[INFO] fetching crate fax 0.2.6... [INFO] checking fax-0.2.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate fax 0.2.6 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate fax 0.2.6 [INFO] removed 0 missing examples [INFO] removed 0 missing tests [INFO] finished tweaking crates.io crate fax 0.2.6 [INFO] tweaked toml for crates.io crate fax 0.2.6 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate fax 0.2.6 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 crates.io crate fax 0.2.6 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 52155310ca442dd9d740367aa97956b1f0f716653e723a7cee3d7f3024f620a1 [INFO] running `Command { std: "docker" "start" "-a" "52155310ca442dd9d740367aa97956b1f0f716653e723a7cee3d7f3024f620a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "52155310ca442dd9d740367aa97956b1f0f716653e723a7cee3d7f3024f620a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "52155310ca442dd9d740367aa97956b1f0f716653e723a7cee3d7f3024f620a1", kill_on_drop: false }` [INFO] [stdout] 52155310ca442dd9d740367aa97956b1f0f716653e723a7cee3d7f3024f620a1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 046d9dd9f99435818ebfd1e2902edd7d662653bf5303608b7c058258a120db6b [INFO] running `Command { std: "docker" "start" "-a" "046d9dd9f99435818ebfd1e2902edd7d662653bf5303608b7c058258a120db6b", kill_on_drop: false }` [INFO] [stderr] Checking miniz_oxide v0.8.0 [INFO] [stderr] Compiling syn v2.0.106 [INFO] [stderr] Checking flate2 v1.0.34 [INFO] [stderr] Checking tiff v0.9.1 [INFO] [stderr] Compiling fax_derive v0.2.0 [INFO] [stderr] Checking fax v0.2.6 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `self` [INFO] [stdout] --> src/lib.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Read}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter::Map` [INFO] [stdout] --> src/lib.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::iter::Map; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Bytes` and `self` [INFO] [stdout] --> src/decoder.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Bytes, Read}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `EDFB_HALF` [INFO] [stdout] --> src/decoder.rs:5:45 [INFO] [stdout] | [INFO] [stdout] 5 | use crate::maps::{Mode, black, white, mode, EDFB_HALF, EOL}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Read` [INFO] [stdout] --> src/lib.rs:2:21 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Read}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Read` [INFO] [stdout] --> src/decoder.rs:2:28 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Bytes, Read}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/decoder.rs:129:9 [INFO] [stdout] | [INFO] [stdout] 129 | for y in 0 .. height.unwrap_or(u16::MAX) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `xxx` [INFO] [stdout] --> src/decoder.rs:226:25 [INFO] [stdout] | [INFO] [stdout] 226 | let xxx = self.reader.peek(3).ok_or(DecodeError::Invalid)?; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_xxx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>, fn(u8) -> Result {Result::::Ok}>>, Infallible> [INFO] [stdout] --> src/lib.rs:163:5 [INFO] [stdout] | [INFO] [stdout] 163 | ByteReader::new(slice.iter().cloned().map(Ok)).unwrap() [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:13:17 [INFO] [stdout] | [INFO] [stdout] 13 | reader.consume(len); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 13 | let _ = reader.consume(len); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:19:17 [INFO] [stdout] | [INFO] [stdout] 19 | reader.consume(len); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 19 | let _ = reader.consume(len); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:27:25 [INFO] [stdout] | [INFO] [stdout] 27 | reader.consume(len); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 27 | let _ = reader.consume(len); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:31:25 [INFO] [stdout] | [INFO] [stdout] 31 | reader.consume(width); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 31 | let _ = reader.consume(width); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, fn(u8) -> Result {Result::::Ok}>>, Infallible> [INFO] [stdout] --> src/decoder.rs:127:23 [INFO] [stdout] | [INFO] [stdout] 127 | let mut decoder = Group4Decoder::new(reader, width).ok()?; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/decoder.rs:228:21 [INFO] [stdout] | [INFO] [stdout] 228 | self.reader.consume(3); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 228 | let _ = self.reader.consume(3); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/decoder.rs:252:17 [INFO] [stdout] | [INFO] [stdout] 252 | pub fn line(&self) -> Line { [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] 252 | pub fn line(&self) -> Line<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `self` [INFO] [stdout] --> src/lib.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Read}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter::Map` [INFO] [stdout] --> src/lib.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::iter::Map; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Bytes` and `self` [INFO] [stdout] --> src/decoder.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Bytes, Read}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `EDFB_HALF` [INFO] [stdout] --> src/decoder.rs:5:45 [INFO] [stdout] | [INFO] [stdout] 5 | use crate::maps::{Mode, black, white, mode, EDFB_HALF, EOL}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Read` [INFO] [stdout] --> src/lib.rs:2:21 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Read}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Read` [INFO] [stdout] --> src/decoder.rs:2:28 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{self, Bytes, Read}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/decoder.rs:129:9 [INFO] [stdout] | [INFO] [stdout] 129 | for y in 0 .. height.unwrap_or(u16::MAX) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `xxx` [INFO] [stdout] --> src/decoder.rs:226:25 [INFO] [stdout] | [INFO] [stdout] 226 | let xxx = self.reader.peek(3).ok_or(DecodeError::Invalid)?; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_xxx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>, fn(u8) -> Result {Result::::Ok}>>, Infallible> [INFO] [stdout] --> src/lib.rs:163:5 [INFO] [stdout] | [INFO] [stdout] 163 | ByteReader::new(slice.iter().cloned().map(Ok)).unwrap() [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:13:17 [INFO] [stdout] | [INFO] [stdout] 13 | reader.consume(len); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 13 | let _ = reader.consume(len); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:19:17 [INFO] [stdout] | [INFO] [stdout] 19 | reader.consume(len); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 19 | let _ = reader.consume(len); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:27:25 [INFO] [stdout] | [INFO] [stdout] 27 | reader.consume(len); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 27 | let _ = reader.consume(len); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/maps.rs:31:25 [INFO] [stdout] | [INFO] [stdout] 31 | reader.consume(width); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 31 | let _ = reader.consume(width); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, fn(u8) -> Result {Result::::Ok}>>, Infallible> [INFO] [stdout] --> src/decoder.rs:127:23 [INFO] [stdout] | [INFO] [stdout] 127 | let mut decoder = Group4Decoder::new(reader, width).ok()?; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/decoder.rs:228:21 [INFO] [stdout] | [INFO] [stdout] 228 | self.reader.consume(3); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 228 | let _ = self.reader.consume(3); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/decoder.rs:252:17 [INFO] [stdout] | [INFO] [stdout] 252 | pub fn line(&self) -> Line { [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] 252 | pub fn line(&self) -> Line<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `fax` (lib) due to 2 previous errors; 14 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `fax` (lib test) due to 2 previous errors; 14 warnings emitted [INFO] running `Command { std: "docker" "inspect" "046d9dd9f99435818ebfd1e2902edd7d662653bf5303608b7c058258a120db6b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "046d9dd9f99435818ebfd1e2902edd7d662653bf5303608b7c058258a120db6b", kill_on_drop: false }` [INFO] [stdout] 046d9dd9f99435818ebfd1e2902edd7d662653bf5303608b7c058258a120db6b