[INFO] fetching crate expresso 0.2.5...
[INFO] testing expresso-0.2.5 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate expresso 0.2.5 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate expresso 0.2.5
[INFO] finished tweaking crates.io crate expresso 0.2.5
[INFO] tweaked toml for crates.io crate expresso 0.2.5 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate expresso 0.2.5 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] crate crates.io crate expresso 0.2.5 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 6e828a58582d93bfbfa449d4d588bb03693e315e80525680f4870ebf3e1e549d
[INFO] running `Command { std: "docker" "start" "-a" "6e828a58582d93bfbfa449d4d588bb03693e315e80525680f4870ebf3e1e549d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e828a58582d93bfbfa449d4d588bb03693e315e80525680f4870ebf3e1e549d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e828a58582d93bfbfa449d4d588bb03693e315e80525680f4870ebf3e1e549d", kill_on_drop: false }`
[INFO] [stdout] 6e828a58582d93bfbfa449d4d588bb03693e315e80525680f4870ebf3e1e549d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0aafbbe37d4ac81b8f937f9eb4e4e1aea4233884145dbfc562160fb97c5936ab
[INFO] running `Command { std: "docker" "start" "-a" "0aafbbe37d4ac81b8f937f9eb4e4e1aea4233884145dbfc562160fb97c5936ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling anyhow v1.0.55
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling serde_yaml v0.8.23
[INFO] [stderr]    Compiling expresso v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::tokenizer::Token`
[INFO] [stdout]  --> src/expression.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::tokenizer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::variable_storage::VariableStorage`
[INFO] [stdout]  --> src/expression.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::variable_storage::VariableStorage;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OPERATORS`
[INFO] [stdout]  --> src/instructions.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::operator::{Operator,OPERATORS};
[INFO] [stdout]   |                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tokenizer::Token`
[INFO] [stdout]  --> src/variable_stack.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::tokenizer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/variable_storage.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tokenizer.rs:298:18
[INFO] [stdout]     |
[INFO] [stdout] 298 |     pub fn scanner( &self ) -> &'a Scanner {
[INFO] [stdout]     |                     ^^^^^          ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 298 |     pub fn scanner( &self ) -> &'a Scanner<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/variable_storage.rs:51:15
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter< String, Variable > {
[INFO] [stdout]    |                  ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter<'_,  String, Variable > {
[INFO] [stdout]    |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/variable_storage.rs:55:16
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys< String, Variable > {
[INFO] [stdout]    |                   ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys<'_,  String, Variable > {
[INFO] [stdout]    |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `expresso::variable_storage::VariableStorage`
[INFO] [stdout]  --> src/expresso_main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use expresso::variable_storage::VariableStorage;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/expresso_main.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 72 |                         todo!("setVar( {:?}, {:?} )", n, v );
[INFO] [stdout]    |                         ------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 73 |                         false
[INFO] [stdout]    |                         ^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/expresso_main.rs:37:3
[INFO] [stdout]    |
[INFO] [stdout] 37 |         machine.load_variable_storage( variable_filename );
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let _ = machine.load_variable_storage( variable_filename );
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/expresso_main.rs:81:3
[INFO] [stdout]    |
[INFO] [stdout] 81 |         expression.from_str( &argument );
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let _ = expression.from_str( &argument );
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.84s
[INFO] running `Command { std: "docker" "inspect" "0aafbbe37d4ac81b8f937f9eb4e4e1aea4233884145dbfc562160fb97c5936ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aafbbe37d4ac81b8f937f9eb4e4e1aea4233884145dbfc562160fb97c5936ab", kill_on_drop: false }`
[INFO] [stdout] 0aafbbe37d4ac81b8f937f9eb4e4e1aea4233884145dbfc562160fb97c5936ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0e3427b127032c91d93acd1e758ded3087d29870564964ee0ac5d86fae30934d
[INFO] running `Command { std: "docker" "start" "-a" "0e3427b127032c91d93acd1e758ded3087d29870564964ee0ac5d86fae30934d", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `crate::tokenizer::Token`
[INFO] [stdout]  --> src/expression.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::tokenizer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::variable_storage::VariableStorage`
