[INFO] cloning repository https://github.com/Kylebrown9/Slang
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kylebrown9/Slang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKylebrown9%2FSlang"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKylebrown9%2FSlang'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dd446e019b457da64bd383db3ea2f9df2b0ee1cd
[INFO] checking Kylebrown9/Slang against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKylebrown9%2FSlang" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Kylebrown9/Slang on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Kylebrown9/Slang
[INFO] finished tweaking git repo https://github.com/Kylebrown9/Slang
[INFO] tweaked toml for git repo https://github.com/Kylebrown9/Slang written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Kylebrown9/Slang already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0475518b2303cc8b6239e2d06f80e1bfe33935bffff779201402566b8b812a7d
[INFO] running `"docker" "start" "-a" "0475518b2303cc8b6239e2d06f80e1bfe33935bffff779201402566b8b812a7d"`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking slang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/io_helpers.rs:22:19
[INFO] [stderr]    |
[INFO] [stderr] 22 |     contents: Box<Write>
[INFO] [stderr]    |                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/io_helpers.rs:33:36
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn simplify_output(writer: Box<Write>) -> SimpleOutput {
[INFO] [stderr]    |                                    ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:73:25
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let out_stream: Box<Write> = match task.out_file {
[INFO] [stderr]    |                         ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/io_helpers.rs:22:19
[INFO] [stderr]    |
[INFO] [stderr] 22 |     contents: Box<Write>
[INFO] [stderr]    |                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/io_helpers.rs:33:36
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn simplify_output(writer: Box<Write>) -> SimpleOutput {
[INFO] [stderr]    |                                    ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:73:25
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let out_stream: Box<Write> = match task.out_file {
[INFO] [stderr]    |                         ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `map`
[INFO] [stderr]    --> src/trie/hash.rs:165:44
[INFO] [stderr]     |
[INFO] [stderr] 165 |                 trie: HashTrie::Standard { map, .. }, 
[INFO] [stderr]     |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `next_id`
[INFO] [stderr]    --> src/trie/hash.rs:320:49
[INFO] [stderr]     |
[INFO] [stderr] 320 |                 trie: HashTrie::Standard { map, next_id }, 
[INFO] [stderr]     |                                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tokens`
[INFO] [stderr]   --> src/macro_def.rs:52:35
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn read_macros(&mut self, tokens: &[Token]) {
[INFO] [stderr]    |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tokens`
[INFO] [stderr]   --> src/macro_def.rs:56:30
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn read_macro(&mut self, tokens: &[Token]) {
[INFO] [stderr]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `trie_root`
[INFO] [stderr]   --> src/macro_def.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let trie_root = self.contents.as_view();
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_trie_root`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remaining`
[INFO] [stderr]   --> src/macro_def.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let mut remaining = input;
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remaining`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `out_stream`
[INFO] [stderr]   --> src/macro_def.rs:60:50
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn expand_tokens(&self, input: &[Token], out_stream: &mut SimpleOutput) -> Result<()> {
[INFO] [stderr]    |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_out_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/trie/hash.rs:346:13
[INFO] [stderr]     |
[INFO] [stderr] 346 |         let mut next_edge;
[INFO] [stderr]     |             ----^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/macro_def.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let mut remaining = input;
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/macro_def.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Var,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Token`
[INFO] [stderr]   --> src/macro_def.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     Token {
[INFO] [stderr] 18 | |         value: String
[INFO] [stderr] 19 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BlockVar`
[INFO] [stderr]   --> src/macro_def.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | /     BlockVar {
[INFO] [stderr] 22 | |         block_delim: BlockDelimiter
[INFO] [stderr] 23 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SquareBracket`
[INFO] [stderr]   --> src/macro_def.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     SquareBracket,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CurlyBracket`
[INFO] [stderr]   --> src/macro_def.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     CurlyBracket,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Parenthesis`
