[INFO] cloning repository https://github.com/brenno263/rand-emoji
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brenno263/rand-emoji" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenno263%2Frand-emoji", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenno263%2Frand-emoji'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5bd9547bf28ab2f544ee91f3563e2033ae5b43ee
[INFO] building brenno263/rand-emoji against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenno263%2Frand-emoji" "/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/brenno263/rand-emoji on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brenno263/rand-emoji
[INFO] finished tweaking git repo https://github.com/brenno263/rand-emoji
[INFO] tweaked toml for git repo https://github.com/brenno263/rand-emoji written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/brenno263/rand-emoji 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48799901e5ecea0593f617f6cb88343872b8619de0588ae1f2352636f2407aa6
[INFO] running `Command { std: "docker" "start" "-a" "48799901e5ecea0593f617f6cb88343872b8619de0588ae1f2352636f2407aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48799901e5ecea0593f617f6cb88343872b8619de0588ae1f2352636f2407aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48799901e5ecea0593f617f6cb88343872b8619de0588ae1f2352636f2407aa6", kill_on_drop: false }`
[INFO] [stdout] 48799901e5ecea0593f617f6cb88343872b8619de0588ae1f2352636f2407aa6
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b14dfea800b44a1c30f3d3b465b2a0fdbabf54149f297a49d2648cc4eae54899
[INFO] running `Command { std: "docker" "start" "-a" "b14dfea800b44a1c30f3d3b465b2a0fdbabf54149f297a49d2648cc4eae54899", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rand-emoji v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `error::Error`, `iter`, and `self`
[INFO] [stdout]  --> src/main.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{env, error::Error, fs::{self, File}, io::{BufRead, BufReader}, iter, path::Path};
[INFO] [stdout]   |                ^^^^^^^^^^^^       ^^^^                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `character` is never read
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Emojichar {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 10 |     pub character: char,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RANGES` is never used
[INFO] [stdout]   --> src/main.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |         const RANGES: [(u32,u32); 1]= [
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EmojiIter` is never constructed
[INFO] [stdout]   --> src/main.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct EmojiIter<R> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | / impl<R> EmojiIter<R>
[INFO] [stdout] 49 | | where
[INFO] [stdout] 50 | |     R: Rng,
[INFO] [stdout]    | |___________- associated function in this implementation
[INFO] [stdout] 51 |   {
[INFO] [stdout] 52 |       pub fn new(rng: R) -> Self {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `KeycapSequence`, `FlagSequence`, and `ModifierSequence` are never constructed
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | enum EmojiType {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 80 |     Basic,
[INFO] [stdout] 81 |     KeycapSequence,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 82 |     FlagSequence,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 83 |     ModifierSequence,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EmojiType` 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: field `emoji_type` is never read
[INFO] [stdout]   --> src/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 88 | struct EmojiData {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 89 |     character_raw: u32,
[INFO] [stdout] 90 |     emoji_type: EmojiType,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EmojiData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.83s
[INFO] running `Command { std: "docker" "inspect" "b14dfea800b44a1c30f3d3b465b2a0fdbabf54149f297a49d2648cc4eae54899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b14dfea800b44a1c30f3d3b465b2a0fdbabf54149f297a49d2648cc4eae54899", kill_on_drop: false }`
[INFO] [stdout] b14dfea800b44a1c30f3d3b465b2a0fdbabf54149f297a49d2648cc4eae54899
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e3edd4215829119bb80a0d3de5f230f0d745a889259c1ff43be1d091f214dc8
[INFO] running `Command { std: "docker" "start" "-a" "2e3edd4215829119bb80a0d3de5f230f0d745a889259c1ff43be1d091f214dc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand-emoji v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `error::Error`, `iter`, and `self`
[INFO] [stdout]  --> src/main.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{env, error::Error, fs::{self, File}, io::{BufRead, BufReader}, iter, path::Path};
[INFO] [stdout]   |                ^^^^^^^^^^^^       ^^^^                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `character` is never read
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Emojichar {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 10 |     pub character: char,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RANGES` is never used
[INFO] [stdout]   --> src/main.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |         const RANGES: [(u32,u32); 1]= [
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EmojiIter` is never constructed
[INFO] [stdout]   --> src/main.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct EmojiIter<R> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | / impl<R> EmojiIter<R>
[INFO] [stdout] 49 | | where
[INFO] [stdout] 50 | |     R: Rng,
[INFO] [stdout]    | |___________- associated function in this implementation
[INFO] [stdout] 51 |   {
[INFO] [stdout] 52 |       pub fn new(rng: R) -> Self {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `KeycapSequence`, `FlagSequence`, and `ModifierSequence` are never constructed
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | enum EmojiType {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 80 |     Basic,
[INFO] [stdout] 81 |     KeycapSequence,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 82 |     FlagSequence,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 83 |     ModifierSequence,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EmojiType` 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: field `emoji_type` is never read
[INFO] [stdout]   --> src/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 88 | struct EmojiData {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 89 |     character_raw: u32,
[INFO] [stdout] 90 |     emoji_type: EmojiType,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EmojiData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "2e3edd4215829119bb80a0d3de5f230f0d745a889259c1ff43be1d091f214dc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e3edd4215829119bb80a0d3de5f230f0d745a889259c1ff43be1d091f214dc8", kill_on_drop: false }`
[INFO] [stdout] 2e3edd4215829119bb80a0d3de5f230f0d745a889259c1ff43be1d091f214dc8