[INFO] [stdout]  --> src/expression.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::variable_storage::VariableStorage;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OPERATORS`
[INFO] [stdout]  --> src/instructions.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::operator::{Operator,OPERATORS};
[INFO] [stdout]   |                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tokenizer::Token`
[INFO] [stdout]  --> src/variable_stack.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::tokenizer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/variable_storage.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tokenizer.rs:298:18
[INFO] [stdout]     |
[INFO] [stdout] 298 |     pub fn scanner( &self ) -> &'a Scanner {
[INFO] [stdout]     |                     ^^^^^          ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 298 |     pub fn scanner( &self ) -> &'a Scanner<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/variable_storage.rs:51:15
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter< String, Variable > {
[INFO] [stdout]    |                  ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter<'_,  String, Variable > {
[INFO] [stdout]    |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/variable_storage.rs:55:16
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys< String, Variable > {
[INFO] [stdout]    |                   ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys<'_,  String, Variable > {
[INFO] [stdout]    |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling expresso v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `expresso::variable_storage::VariableStorage`
[INFO] [stdout]  --> src/expresso_main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use expresso::variable_storage::VariableStorage;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/expresso_main.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 72 |                         todo!("setVar( {:?}, {:?} )", n, v );
[INFO] [stdout]    |                         ------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 73 |                         false
[INFO] [stdout]    |                         ^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/expresso_main.rs:37:3
[INFO] [stdout]    |
[INFO] [stdout] 37 |         machine.load_variable_storage( variable_filename );
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let _ = machine.load_variable_storage( variable_filename );
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tokenizer::Token`
[INFO] [stdout]  --> src/expression.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::tokenizer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::variable_storage::VariableStorage`
[INFO] [stdout]  --> src/expression.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::variable_storage::VariableStorage;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OPERATORS`
[INFO] [stdout]  --> src/instructions.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::operator::{Operator,OPERATORS};
[INFO] [stdout]   |                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tokenizer::Token`
[INFO] [stdout]  --> src/variable_stack.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::tokenizer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/variable_storage.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::variable_storage::VariableStorage`
[INFO] [stdout]   --> src/tests.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use super::variable_storage::VariableStorage;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/expresso_main.rs:81:3
[INFO] [stdout]    |
[INFO] [stdout] 81 |         expression.from_str( &argument );
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let _ = expression.from_str( &argument );
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tokenizer.rs:298:18
[INFO] [stdout]     |
[INFO] [stdout] 298 |     pub fn scanner( &self ) -> &'a Scanner {
[INFO] [stdout]     |                     ^^^^^          ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 298 |     pub fn scanner( &self ) -> &'a Scanner<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/variable_storage.rs:51:15
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter< String, Variable > {
[INFO] [stdout]    |                  ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter<'_,  String, Variable > {
[INFO] [stdout]    |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/variable_storage.rs:55:16
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys< String, Variable > {
[INFO] [stdout]    |                   ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys<'_,  String, Variable > {
[INFO] [stdout]    |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:425:2
[INFO] [stdout]     |
[INFO] [stdout] 425 |     expression.from_str( "1+2" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 425 |     let _ = expression.from_str( "1+2" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:432:2
[INFO] [stdout]     |
[INFO] [stdout] 432 |     expression.from_str( "1+2" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 432 |     let _ = expression.from_str( "1+2" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:435:2
[INFO] [stdout]     |
[INFO] [stdout] 435 |     expression.from_str( "1+" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 435 |     let _ = expression.from_str( "1+" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:443:2
