[INFO] fetching crate ruSTLa 0.38.0...
[INFO] checking ruSTLa-0.38.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ruSTLa 0.38.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ruSTLa 0.38.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruSTLa 0.38.0
[INFO] finished tweaking crates.io crate ruSTLa 0.38.0
[INFO] tweaked toml for crates.io crate ruSTLa 0.38.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate ruSTLa 0.38.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d30dc1834349f66bbca8d42fee21ba5969f4845ebd7e9678faa9ed217975394f
[INFO] running `Command { std: "docker" "start" "-a" "d30dc1834349f66bbca8d42fee21ba5969f4845ebd7e9678faa9ed217975394f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d30dc1834349f66bbca8d42fee21ba5969f4845ebd7e9678faa9ed217975394f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d30dc1834349f66bbca8d42fee21ba5969f4845ebd7e9678faa9ed217975394f", kill_on_drop: false }`
[INFO] [stdout] d30dc1834349f66bbca8d42fee21ba5969f4845ebd7e9678faa9ed217975394f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5459e2122de52636c4634e17ac9d72a58984a39c441eb6276b6b02f6b4b15c8a
[INFO] running `Command { std: "docker" "start" "-a" "5459e2122de52636c4634e17ac9d72a58984a39c441eb6276b6b02f6b4b15c8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling ruSTLa v0.38.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/block_quote.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/body.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex_patterns` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/transitions.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `regex_patterns` is already imported here
[INFO] [stdout] 8 | use crate::parser::regex_patterns;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/block_quote.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/body.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex_patterns` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/transitions.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `regex_patterns` is already imported here
[INFO] [stdout] 8 | use crate::parser::regex_patterns;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rustla` is imported redundantly
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rustla;
[INFO] [stdout]   |     ^^^^^^ the item `rustla` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rustla` is imported redundantly
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rustla;
[INFO] [stdout]   |     ^^^^^^ the item `rustla` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/parser/tests/test_unknown_directives.rs:108:55
[INFO] [stdout]     |
[INFO] [stdout] 108 |             assert!(options.get("option4").is_none(), true);
[INFO] [stdout]     |                                                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `assert!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 108 |             assert!(options.get("option4").is_none(), "{}", true);
[INFO] [stdout]     |                                                       +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.27s
[INFO] running `Command { std: "docker" "inspect" "5459e2122de52636c4634e17ac9d72a58984a39c441eb6276b6b02f6b4b15c8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5459e2122de52636c4634e17ac9d72a58984a39c441eb6276b6b02f6b4b15c8a", kill_on_drop: false }`
[INFO] [stdout] 5459e2122de52636c4634e17ac9d72a58984a39c441eb6276b6b02f6b4b15c8a
[INFO] checking ruSTLa-0.38.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate ruSTLa 0.38.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate ruSTLa 0.38.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruSTLa 0.38.0
[INFO] finished tweaking crates.io crate ruSTLa 0.38.0
[INFO] tweaked toml for crates.io crate ruSTLa 0.38.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate ruSTLa 0.38.0 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f17c562e1f3efd786456ca1169fdaf295b2eb2dc86bd167e7cc3be6a002b1313
[INFO] running `Command { std: "docker" "start" "-a" "f17c562e1f3efd786456ca1169fdaf295b2eb2dc86bd167e7cc3be6a002b1313", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f17c562e1f3efd786456ca1169fdaf295b2eb2dc86bd167e7cc3be6a002b1313", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f17c562e1f3efd786456ca1169fdaf295b2eb2dc86bd167e7cc3be6a002b1313", kill_on_drop: false }`
[INFO] [stdout] f17c562e1f3efd786456ca1169fdaf295b2eb2dc86bd167e7cc3be6a002b1313
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e349c5ed4b39efc194f45bbbfead5d006d6fc84dfe971d54eede327062b8199
[INFO] running `Command { std: "docker" "start" "-a" "2e349c5ed4b39efc194f45bbbfead5d006d6fc84dfe971d54eede327062b8199", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling ruSTLa v0.38.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/block_quote.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/body.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex_patterns` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/transitions.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `regex_patterns` is already imported here
[INFO] [stdout] 8 | use crate::parser::regex_patterns;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/block_quote.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IndentedBlockResult` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/body.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `IndentedBlockResult` is already imported here
[INFO] [stdout] 8 | use crate::parser::types_and_aliases::IndentedBlockResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex_patterns` is imported redundantly
[INFO] [stdout]  --> src/parser/state_machine/transitions.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::*;
[INFO] [stdout]   |     -------- the item `regex_patterns` is already imported here
[INFO] [stdout] 8 | use crate::parser::regex_patterns;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rustla` is imported redundantly
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rustla;
[INFO] [stdout]   |     ^^^^^^ the item `rustla` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rustla` is imported redundantly
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rustla;
[INFO] [stdout]   |     ^^^^^^ the item `rustla` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/parser/tests/test_unknown_directives.rs:108:55
[INFO] [stdout]     |
[INFO] [stdout] 108 |             assert!(options.get("option4").is_none(), true);
[INFO] [stdout]     |                                                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `assert!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 108 |             assert!(options.get("option4").is_none(), "{}", true);
[INFO] [stdout]     |                                                       +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.81s
[INFO] running `Command { std: "docker" "inspect" "2e349c5ed4b39efc194f45bbbfead5d006d6fc84dfe971d54eede327062b8199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e349c5ed4b39efc194f45bbbfead5d006d6fc84dfe971d54eede327062b8199", kill_on_drop: false }`
[INFO] [stdout] 2e349c5ed4b39efc194f45bbbfead5d006d6fc84dfe971d54eede327062b8199