[INFO] [stdout]   --> vm/src/vm.rs:39:6
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl MahiroVM {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 39 |   fn push(&mut self, v: Value) {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |   fn pop(&mut self) -> Value {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex v1.4.1
[INFO] [stderr]    Compiling lalrpop-util v0.19.1
[INFO] [stderr]    Compiling string_cache v0.8.0
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.19.1
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/rustwide/workdir/lang)
[INFO] [stdout] warning: unused imports: `Expr` and `Param`
[INFO] [stdout]  --> lang/src/sugar/async_fn.rs:1:46
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::syntax::tree::{Decl, FnSig, Stmt, Expr, Param};
[INFO] [stdout]   |                                              ^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]   --> lang/src/syntax/parser.rs:1:20
[INFO] [stdout]    |
[INFO] [stdout]  1 | use lalrpop_util::{lexer::Token, ParseError as PE, ParseError};
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the name `Token` in the type namespace is supposed to be publicly re-exported here
[INFO] [stdout]   --> lang/src/syntax/parser.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use grammar::*;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]   --> lang/src/syntax/parser.rs:1:20
[INFO] [stdout]    |
[INFO] [stdout]  1 | use lalrpop_util::{lexer::Token, ParseError as PE, ParseError};
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]   --> lang/src/syntax/parser.rs:1:20
[INFO] [stdout]    |
[INFO] [stdout]  1 | use lalrpop_util::{lexer::Token, ParseError as PE, ParseError};
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the name `Token` in the value namespace is supposed to be publicly re-exported here
[INFO] [stdout]   --> lang/src/syntax/parser.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use grammar::*;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]   --> lang/src/syntax/parser.rs:1:20
[INFO] [stdout]    |
[INFO] [stdout]  1 | use lalrpop_util::{lexer::Token, ParseError as PE, ParseError};
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> lang/src/error/position.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |   pub(crate) unsafe fn new_unchecked(input: &str, pos: usize) -> Position {
[INFO] [stdout]    |                                             ^^^^                 ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |   pub(crate) unsafe fn new_unchecked(input: &str, pos: usize) -> Position<'_> {
[INFO] [stdout]    |                                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> lang/src/error/position.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |   pub fn new(input: &str, pos: usize) -> Option<Position> {
[INFO] [stdout]    |                     ^^^^                        ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 59 |   pub fn new(input: &str, pos: usize) -> Option<Position<'_>> {
[INFO] [stdout]    |                                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> lang/src/error/span.rs:45:45
[INFO] [stdout]    |
[INFO] [stdout] 45 |   pub(crate) unsafe fn new_unchecked(input: &str, start: usize, end: usize) -> Span {
[INFO] [stdout]    |                                             ^^^^ the lifetime is elided here   ^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |   pub(crate) unsafe fn new_unchecked(input: &str, start: usize, end: usize) -> Span<'_> {
[INFO] [stdout]    |                                                                                    ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> lang/src/error/span.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 62 |   pub fn new(input: &str, start: usize, end: usize) -> Option<Span> {
[INFO] [stdout]    |                     ^^^^ the lifetime is elided here          ^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 62 |   pub fn new(input: &str, start: usize, end: usize) -> Option<Span<'_>> {
[INFO] [stdout]    |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lang/src/error/span.rs:207:16
[INFO] [stdout]     |
[INFO] [stdout] 207 |   pub fn lines(&self) -> Lines {
[INFO] [stdout]     |                ^^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 207 |   pub fn lines(&self) -> Lines<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mahiro-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 47.63s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: lalrpop v0.19.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "5c31188eacae34612ec24eb9457e17a0efa8d7264ec925dfe33dcc04993973f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c31188eacae34612ec24eb9457e17a0efa8d7264ec925dfe33dcc04993973f8", kill_on_drop: false }`
[INFO] [stdout] 5c31188eacae34612ec24eb9457e17a0efa8d7264ec925dfe33dcc04993973f8