[INFO] [stdout]     |
[INFO] [stdout] 443 |     expression.from_str( "(1+2*5+9-10)/(4-2)" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 443 |     let _ = expression.from_str( "(1+2*5+9-10)/(4-2)" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:451:2
[INFO] [stdout]     |
[INFO] [stdout] 451 |     expression.from_str( "fun3(1,2,3)" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 451 |     let _ = expression.from_str( "fun3(1,2,3)" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:462:2
[INFO] [stdout]     |
[INFO] [stdout] 462 |     expression.from_str( "" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 462 |     let _ = expression.from_str( "" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:470:2
[INFO] [stdout]     |
[INFO] [stdout] 470 |     expression.from_str( "1 +" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 470 |     let _ = expression.from_str( "1 +" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tests.rs:473:2
[INFO] [stdout]     |
[INFO] [stdout] 473 |     expression.from_str( "1 1 1 +" );
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 473 |     let _ = expression.from_str( "1 1 1 +" );
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "0e3427b127032c91d93acd1e758ded3087d29870564964ee0ac5d86fae30934d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e3427b127032c91d93acd1e758ded3087d29870564964ee0ac5d86fae30934d", kill_on_drop: false }`
[INFO] [stdout] 0e3427b127032c91d93acd1e758ded3087d29870564964ee0ac5d86fae30934d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 27ff4ab0d8ad683989cca7a6cb64320b4f0cb94d60851da3654812cae469037f
[INFO] running `Command { std: "docker" "start" "-a" "27ff4ab0d8ad683989cca7a6cb64320b4f0cb94d60851da3654812cae469037f", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::tokenizer::Token`
[INFO] [stderr]  --> src/expression.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use crate::tokenizer::Token;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::variable_storage::VariableStorage`
[INFO] [stderr]  --> src/expression.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::variable_storage::VariableStorage;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `OPERATORS`
[INFO] [stderr]  --> src/instructions.rs:2:32
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::operator::{Operator,OPERATORS};
[INFO] [stderr]   |                                ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::tokenizer::Token`
[INFO] [stderr]  --> src/variable_stack.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::tokenizer::Token;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/variable_storage.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/tokenizer.rs:298:18
[INFO] [stderr]     |
[INFO] [stderr] 298 |     pub fn scanner( &self ) -> &'a Scanner {
[INFO] [stderr]     |                     ^^^^^          ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 298 |     pub fn scanner( &self ) -> &'a Scanner<'_> {
[INFO] [stderr]     |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/variable_storage.rs:51:15
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter< String, Variable > {
[INFO] [stderr]    |                  ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn iter( &self ) -> std::collections::hash_map::Iter<'_,  String, Variable > {
[INFO] [stderr]    |                                                              +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/variable_storage.rs:55:16
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys< String, Variable > {
[INFO] [stderr]    |                   ^^^^^      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn names( &self ) -> std::collections::hash_map::Keys<'_,  String, Variable > {
[INFO] [stderr]    |                                                               +++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::variable_storage::VariableStorage`
[INFO] [stderr]   --> src/tests.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use super::variable_storage::VariableStorage;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:425:2
[INFO] [stderr]     |
[INFO] [stderr] 425 |     expression.from_str( "1+2" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 425 |     let _ = expression.from_str( "1+2" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:432:2
[INFO] [stderr]     |
[INFO] [stderr] 432 |     expression.from_str( "1+2" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 432 |     let _ = expression.from_str( "1+2" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:435:2
[INFO] [stderr]     |
[INFO] [stderr] 435 |     expression.from_str( "1+" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 435 |     let _ = expression.from_str( "1+" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:443:2
[INFO] [stderr]     |
[INFO] [stderr] 443 |     expression.from_str( "(1+2*5+9-10)/(4-2)" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 443 |     let _ = expression.from_str( "(1+2*5+9-10)/(4-2)" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:451:2
[INFO] [stderr]     |
[INFO] [stderr] 451 |     expression.from_str( "fun3(1,2,3)" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 451 |     let _ = expression.from_str( "fun3(1,2,3)" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:462:2
[INFO] [stderr]     |
