[INFO] cloning repository https://github.com/caspianmerlin/png_me [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caspianmerlin/png_me" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspianmerlin%2Fpng_me", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspianmerlin%2Fpng_me'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 7a87432979a24176ef6d630941596e01ac7d3b25 [INFO] checking caspianmerlin/png_me against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspianmerlin%2Fpng_me" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/caspianmerlin/png_me on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/caspianmerlin/png_me [INFO] finished tweaking git repo https://github.com/caspianmerlin/png_me [INFO] tweaked toml for git repo https://github.com/caspianmerlin/png_me written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/caspianmerlin/png_me 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded crc-catalog v1.1.1 [INFO] [stderr] Downloaded crc v2.1.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 112018fe0124c347f20b410f26ec5890155dcaaed53a245213e316be1dfd2376 [INFO] running `Command { std: "docker" "start" "-a" "112018fe0124c347f20b410f26ec5890155dcaaed53a245213e316be1dfd2376", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "112018fe0124c347f20b410f26ec5890155dcaaed53a245213e316be1dfd2376", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "112018fe0124c347f20b410f26ec5890155dcaaed53a245213e316be1dfd2376", kill_on_drop: false }` [INFO] [stdout] 112018fe0124c347f20b410f26ec5890155dcaaed53a245213e316be1dfd2376 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 596f4667a048f31db896ac1c120feb90b738fad9c4327f72acbd78e77f09fb8e [INFO] running `Command { std: "docker" "start" "-a" "596f4667a048f31db896ac1c120feb90b738fad9c4327f72acbd78e77f09fb8e", kill_on_drop: false }` [INFO] [stderr] Checking crc-catalog v1.1.1 [INFO] [stderr] Checking crc v2.1.0 [INFO] [stderr] Checking png_me v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `Error` [INFO] [stdout] --> src/args.rs:2:13 [INFO] [stdout] | [INFO] [stdout] 2 | use crate::{Error, Result}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `error::Error` [INFO] [stdout] --> src/chunk.rs:1:21 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{io::Read, error::Error, fmt::{Display, Formatter}}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `process::Command` [INFO] [stdout] --> src/commands.rs:1:144 [INFO] [stdout] | [INFO] [stdout] 1 | ...ader, Read, Write}, fs::{File, OpenOptions}, str::FromStr, process::Command}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Error` [INFO] [stdout] --> src/args.rs:2:13 [INFO] [stdout] | [INFO] [stdout] 2 | use crate::{Error, Result}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `error::Error` [INFO] [stdout] --> src/chunk.rs:1:21 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{io::Read, error::Error, fmt::{Display, Formatter}}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `ChunkType` is imported redundantly [INFO] [stdout] --> src/chunk.rs:102:9 [INFO] [stdout] | [INFO] [stdout] 101 | use super::*; [INFO] [stdout] | -------- the item `ChunkType` is already imported here [INFO] [stdout] 102 | use crate::chunk_type::ChunkType; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryFrom` is imported redundantly [INFO] [stdout] --> src/chunk_type.rs:78:9 [INFO] [stdout] | [INFO] [stdout] 78 | use std::convert::TryFrom; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryFrom` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `FromStr` is imported redundantly [INFO] [stdout] --> src/chunk_type.rs:79:9 [INFO] [stdout] | [INFO] [stdout] 77 | use super::*; [INFO] [stdout] | -------- the item `FromStr` is already imported here [INFO] [stdout] 78 | use std::convert::TryFrom; [INFO] [stdout] 79 | use std::str::FromStr; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `process::Command` [INFO] [stdout] --> src/commands.rs:1:144 [INFO] [stdout] | [INFO] [stdout] 1 | ...ader, Read, Write}, fs::{File, OpenOptions}, str::FromStr, process::Command}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Chunk` is imported redundantly [INFO] [stdout] --> src/png.rs:132:9 [INFO] [stdout] | [INFO] [stdout] 130 | use super::*; [INFO] [stdout] | -------- the item `Chunk` is already imported here [INFO] [stdout] 131 | use crate::chunk_type::ChunkType; [INFO] [stdout] 132 | use crate::chunk::Chunk; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryFrom` is imported redundantly [INFO] [stdout] --> src/png.rs:134:9 [INFO] [stdout] | [INFO] [stdout] 134 | use std::convert::TryFrom; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryFrom` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `FromStr` is imported redundantly [INFO] [stdout] --> src/png.rs:152:13 [INFO] [stdout] | [INFO] [stdout] 133 | use std::str::FromStr; [INFO] [stdout] | ----------------- the item `FromStr` is already imported here [INFO] [stdout] ... [INFO] [stdout] 152 | use std::str::FromStr; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/commands.rs:63:5 [INFO] [stdout] | [INFO] [stdout] 31 | / match command_args { [INFO] [stdout] 32 | | PngMeArgs::Encode(args) => { [INFO] [stdout] 33 | | return match encode(args) { [INFO] [stdout] 34 | | Ok(_) => Ok(()), [INFO] [stdout] ... | [INFO] [stdout] 61 | | } [INFO] [stdout] 62 | | }; [INFO] [stdout] | |_____- any code following this `match` expression is unreachable, as all arms diverge [INFO] [stdout] 63 | Ok(()) [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `io::Read` [INFO] [stdout] --> src/chunk.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{io::Read, error::Error, fmt::{Display, Formatter}}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `is_valid`, `is_critical`, `is_public`, `is_reserved_bit_valid`, and `is_safe_to_copy` are never used [INFO] [stdout] --> src/chunk_type.rs:12:12 [INFO] [stdout] | [INFO] [stdout] 8 | impl ChunkType { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 12 | pub fn is_valid(&self) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 23 | pub fn is_critical(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 26 | pub fn is_public(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 29 | pub fn is_reserved_bit_valid(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 32 | pub fn is_safe_to_copy(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `SyntaxError` and `OtherError` are never constructed [INFO] [stdout] --> src/commands.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 7 | pub enum CommandError { [INFO] [stdout] | ------------ variants in this enum [INFO] [stdout] 8 | SyntaxError, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 13 | OtherError, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `CommandError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `header` is never used [INFO] [stdout] --> src/png.rs:36:12 [INFO] [stdout] | [INFO] [stdout] 10 | impl Png { [INFO] [stdout] | -------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 36 | pub fn header(&self) -> &[u8; 8] { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/commands.rs:146:5 [INFO] [stdout] | [INFO] [stdout] 146 | reader.read_to_end(&mut buffer); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 146 | let _ = reader.read_to_end(&mut buffer); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/commands.rs:63:5 [INFO] [stdout] | [INFO] [stdout] 31 | / match command_args { [INFO] [stdout] 32 | | PngMeArgs::Encode(args) => { [INFO] [stdout] 33 | | return match encode(args) { [INFO] [stdout] 34 | | Ok(_) => Ok(()), [INFO] [stdout] ... | [INFO] [stdout] 61 | | } [INFO] [stdout] 62 | | }; [INFO] [stdout] | |_____- any code following this `match` expression is unreachable, as all arms diverge [INFO] [stdout] 63 | Ok(()) [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `io::Read` [INFO] [stdout] --> src/chunk.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{io::Read, error::Error, fmt::{Display, Formatter}}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::str::FromStr` [INFO] [stdout] --> src/png.rs:133:9 [INFO] [stdout] | [INFO] [stdout] 133 | use std::str::FromStr; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `SyntaxError` and `OtherError` are never constructed [INFO] [stdout] --> src/commands.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 7 | pub enum CommandError { [INFO] [stdout] | ------------ variants in this enum [INFO] [stdout] 8 | SyntaxError, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 13 | OtherError, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `CommandError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `header` is never used [INFO] [stdout] --> src/png.rs:36:12 [INFO] [stdout] | [INFO] [stdout] 10 | impl Png { [INFO] [stdout] | -------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 36 | pub fn header(&self) -> &[u8; 8] { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/commands.rs:146:5 [INFO] [stdout] | [INFO] [stdout] 146 | reader.read_to_end(&mut buffer); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 146 | let _ = reader.read_to_end(&mut buffer); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 15 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s [INFO] running `Command { std: "docker" "inspect" "596f4667a048f31db896ac1c120feb90b738fad9c4327f72acbd78e77f09fb8e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "596f4667a048f31db896ac1c120feb90b738fad9c4327f72acbd78e77f09fb8e", kill_on_drop: false }` [INFO] [stdout] 596f4667a048f31db896ac1c120feb90b738fad9c4327f72acbd78e77f09fb8e