[INFO] cloning repository https://github.com/KeenS/pattern-match-compile
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KeenS/pattern-match-compile" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeenS%2Fpattern-match-compile", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeenS%2Fpattern-match-compile'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fca6481b02c31c2507bda25e10949482e4384a2f
[INFO] checking KeenS/pattern-match-compile against try#a3a874232ae0a7586b5fbe7483c5a42e157bd62a for pr-151109
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeenS%2Fpattern-match-compile" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/KeenS/pattern-match-compile
[INFO] finished tweaking git repo https://github.com/KeenS/pattern-match-compile
[INFO] tweaked toml for git repo https://github.com/KeenS/pattern-match-compile written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/KeenS/pattern-match-compile on toolchain a3a874232ae0a7586b5fbe7483c5a42e157bd62a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3a874232ae0a7586b5fbe7483c5a42e157bd62a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/KeenS/pattern-match-compile 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" "+a3a874232ae0a7586b5fbe7483c5a42e157bd62a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a3a874232ae0a7586b5fbe7483c5a42e157bd62a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d5546475b7a1d2bb9271708068a517b9d49972bd197151137997f6ebc942fad
[INFO] running `Command { std: "docker" "start" "-a" "8d5546475b7a1d2bb9271708068a517b9d49972bd197151137997f6ebc942fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d5546475b7a1d2bb9271708068a517b9d49972bd197151137997f6ebc942fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d5546475b7a1d2bb9271708068a517b9d49972bd197151137997f6ebc942fad", kill_on_drop: false }`
[INFO] [stdout] 8d5546475b7a1d2bb9271708068a517b9d49972bd197151137997f6ebc942fad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a3a874232ae0a7586b5fbe7483c5a42e157bd62a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d212c5d5b897086021b3a47d51c614be2b46971e1de9ab0a769e35a302adfc2
[INFO] running `Command { std: "docker" "start" "-a" "9d212c5d5b897086021b3a47d51c614be2b46971e1de9ab0a769e35a302adfc2", kill_on_drop: false }`
[INFO] [stderr]     Checking pattern-match-compile v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]     --> src/main.rs:1436:9
[INFO] [stdout]      |
[INFO] [stdout] 1436 |     let m = {
[INFO] [stdout]      |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m3`
[INFO] [stdout]     --> src/main.rs:1578:9
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     let m3 = {
[INFO] [stdout]      |         ^^ help: if this is intentional, prefix it with an underscore: `_m3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Symbol` is never constructed
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub enum Expr {
[INFO] [stdout]    |              ---- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 63 |         Symbol(Symbol),
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/pp.rs:57:30
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 57 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 57 +                     while let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 57 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 57 +                     if let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:100:30
[INFO] [stdout]     |
[INFO] [stdout] 100 |                     for d in value.as_ref().map(|d| &**d) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 100 -                     for d in value.as_ref().map(|d| &**d) {
[INFO] [stdout] 100 +                     while let Some(d) = value.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 100 -                     for d in value.as_ref().map(|d| &**d) {
[INFO] [stdout] 100 +                     if let Some(d) = value.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     for p in pattern.as_ref().map(|p| &**p) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 127 -                     for p in pattern.as_ref().map(|p| &**p) {
[INFO] [stdout] 127 +                     while let Some(p) = pattern.as_ref().map(|p| &**p) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 127 -                     for p in pattern.as_ref().map(|p| &**p) {
[INFO] [stdout] 127 +                     if let Some(p) = pattern.as_ref().map(|p| &**p) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:165:30
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 165 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 165 +                     while let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 165 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 165 +                     if let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:219:30
[INFO] [stdout]     |
[INFO] [stdout] 219 |                     for s in data {
[INFO] [stdout]     |                              ^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 219 -                     for s in data {
[INFO] [stdout] 219 +                     while let Some(s) = data {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 219 -                     for s in data {
[INFO] [stdout] 219 +                     if let Some(s) = data {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]     --> src/main.rs:1436:9
[INFO] [stdout]      |
[INFO] [stdout] 1436 |     let m = {
[INFO] [stdout]      |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m3`
[INFO] [stdout]     --> src/main.rs:1578:9
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     let m3 = {
[INFO] [stdout]      |         ^^ help: if this is intentional, prefix it with an underscore: `_m3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `consv` is never used
[INFO] [stdout]     --> src/main.rs:1589:12
[INFO] [stdout]      |
[INFO] [stdout] 1589 |         fn consv(arg: Expr) -> Expr {
[INFO] [stdout]      |            ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Symbol` is never constructed
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub enum Expr {
[INFO] [stdout]    |              ---- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 63 |         Symbol(Symbol),
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` 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: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/pp.rs:57:30
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 57 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 57 +                     while let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 57 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 57 +                     if let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:100:30
[INFO] [stdout]     |
[INFO] [stdout] 100 |                     for d in value.as_ref().map(|d| &**d) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 100 -                     for d in value.as_ref().map(|d| &**d) {
[INFO] [stdout] 100 +                     while let Some(d) = value.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 100 -                     for d in value.as_ref().map(|d| &**d) {
[INFO] [stdout] 100 +                     if let Some(d) = value.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     for p in pattern.as_ref().map(|p| &**p) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 127 -                     for p in pattern.as_ref().map(|p| &**p) {
[INFO] [stdout] 127 +                     while let Some(p) = pattern.as_ref().map(|p| &**p) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 127 -                     for p in pattern.as_ref().map(|p| &**p) {
[INFO] [stdout] 127 +                     if let Some(p) = pattern.as_ref().map(|p| &**p) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:165:30
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 165 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 165 +                     while let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 165 -                     for d in data.as_ref().map(|d| &**d) {
[INFO] [stdout] 165 +                     if let Some(d) = data.as_ref().map(|d| &**d) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/pp.rs:219:30
[INFO] [stdout]     |
[INFO] [stdout] 219 |                     for s in data {
[INFO] [stdout]     |                              ^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 219 -                     for s in data {
[INFO] [stdout] 219 +                     while let Some(s) = data {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 219 -                     for s in data {
[INFO] [stdout] 219 +                     if let Some(s) = data {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "9d212c5d5b897086021b3a47d51c614be2b46971e1de9ab0a769e35a302adfc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d212c5d5b897086021b3a47d51c614be2b46971e1de9ab0a769e35a302adfc2", kill_on_drop: false }`
[INFO] [stdout] 9d212c5d5b897086021b3a47d51c614be2b46971e1de9ab0a769e35a302adfc2