[INFO] [stderr] 462 |     expression.from_str( "" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 462 |     let _ = expression.from_str( "" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:470:2
[INFO] [stderr]     |
[INFO] [stderr] 470 |     expression.from_str( "1 +" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 470 |     let _ = expression.from_str( "1 +" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tests.rs:473:2
[INFO] [stderr]     |
[INFO] [stderr] 473 |     expression.from_str( "1 1 1 +" );
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 473 |     let _ = expression.from_str( "1 1 1 +" );
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `expresso` (lib) generated 8 warnings (run `cargo fix --lib -p expresso` to apply 8 suggestions)
[INFO] [stderr] warning: `expresso` (lib test) generated 17 warnings (8 duplicates) (run `cargo fix --lib -p expresso --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unused import: `expresso::variable_storage::VariableStorage`
[INFO] [stderr]  --> src/expresso_main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use expresso::variable_storage::VariableStorage;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/expresso_main.rs:73:7
[INFO] [stderr]    |
[INFO] [stderr] 72 |                         todo!("setVar( {:?}, {:?} )", n, v );
[INFO] [stderr]    |                         ------------------------------------ any code following this expression is unreachable
[INFO] [stderr] 73 |                         false
[INFO] [stderr]    |                         ^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/expresso_main.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 |         machine.load_variable_storage( variable_filename );
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let _ = machine.load_variable_storage( variable_filename );
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/expresso_main.rs:81:3
[INFO] [stderr]    |
[INFO] [stderr] 81 |         expression.from_str( &argument );
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let _ = expression.from_str( &argument );
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `expresso` (bin "expresso" test) generated 4 warnings (run `cargo fix --bin "expresso" -p expresso --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/expresso-48a4d51c1b190a90)
[INFO] [stdout] 
[INFO] [stdout] running 37 tests
[INFO] [stdout] test tests::expression_handles_function_call_list_with_three_elements ... ok
[INFO] [stdout] test tests::expression_returns_correct_default ... ok
[INFO] [stdout] test tests::expression_returns_correct_default_for_invalid_expression ... ok
[INFO] [stdout] test tests::expression_validation_works ... ok
[INFO] [stdout] test tests::expression_works ... ok
[INFO] [stdout] test tests::expression_works_complex ... ok
[INFO] [stdout] test tests::infix_to_postfix_complex ... ok
[INFO] [stdout] test tests::infix_to_postfix_simple ... ok
[INFO] [stdout] test tests::infix_to_postfix_simple_braces ... ok
[INFO] [stdout] test tests::infix_to_postfix_simple_mixed_numbers ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::scanner_checks_empty ... ok
[INFO] [stdout] test tests::scanner_checks_not_empty ... ok
[INFO] [stdout] test tests::scanner_peeks_and_pops ... ok
[INFO] [stdout] test tests::scanner_peeks_on_empty ... ok
[INFO] [stdout] test tests::scanner_returns_correct_position ... ok
[INFO] [stdout] test tests::scanner_works_if_the_chat_loves_me ... ok
[INFO] [stdout] test tests::scanner_works_with_braille ... ok
[INFO] [stdout] test tests::tokenizer_checks_empty ... ok
[INFO] [stdout] test tests::tokenizer_checks_not_empty ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_braces ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_function_call ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_float ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_numbers_with_whitespace ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_string_literal ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_numbers_with_leading_whitespace ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_simple_expression ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_string_literal_unterminated ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_variable ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_whitespace_with_error ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_variable_without_name ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_number ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_string_literal_empty_unterminated ... ok
[INFO] [stdout] test tests::tokenizer_tokenizes_string_literal_empty ... ok
[INFO] [stdout] test tests::variable_stack_works ... ok
[INFO] [stdout] test tests::variable_stack_supports_typed_pop ... ok
[INFO] [stdout] test tests::variable_stack_panics_on_wrong_type - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 37 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/expresso_main.rs (/opt/rustwide/target/debug/deps/expresso-bce6aab9a7cfdc1e)
[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] [stderr]    Doc-tests expresso
[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" "27ff4ab0d8ad683989cca7a6cb64320b4f0cb94d60851da3654812cae469037f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27ff4ab0d8ad683989cca7a6cb64320b4f0cb94d60851da3654812cae469037f", kill_on_drop: false }`
[INFO] [stdout] 27ff4ab0d8ad683989cca7a6cb64320b4f0cb94d60851da3654812cae469037f
