[INFO] cloning repository https://github.com/0x59616e/emacc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0x59616e/emacc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0x59616e%2Femacc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0x59616e%2Femacc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d849e74ae8aa1c82b9f3fd6b9f75b5b6971a2b1
[INFO] testing 0x59616e/emacc against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0x59616e%2Femacc" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/0x59616e/emacc on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/0x59616e/emacc
[INFO] finished tweaking git repo https://github.com/0x59616e/emacc
[INFO] tweaked toml for git repo https://github.com/0x59616e/emacc written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/0x59616e/emacc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05d220b07f4c25cb80228db054c4ed23a4bdf4b57d98b15486d73b193e16621e
[INFO] running `Command { std: "docker" "start" "-a" "05d220b07f4c25cb80228db054c4ed23a4bdf4b57d98b15486d73b193e16621e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05d220b07f4c25cb80228db054c4ed23a4bdf4b57d98b15486d73b193e16621e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05d220b07f4c25cb80228db054c4ed23a4bdf4b57d98b15486d73b193e16621e", kill_on_drop: false }`
[INFO] [stdout] 05d220b07f4c25cb80228db054c4ed23a4bdf4b57d98b15486d73b193e16621e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e626fa95a9a0223768d19d589d23ba5ca3c643fd7877f1fd06288bd8f2e581b
[INFO] running `Command { std: "docker" "start" "-a" "8e626fa95a9a0223768d19d589d23ba5ca3c643fd7877f1fd06288bd8f2e581b", kill_on_drop: false }`
[INFO] [stderr]    Compiling emacc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::instruction::Instruction`
[INFO] [stdout]  --> src/value.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::instruction::Instruction;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/value.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `kind` is never read
[INFO] [stdout]   --> src/lex.rs:85:11
[INFO] [stdout]    |
[INFO] [stdout] 85 |   let mut kind = TokenKind::Useless;
[INFO] [stdout]    |           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Void`
[INFO] [stdout]   --> src/symtab.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   Void,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `condi_br`
[INFO] [stdout]   --> src/instruction.rs:79:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |   condi_br: bool,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shl`
[INFO] [stdout]    --> src/instruction.rs:183:3
[INFO] [stdout]     |
[INFO] [stdout] 183 |   Shl, // <<
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shr`
[INFO] [stdout]    --> src/instruction.rs:184:3
[INFO] [stdout]     |
[INFO] [stdout] 184 |   Shr, // >>
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `And`
[INFO] [stdout]    --> src/instruction.rs:185:3
[INFO] [stdout]     |
[INFO] [stdout] 185 |   And, // bitwise &
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Or`
[INFO] [stdout]    --> src/instruction.rs:186:3
[INFO] [stdout]     |
[INFO] [stdout] 186 |   Or,  // bitwise |
[INFO] [stdout]     |   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Xor`
[INFO] [stdout]    --> src/instruction.rs:187:3
[INFO] [stdout]     |
[INFO] [stdout] 187 |   Xor, // bitwise ^
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]  --> src/basicblock.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   parent: Option<Rc<RefCell<Function>>>,
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/symtab.rs:152:11
[INFO] [stdout]     |
[INFO] [stdout] 152 |           write!(f, "{}", item);
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "8e626fa95a9a0223768d19d589d23ba5ca3c643fd7877f1fd06288bd8f2e581b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e626fa95a9a0223768d19d589d23ba5ca3c643fd7877f1fd06288bd8f2e581b", kill_on_drop: false }`
[INFO] [stdout] 8e626fa95a9a0223768d19d589d23ba5ca3c643fd7877f1fd06288bd8f2e581b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 400c78199d68a8cb93cc64076ab845fa71bf22ea9ea5eb12db1a39a2ec515b4b
[INFO] running `Command { std: "docker" "start" "-a" "400c78199d68a8cb93cc64076ab845fa71bf22ea9ea5eb12db1a39a2ec515b4b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling emacc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::instruction::Instruction`
[INFO] [stdout]  --> src/value.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::instruction::Instruction;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/value.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `kind` is never read
[INFO] [stdout]   --> src/lex.rs:85:11
[INFO] [stdout]    |