[INFO] [stderr]   --> src/macro_def.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Parenthesis
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Text`
[INFO] [stderr]   --> src/macro_def.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | /     Text {
[INFO] [stderr] 38 | |         data: String
[INFO] [stderr] 39 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/macro_def.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | /     Var {
[INFO] [stderr] 41 | |         index: u8
[INFO] [stderr] 42 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_macro`
[INFO] [stderr]   --> src/macro_def.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn read_macro(&mut self, tokens: &[Token]) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `contents`
[INFO] [stderr]   --> src/io_helpers.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     contents: Box<Write>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write`
[INFO] [stderr]   --> src/io_helpers.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn write(&mut self, val: &str) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `map`
[INFO] [stderr]    --> src/trie/hash.rs:165:44
[INFO] [stderr]     |
[INFO] [stderr] 165 |                 trie: HashTrie::Standard { map, .. }, 
[INFO] [stderr]     |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `next_id`
[INFO] [stderr]    --> src/trie/hash.rs:320:49
[INFO] [stderr]     |
[INFO] [stderr] 320 |                 trie: HashTrie::Standard { map, next_id }, 
[INFO] [stderr]     |                                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tokens`
[INFO] [stderr]   --> src/macro_def.rs:52:35
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn read_macros(&mut self, tokens: &[Token]) {
[INFO] [stderr]    |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tokens`
[INFO] [stderr]   --> src/macro_def.rs:56:30
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn read_macro(&mut self, tokens: &[Token]) {
[INFO] [stderr]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `trie_root`
[INFO] [stderr]   --> src/macro_def.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let trie_root = self.contents.as_view();
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_trie_root`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remaining`
[INFO] [stderr]   --> src/macro_def.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let mut remaining = input;
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remaining`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `out_stream`
[INFO] [stderr]   --> src/macro_def.rs:60:50
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn expand_tokens(&self, input: &[Token], out_stream: &mut SimpleOutput) -> Result<()> {
[INFO] [stderr]    |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_out_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/trie/hash.rs:346:13
[INFO] [stderr]     |
[INFO] [stderr] 346 |         let mut next_edge;
[INFO] [stderr]     |             ----^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/macro_def.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let mut remaining = input;
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/macro_def.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Var,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Token`
[INFO] [stderr]   --> src/macro_def.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     Token {
[INFO] [stderr] 18 | |         value: String
[INFO] [stderr] 19 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BlockVar`
[INFO] [stderr]   --> src/macro_def.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | /     BlockVar {
[INFO] [stderr] 22 | |         block_delim: BlockDelimiter
[INFO] [stderr] 23 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SquareBracket`
[INFO] [stderr]   --> src/macro_def.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     SquareBracket,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CurlyBracket`
[INFO] [stderr]   --> src/macro_def.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     CurlyBracket,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Parenthesis`
[INFO] [stderr]   --> src/macro_def.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Parenthesis
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Text`
[INFO] [stderr]   --> src/macro_def.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | /     Text {
[INFO] [stderr] 38 | |         data: String
[INFO] [stderr] 39 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/macro_def.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | /     Var {
[INFO] [stderr] 41 | |         index: u8
[INFO] [stderr] 42 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_macro`
[INFO] [stderr]   --> src/macro_def.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn read_macro(&mut self, tokens: &[Token]) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `contents`
[INFO] [stderr]   --> src/io_helpers.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     contents: Box<Write>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write`
[INFO] [stderr]   --> src/io_helpers.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn write(&mut self, val: &str) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `"docker" "inspect" "0475518b2303cc8b6239e2d06f80e1bfe33935bffff779201402566b8b812a7d"`
[INFO] running `"docker" "rm" "-f" "0475518b2303cc8b6239e2d06f80e1bfe33935bffff779201402566b8b812a7d"`
[INFO] [stdout] 0475518b2303cc8b6239e2d06f80e1bfe33935bffff779201402566b8b812a7d