[INFO] updating cached repository https://github.com/clarkezone/simple_c_compiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac9db8f0fcfcef7153b9b0aa01d2dec72f59e1b3
[INFO] checking clarkezone/simple_c_compiler/ac9db8f0fcfcef7153b9b0aa01d2dec72f59e1b3 against master#0f6e1ae67854c3c44726e8376144c16b465fe7c6 for pr-129392
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclarkezone%2Fsimple_c_compiler" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/clarkezone/simple_c_compiler on toolchain 0f6e1ae67854c3c44726e8376144c16b465fe7c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/clarkezone/simple_c_compiler
[INFO] finished tweaking git repo https://github.com/clarkezone/simple_c_compiler
[INFO] tweaked toml for git repo https://github.com/clarkezone/simple_c_compiler written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/clarkezone/simple_c_compiler 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" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c70c39d9b8dc1c5eb0e4d80a8aa4d46921529021c4c2ae06364abb4531a80a44
[INFO] running `Command { std: "docker" "start" "-a" "c70c39d9b8dc1c5eb0e4d80a8aa4d46921529021c4c2ae06364abb4531a80a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c70c39d9b8dc1c5eb0e4d80a8aa4d46921529021c4c2ae06364abb4531a80a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c70c39d9b8dc1c5eb0e4d80a8aa4d46921529021c4c2ae06364abb4531a80a44", kill_on_drop: false }`
[INFO] [stdout] c70c39d9b8dc1c5eb0e4d80a8aa4d46921529021c4c2ae06364abb4531a80a44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7a57e647be753f96f6ebc7d337e1b2759ef85e1daf7fdbc0cf44aa1e6278e00
[INFO] running `Command { std: "docker" "start" "-a" "f7a57e647be753f96f6ebc7d337e1b2759ef85e1daf7fdbc0cf44aa1e6278e00", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex v0.2.3
[INFO] [stderr]     Checking simple_c_compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]    --> src/lexer.rs:285:13
[INFO] [stdout]     |
[INFO] [stdout] 285 |         use std::fs;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/ast.rs:65:60
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Function)));
[INFO] [stdout]    |                                                            ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 65 -                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Function)));
[INFO] [stdout] 65 +                 let mut boxed_node = Box::new(AstNode::new(AstNodeType::Function));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/ast.rs:116:60
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Statement)));
[INFO] [stdout]     |                                                            ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 116 -                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Statement)));
[INFO] [stdout] 116 +                 let mut boxed_node = Box::new(AstNode::new(AstNodeType::Statement));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/ast.rs:136:60
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Expression)));
[INFO] [stdout]     |                                                            ^                       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 136 -                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Expression)));
[INFO] [stdout] 136 +                 let mut boxed_node = Box::new(AstNode::new(AstNodeType::Expression));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]    --> src/ast.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 |         use std::fs;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::*`
[INFO] [stdout]   --> src/codegen.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         use lexer::*;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/codegen.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         use std::fs;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::*`
[INFO] [stdout]   --> src/codegen.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |         use ast::*;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/codegen.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |         use std::path::Path;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/ast.rs:65:60
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Function)));
[INFO] [stdout]    |                                                            ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 65 -                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Function)));
[INFO] [stdout] 65 +                 let mut boxed_node = Box::new(AstNode::new(AstNodeType::Function));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/ast.rs:116:60
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Statement)));
[INFO] [stdout]     |                                                            ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 116 -                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Statement)));
[INFO] [stdout] 116 +                 let mut boxed_node = Box::new(AstNode::new(AstNodeType::Statement));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/ast.rs:136:60
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Expression)));
[INFO] [stdout]     |                                                            ^                       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 136 -                 let mut boxed_node = Box::new(AstNode::new((AstNodeType::Expression)));
[INFO] [stdout] 136 +                 let mut boxed_node = Box::new(AstNode::new(AstNodeType::Expression));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/codegen.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         use std::fs;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     &mut emitstack.push(String::from("ret"));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     let _ = &mut emitstack.push(String::from("ret"));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |                     &mut emitstack.push(String::from(format!("mov ${}, %eax", ret_arg.unwrap())));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 67 |                     let _ = &mut emitstack.push(String::from(format!("mov ${}, %eax", ret_arg.unwrap())));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     &mut emitstack.push(String::from("_main:"));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     let _ = &mut emitstack.push(String::from("_main:"));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     &mut emitstack.push(String::from(".globl _main"));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     let _ = &mut emitstack.push(String::from(".globl _main"));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/ast.rs:178:28
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     panic!(x);
[INFO] [stdout]     |                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` 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] 178 |                     panic!("{}", x);
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     &mut emitstack.push(String::from("ret"));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     let _ = &mut emitstack.push(String::from("ret"));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |                     &mut emitstack.push(String::from(format!("mov ${}, %eax", ret_arg.unwrap())));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 67 |                     let _ = &mut emitstack.push(String::from(format!("mov ${}, %eax", ret_arg.unwrap())));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     &mut emitstack.push(String::from("_main:"));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     let _ = &mut emitstack.push(String::from("_main:"));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/codegen.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     &mut emitstack.push(String::from(".globl _main"));
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     let _ = &mut emitstack.push(String::from(".globl _main"));
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.65s
[INFO] running `Command { std: "docker" "inspect" "f7a57e647be753f96f6ebc7d337e1b2759ef85e1daf7fdbc0cf44aa1e6278e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7a57e647be753f96f6ebc7d337e1b2759ef85e1daf7fdbc0cf44aa1e6278e00", kill_on_drop: false }`
[INFO] [stdout] f7a57e647be753f96f6ebc7d337e1b2759ef85e1daf7fdbc0cf44aa1e6278e00