[INFO] cloning repository https://github.com/FredTheDino/thidy-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FredTheDino/thidy-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredTheDino%2Fthidy-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredTheDino%2Fthidy-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b7ec677581cf1d9327d1faff1152a922db7cd1a
[INFO] checking FredTheDino/thidy-lang against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredTheDino%2Fthidy-lang" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/FredTheDino/thidy-lang
[INFO] finished tweaking git repo https://github.com/FredTheDino/thidy-lang
[INFO] tweaked toml for git repo https://github.com/FredTheDino/thidy-lang written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/FredTheDino/thidy-lang on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/FredTheDino/thidy-lang 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 797daefa36c51a06230a77ace46430a753460c89e09d6b7ac6f70640bf84c033
[INFO] running `Command { std: "docker" "start" "-a" "797daefa36c51a06230a77ace46430a753460c89e09d6b7ac6f70640bf84c033", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "797daefa36c51a06230a77ace46430a753460c89e09d6b7ac6f70640bf84c033", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "797daefa36c51a06230a77ace46430a753460c89e09d6b7ac6f70640bf84c033", kill_on_drop: false }`
[INFO] [stdout] 797daefa36c51a06230a77ace46430a753460c89e09d6b7ac6f70640bf84c033
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2b105b9945186985a52cf166908073bb7d23faeae88071a18bc1f559a64bcbc
[INFO] running `Command { std: "docker" "start" "-a" "e2b105b9945186985a52cf166908073bb7d23faeae88071a18bc1f559a64bcbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling beef v0.5.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking levenshtein v1.0.5
[INFO] [stderr]    Compiling sylt v0.2.0 (/opt/rustwide/workdir/sylt)
[INFO] [stderr]     Checking sungod v0.3.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking sylt-macro v0.2.0 (/opt/rustwide/workdir/sylt-macro)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> sylt-macro/src/macro.rs:350:31
[INFO] [stdout]     |
[INFO] [stdout] 350 |         struct ArgItem(Ident, Token![=], Expr);
[INFO] [stdout]     |                -------        ^^^^^^^^^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 350 -         struct ArgItem(Ident, Token![=], Expr);
[INFO] [stdout] 350 +         struct ArgItem(Ident, (), Expr);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> sylt-macro/src/macro.rs:350:31
[INFO] [stdout]     |
[INFO] [stdout] 350 |         struct ArgItem(Ident, Token![=], Expr);
[INFO] [stdout]     |                -------        ^^^^^^^^^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 350 -         struct ArgItem(Ident, Token![=], Expr);
[INFO] [stdout] 350 +         struct ArgItem(Ident, (), Expr);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling logos-derive v0.12.0
[INFO] [stderr]    Compiling gumdrop_derive v0.8.0
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> sylt-macro/src/macro.rs:350:31
[INFO] [stdout]     |
[INFO] [stdout] 350 |         struct ArgItem(Ident, Token![=], Expr);
[INFO] [stdout]     |                -------        ^^^^^^^^^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 350 -         struct ArgItem(Ident, Token![=], Expr);
[INFO] [stdout] 350 +         struct ArgItem(Ident, (), Expr);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking gumdrop v0.8.0
[INFO] [stderr]     Checking logos v0.12.0
[INFO] [stderr]     Checking sylt-tokenizer v0.2.0 (/opt/rustwide/workdir/sylt-tokenizer)
[INFO] [stderr]     Checking sylt-common v0.2.0 (/opt/rustwide/workdir/sylt-common)
[INFO] [stderr]     Checking sylt-parser v0.2.0 (/opt/rustwide/workdir/sylt-parser)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> sylt-parser/src/parser.rs:917:5
[INFO] [stdout]     |
[INFO] [stdout] 917 |     drop(enum_name);
[INFO] [stdout]     |     ^^^^^---------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&Identifier`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 917 -     drop(enum_name);
[INFO] [stdout] 917 +     let _ = enum_name;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> sylt-parser/src/statement.rs:739:49
[INFO] [stdout]     |
[INFO] [stdout] 739 | pub fn outer_statement<'t>(ctx: Context<'t>) -> ParseResult<Statement> {
[INFO] [stdout]     |                                         --      ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                         |
[INFO] [stdout]     |                                         the lifetime is named 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: consistently use `'t`
[INFO] [stdout]     |
[INFO] [stdout] 739 | pub fn outer_statement<'t>(ctx: Context<'t>) -> ParseResult<'t, Statement> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking sylt-compiler v0.2.0 (/opt/rustwide/workdir/sylt-compiler)
[INFO] [stdout] warning: field `file_to_namespace` is never read
[INFO] [stdout]    --> sylt-compiler/src/typechecker.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 163 | pub struct TypeChecker {
[INFO] [stdout]     |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub file_to_namespace: HashMap<FileOrLib, NamespaceID>,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `file_to_namespace` is never read
[INFO] [stdout]    --> sylt-compiler/src/typechecker.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 163 | pub struct TypeChecker {
[INFO] [stdout]     |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub file_to_namespace: HashMap<FileOrLib, NamespaceID>,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> sylt-parser/src/parser.rs:917:5
[INFO] [stdout]     |
[INFO] [stdout] 917 |     drop(enum_name);
[INFO] [stdout]     |     ^^^^^---------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&Identifier`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 917 -     drop(enum_name);
[INFO] [stdout] 917 +     let _ = enum_name;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> sylt-parser/src/statement.rs:739:49
[INFO] [stdout]     |
[INFO] [stdout] 739 | pub fn outer_statement<'t>(ctx: Context<'t>) -> ParseResult<Statement> {
[INFO] [stdout]     |                                         --      ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                         |
[INFO] [stdout]     |                                         the lifetime is named 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: consistently use `'t`
[INFO] [stdout]     |
[INFO] [stdout] 739 | pub fn outer_statement<'t>(ctx: Context<'t>) -> ParseResult<'t, Statement> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> sylt/src/lib.rs:90:26
[INFO] [stdout]    |
[INFO] [stdout] 90 | #[derive(Default, Debug, Options)]
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `Options` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> sylt/src/lib.rs:90:26
[INFO] [stdout]    |
[INFO] [stdout] 90 | #[derive(Default, Debug, Options)]
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Options` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sylt` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> sylt/src/lib.rs:90:26
[INFO] [stdout]    |
[INFO] [stdout] 90 | #[derive(Default, Debug, Options)]
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `Options` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> sylt/src/lib.rs:90:26
[INFO] [stdout]    |
[INFO] [stdout] 90 | #[derive(Default, Debug, Options)]
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Options` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sylt` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e2b105b9945186985a52cf166908073bb7d23faeae88071a18bc1f559a64bcbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2b105b9945186985a52cf166908073bb7d23faeae88071a18bc1f559a64bcbc", kill_on_drop: false }`
[INFO] [stdout] e2b105b9945186985a52cf166908073bb7d23faeae88071a18bc1f559a64bcbc
