[INFO] fetching crate echolot 0.1.1...
[INFO] checking echolot-0.1.1 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate echolot 0.1.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate echolot 0.1.1 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate echolot 0.1.1
[INFO] finished tweaking crates.io crate echolot 0.1.1
[INFO] tweaked toml for crates.io crate echolot 0.1.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate echolot 0.1.1 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 764a5997a6cf45d97cecfa17514ebbb7dd349c2e6636b7574003e94e3d20d188
[INFO] running `Command { std: "docker" "start" "-a" "764a5997a6cf45d97cecfa17514ebbb7dd349c2e6636b7574003e94e3d20d188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "764a5997a6cf45d97cecfa17514ebbb7dd349c2e6636b7574003e94e3d20d188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "764a5997a6cf45d97cecfa17514ebbb7dd349c2e6636b7574003e94e3d20d188", kill_on_drop: false }`
[INFO] [stdout] 764a5997a6cf45d97cecfa17514ebbb7dd349c2e6636b7574003e94e3d20d188
[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 -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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 401f20b830f4f2620e1cbe7338fe895d0b2ca151180c784be362ff76a16bbaee
[INFO] running `Command { std: "docker" "start" "-a" "401f20b830f4f2620e1cbe7338fe895d0b2ca151180c784be362ff76a16bbaee", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking strength_reduce v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]    Compiling cpal v0.13.5
[INFO] [stderr]     Checking rsor v0.1.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking num-complex v0.4.1
[INFO] [stderr]     Checking numeric-array v0.5.2
[INFO] [stderr]     Checking transpose v0.2.1
[INFO] [stderr]     Checking primal-check v0.3.1
[INFO] [stderr]     Checking rustfft v6.0.1
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking parking_lot_core v0.8.5
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling duplicate v0.4.0
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking alsa v0.6.0
[INFO] [stderr]     Checking fundsp v0.6.3
[INFO] [stderr]     Checking echolot v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/transmit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `base64::encode as encode_base64`
[INFO] [stdout]  --> src/transmit.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use base64::encode as encode_base64;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs::File`
[INFO] [stdout]  --> src/receive.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fs::File, sync::mpsc};
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/receive.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `base64::decode as decode_base64`
[INFO] [stdout]  --> src/receive.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use base64::decode as decode_base64;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/transmit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `base64::encode as encode_base64`
[INFO] [stdout]  --> src/transmit.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use base64::encode as encode_base64;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs::File`
[INFO] [stdout]  --> src/receive.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fs::File, sync::mpsc};
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/receive.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `base64::decode as decode_base64`
[INFO] [stdout]  --> src/receive.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use base64::decode as decode_base64;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]   --> src/coding.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn decode(transmission: Vec<f32>, sample_rate: u32) -> anyhow::Result<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `freq_to_base64` is never used
[INFO] [stdout]   --> src/coding.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn freq_to_base64(freq: f32) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `base64_value_to_base64_char` is never used
[INFO] [stdout]   --> src/coding.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn base64_value_to_base64_char(n: u8) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `i16_to_f32` is never used
[INFO] [stdout]  --> src/receive/util.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn i16_to_f32(sample: &[i16]) -> Vec<f32> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `u16_to_f32` is never used
[INFO] [stdout]   --> src/receive/util.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn u16_to_f32(sample: &[u16]) -> Vec<f32> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]   --> src/coding.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn decode(transmission: Vec<f32>, sample_rate: u32) -> anyhow::Result<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `freq_to_base64` is never used
[INFO] [stdout]   --> src/coding.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn freq_to_base64(freq: f32) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `base64_value_to_base64_char` is never used
[INFO] [stdout]   --> src/coding.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn base64_value_to_base64_char(n: u8) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `i16_to_f32` is never used
[INFO] [stdout]  --> src/receive/util.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn i16_to_f32(sample: &[i16]) -> Vec<f32> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `u16_to_f32` is never used
[INFO] [stdout]   --> src/receive/util.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn u16_to_f32(sample: &[u16]) -> Vec<f32> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.79s
[INFO] running `Command { std: "docker" "inspect" "401f20b830f4f2620e1cbe7338fe895d0b2ca151180c784be362ff76a16bbaee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "401f20b830f4f2620e1cbe7338fe895d0b2ca151180c784be362ff76a16bbaee", kill_on_drop: false }`
[INFO] [stdout] 401f20b830f4f2620e1cbe7338fe895d0b2ca151180c784be362ff76a16bbaee