[INFO] fetching crate indexed_string 0.1.0...
[INFO] testing indexed_string-0.1.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate indexed_string 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate indexed_string 0.1.0
[INFO] finished tweaking crates.io crate indexed_string 0.1.0
[INFO] tweaked toml for crates.io crate indexed_string 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate indexed_string 0.1.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] feaa6e308d5e390b0c9af8ac76d4cb89a4cd4630c9d0603493245a61dcaf21b0
[INFO] running `Command { std: "docker" "start" "-a" "feaa6e308d5e390b0c9af8ac76d4cb89a4cd4630c9d0603493245a61dcaf21b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "feaa6e308d5e390b0c9af8ac76d4cb89a4cd4630c9d0603493245a61dcaf21b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feaa6e308d5e390b0c9af8ac76d4cb89a4cd4630c9d0603493245a61dcaf21b0", kill_on_drop: false }`
[INFO] [stdout] feaa6e308d5e390b0c9af8ac76d4cb89a4cd4630c9d0603493245a61dcaf21b0
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 883591c67650a6c5c7347f73e7a22bf5dd56704bfacd9cb6355d2f85a7adc809
[INFO] running `Command { std: "docker" "start" "-a" "883591c67650a6c5c7347f73e7a22bf5dd56704bfacd9cb6355d2f85a7adc809", kill_on_drop: false }`
[INFO] [stderr]    Compiling indexed_string v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let mut character_len: u8;
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut extra_variation_selector: Option<[u8; 3]>;
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:173:13
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let mut raw_len: u8;
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `utf8_char` is never used
[INFO] [stdout]   --> src/indexing.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl StringIndex {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn utf8_char(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `string` is never used
[INFO] [stdout]   --> src/indexed_string.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl IndexedString {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 19 |     fn string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "883591c67650a6c5c7347f73e7a22bf5dd56704bfacd9cb6355d2f85a7adc809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "883591c67650a6c5c7347f73e7a22bf5dd56704bfacd9cb6355d2f85a7adc809", kill_on_drop: false }`
[INFO] [stdout] 883591c67650a6c5c7347f73e7a22bf5dd56704bfacd9cb6355d2f85a7adc809
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b84560638cc5de0e35e439bcbf96983e298088845c62e8a059f5dc0fdb275182
[INFO] running `Command { std: "docker" "start" "-a" "b84560638cc5de0e35e439bcbf96983e298088845c62e8a059f5dc0fdb275182", kill_on_drop: false }`
[INFO] [stderr]    Compiling indexed_string v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let mut character_len: u8;
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut extra_variation_selector: Option<[u8; 3]>;
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:173:13
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let mut raw_len: u8;
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `utf8_char` is never used
[INFO] [stdout]   --> src/indexing.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl StringIndex {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn utf8_char(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `string` is never used
[INFO] [stdout]   --> src/indexed_string.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl IndexedString {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 19 |     fn string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let mut character_len: u8;
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut extra_variation_selector: Option<[u8; 3]>;
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/indexing.rs:173:13
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let mut raw_len: u8;
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `string` is never used
[INFO] [stdout]   --> src/indexed_string.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl IndexedString {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 19 |     fn string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "b84560638cc5de0e35e439bcbf96983e298088845c62e8a059f5dc0fdb275182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b84560638cc5de0e35e439bcbf96983e298088845c62e8a059f5dc0fdb275182", kill_on_drop: false }`
[INFO] [stdout] b84560638cc5de0e35e439bcbf96983e298088845c62e8a059f5dc0fdb275182
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b363d3f4d4b7510dab2c083fd64b8d59d21208641c5caebfdb2a3d7ca03cbeb6
[INFO] running `Command { std: "docker" "start" "-a" "b363d3f4d4b7510dab2c083fd64b8d59d21208641c5caebfdb2a3d7ca03cbeb6", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/indexing.rs:171:13
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let mut character_len: u8;
[INFO] [stderr]     |             ----^^^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/indexing.rs:172:13
[INFO] [stderr]     |
[INFO] [stderr] 172 |         let mut extra_variation_selector: Option<[u8; 3]>;
[INFO] [stderr]     |             ----^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/indexing.rs:173:13
[INFO] [stderr]     |
[INFO] [stderr] 173 |         let mut raw_len: u8;
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method `utf8_char` is never used
[INFO] [stderr]   --> src/indexing.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl StringIndex {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 52 |     pub fn utf8_char(&self) -> String {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `string` is never used
[INFO] [stderr]   --> src/indexed_string.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl IndexedString {
[INFO] [stderr]    | ------------------ method in this implementation
[INFO] [stderr] 19 |     fn string(&self) -> String {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `indexed_string` (lib) generated 5 warnings (run `cargo fix --lib -p indexed_string` to apply 3 suggestions)
[INFO] [stderr] warning: method `string` is never used
[INFO] [stderr]   --> src/indexed_string.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl IndexedString {
[INFO] [stderr]    | ------------------ method in this implementation
[INFO] [stderr] 19 |     fn string(&self) -> String {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `indexed_string` (lib test) generated 4 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/indexed_string-7f1a6f2c7fa095d1)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test indexed_string_test::create_indexed_string ... ok
[INFO] [stdout] test indexed_string_test::iterator_over_indexed_string ... ok
[INFO] [stdout] test indexed_string_test::mutating_index_string ... ok
[INFO] [stdout] test indexing_test::test_null_string ... ok
[INFO] [stdout] test indexed_string_test::access_indexed_string ... ok
[INFO] [stdout] test indexing_test::test_unicode_index ... ok
[INFO] [stdout] test indexing_test::test_unicode_string ... ok
[INFO] [stdout] test indexed_string_test::create_indexed_string_with_unicode ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests indexed_string
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b363d3f4d4b7510dab2c083fd64b8d59d21208641c5caebfdb2a3d7ca03cbeb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b363d3f4d4b7510dab2c083fd64b8d59d21208641c5caebfdb2a3d7ca03cbeb6", kill_on_drop: false }`
[INFO] [stdout] b363d3f4d4b7510dab2c083fd64b8d59d21208641c5caebfdb2a3d7ca03cbeb6