[INFO] [stdout] 85 |   let mut kind = TokenKind::Useless;
[INFO] [stdout]    |           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Void`
[INFO] [stdout]   --> src/symtab.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   Void,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `condi_br`
[INFO] [stdout]   --> src/instruction.rs:79:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |   condi_br: bool,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shl`
[INFO] [stdout]    --> src/instruction.rs:183:3
[INFO] [stdout]     |
[INFO] [stdout] 183 |   Shl, // <<
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shr`
[INFO] [stdout]    --> src/instruction.rs:184:3
[INFO] [stdout]     |
[INFO] [stdout] 184 |   Shr, // >>
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `And`
[INFO] [stdout]    --> src/instruction.rs:185:3
[INFO] [stdout]     |
[INFO] [stdout] 185 |   And, // bitwise &
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Or`
[INFO] [stdout]    --> src/instruction.rs:186:3
[INFO] [stdout]     |
[INFO] [stdout] 186 |   Or,  // bitwise |
[INFO] [stdout]     |   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Xor`
[INFO] [stdout]    --> src/instruction.rs:187:3
[INFO] [stdout]     |
[INFO] [stdout] 187 |   Xor, // bitwise ^
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]  --> src/basicblock.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   parent: Option<Rc<RefCell<Function>>>,
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/symtab.rs:152:11
[INFO] [stdout]     |
[INFO] [stdout] 152 |           write!(f, "{}", item);
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1m 32s
[INFO] running `Command { std: "docker" "inspect" "400c78199d68a8cb93cc64076ab845fa71bf22ea9ea5eb12db1a39a2ec515b4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "400c78199d68a8cb93cc64076ab845fa71bf22ea9ea5eb12db1a39a2ec515b4b", kill_on_drop: false }`
[INFO] [stdout] 400c78199d68a8cb93cc64076ab845fa71bf22ea9ea5eb12db1a39a2ec515b4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ec28e9540fdad7206320933c538d6ab0e00f1f68fcba3d3800edb7a019ad7a1f
[INFO] running `Command { std: "docker" "start" "-a" "ec28e9540fdad7206320933c538d6ab0e00f1f68fcba3d3800edb7a019ad7a1f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `crate::instruction::Instruction`
[INFO] [stderr]  --> src/value.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::instruction::Instruction;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/value.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `kind` is never read
[INFO] [stderr]   --> src/lex.rs:85:11
[INFO] [stderr]    |
[INFO] [stderr] 85 |   let mut kind = TokenKind::Useless;
[INFO] [stderr]    |           ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Void`
[INFO] [stderr]   --> src/symtab.rs:12:3
[INFO] [stderr]    |
[INFO] [stderr] 12 |   Void,
[INFO] [stderr]    |   ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `condi_br`
[INFO] [stderr]   --> src/instruction.rs:79:3
[INFO] [stderr]    |
[INFO] [stderr] 79 |   condi_br: bool,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Shl`
[INFO] [stderr]    --> src/instruction.rs:183:3
[INFO] [stderr]     |
[INFO] [stderr] 183 |   Shl, // <<
[INFO] [stderr]     |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Shr`
[INFO] [stderr]    --> src/instruction.rs:184:3
[INFO] [stderr]     |
[INFO] [stderr] 184 |   Shr, // >>
[INFO] [stderr]     |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `And`
[INFO] [stderr]    --> src/instruction.rs:185:3
[INFO] [stderr]     |
[INFO] [stderr] 185 |   And, // bitwise &
[INFO] [stderr]     |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Or`
[INFO] [stderr]    --> src/instruction.rs:186:3
[INFO] [stderr]     |
[INFO] [stderr] 186 |   Or,  // bitwise |
[INFO] [stderr]     |   ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Xor`
[INFO] [stderr]    --> src/instruction.rs:187:3
[INFO] [stderr]     |
[INFO] [stderr] 187 |   Xor, // bitwise ^
[INFO] [stderr]     |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `parent`
[INFO] [stderr]  --> src/basicblock.rs:8:3
[INFO] [stderr]   |
[INFO] [stderr] 8 |   parent: Option<Rc<RefCell<Function>>>,
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/symtab.rs:152:11
[INFO] [stderr]     |
[INFO] [stderr] 152 |           write!(f, "{}", item);
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/emacc-3bf3db1b08d286d9)
[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" "ec28e9540fdad7206320933c538d6ab0e00f1f68fcba3d3800edb7a019ad7a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec28e9540fdad7206320933c538d6ab0e00f1f68fcba3d3800edb7a019ad7a1f", kill_on_drop: false }`
[INFO] [stdout] ec28e9540fdad7206320933c538d6ab0e00f1f68fcba3d3800edb7a019ad7a1f