[INFO] cloning repository https://github.com/lord/learnllvm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lord/learnllvm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flord%2Flearnllvm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flord%2Flearnllvm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4fc6a517b229c7ffc4f2a74e14df8185a9e2d2ea
[INFO] checking lord/learnllvm against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flord%2Flearnllvm" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lord/learnllvm on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lord/learnllvm
[INFO] finished tweaking git repo https://github.com/lord/learnllvm
[INFO] tweaked toml for git repo https://github.com/lord/learnllvm written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lord/learnllvm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f89b595aed66e7373cf212671df831e9c014663545a0831e4a0acf66caf02dbf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f89b595aed66e7373cf212671df831e9c014663545a0831e4a0acf66caf02dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f89b595aed66e7373cf212671df831e9c014663545a0831e4a0acf66caf02dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f89b595aed66e7373cf212671df831e9c014663545a0831e4a0acf66caf02dbf", kill_on_drop: false }`
[INFO] [stdout] f89b595aed66e7373cf212671df831e9c014663545a0831e4a0acf66caf02dbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 267208760c696c28cb7bf91ae8677ba2debb255f2e316e99608a803521a64468
[INFO] running `Command { std: "docker" "start" "-a" "267208760c696c28cb7bf91ae8677ba2debb255f2e316e99608a803521a64468", 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] [stderr]    Compiling gcc v0.3.38
[INFO] [stderr]     Checking libc v0.2.17
[INFO] [stderr]    Compiling llvm-alt v0.5.0
[INFO] [stderr]     Checking nom v2.0.0
[INFO] [stderr]     Checking cbox v0.3.0
[INFO] [stderr]    Compiling llvm-sys v0.4.0
[INFO] [stderr]     Checking kscope v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Value`
[INFO] [stdout]  --> src/main.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | use llvm::{Context, Builder, Module, Value};
[INFO] [stdout]   |                                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |   let (lhs, rest) = try!(primary_expr(rem));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:97:29
[INFO] [stdout]    |
[INFO] [stdout] 97 |   let (mut rhs, mut rest) = try!(primary_expr(rest));
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:101:33
[INFO] [stdout]     |
[INFO] [stdout] 101 |       let (new_rhs, new_rest) = try!(parse_binop_rhs(get_token_precedence(op) + 1, rhs, rest));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:136:35
[INFO] [stdout]     |
[INFO] [stdout] 136 |     let (expr, rest_from_parse) = try!(parse_single_expr(rest));
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:145:22
[INFO] [stdout]     |
[INFO] [stdout] 145 |   let (expr, rest) = try!(parse_single_expr(rem));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:187:23
[INFO] [stdout]     |
[INFO] [stdout] 187 |   let (proto, rest) = try!(prototype_expr(rem));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:188:22
[INFO] [stdout]     |
[INFO] [stdout] 188 |   let (expr, rest) = try!(parse_single_expr(rest));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BasicBlock`
[INFO] [stdout]  --> src/codegen.rs:2:84
[INFO] [stdout]   |
[INFO] [stdout] 2 | use llvm::{Context, Value, Compile, Builder, Module, Type, FunctionType, Function, BasicBlock};
[INFO] [stdout]   |                                                                                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |   let ret_val = try!(codegen(ctx, builder, module, vals, func_ast.body));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:62:22
[INFO] [stdout]    |
[INFO] [stdout] 62 |       let lhs_code = try!(codegen(ctx, builder, module, vals, *lhs));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:63:22
[INFO] [stdout]    |
[INFO] [stdout] 63 |       let rhs_code = try!(codegen(ctx, builder, module, vals, *rhs));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:84:23
[INFO] [stdout]    |
[INFO] [stdout] 84 |         arg_vals.push(try!(codegen(ctx, builder, module, vals, arg)));
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/codegen.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 78 |       if (func.get_signature().num_params() != arg_names.len()) {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `llvm_sys::core::LLVMDumpValue`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use llvm_sys::core::LLVMDumpValue;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `llvm_sys::prelude::LLVMValueRef`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use llvm_sys::prelude::LLVMValueRef;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Value`
[INFO] [stdout]  --> src/main.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | use llvm::{Context, Builder, Module, Value};
[INFO] [stdout]   |                                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |   let (lhs, rest) = try!(primary_expr(rem));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:97:29
[INFO] [stdout]    |
[INFO] [stdout] 97 |   let (mut rhs, mut rest) = try!(primary_expr(rest));
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:101:33
[INFO] [stdout]     |
[INFO] [stdout] 101 |       let (new_rhs, new_rest) = try!(parse_binop_rhs(get_token_precedence(op) + 1, rhs, rest));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:136:35
[INFO] [stdout]     |
[INFO] [stdout] 136 |     let (expr, rest_from_parse) = try!(parse_single_expr(rest));
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:145:22
[INFO] [stdout]     |
[INFO] [stdout] 145 |   let (expr, rest) = try!(parse_single_expr(rem));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:187:23
[INFO] [stdout]     |
[INFO] [stdout] 187 |   let (proto, rest) = try!(prototype_expr(rem));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:188:22
[INFO] [stdout]     |
[INFO] [stdout] 188 |   let (expr, rest) = try!(parse_single_expr(rest));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BasicBlock`
[INFO] [stdout]  --> src/codegen.rs:2:84
[INFO] [stdout]   |
[INFO] [stdout] 2 | use llvm::{Context, Value, Compile, Builder, Module, Type, FunctionType, Function, BasicBlock};
[INFO] [stdout]   |                                                                                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |   let ret_val = try!(codegen(ctx, builder, module, vals, func_ast.body));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:62:22
[INFO] [stdout]    |
[INFO] [stdout] 62 |       let lhs_code = try!(codegen(ctx, builder, module, vals, *lhs));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:63:22
[INFO] [stdout]    |
[INFO] [stdout] 63 |       let rhs_code = try!(codegen(ctx, builder, module, vals, *rhs));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/codegen.rs:84:23
[INFO] [stdout]    |
[INFO] [stdout] 84 |         arg_vals.push(try!(codegen(ctx, builder, module, vals, arg)));
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/codegen.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 78 |       if (func.get_signature().num_params() != arg_names.len()) {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `llvm_sys::core::LLVMDumpValue`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use llvm_sys::core::LLVMDumpValue;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `llvm_sys::prelude::LLVMValueRef`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use llvm_sys::prelude::LLVMValueRef;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]   --> src/codegen.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 15 |   builder: &'a Builder,
[INFO] [stdout]    |   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vals`
[INFO] [stdout]   --> src/codegen.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 |   vals: &mut HashMap<String, &'a Value>,
[INFO] [stdout]    |   ^^^^ help: if this is intentional, prefix it with an underscore: `_vals`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 |   let mut module = Module::new("mod_name", &ctx);
[INFO] [stdout]    |       ----^^^^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builder`
[INFO] [stdout]   --> src/codegen.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 15 |   builder: &'a Builder,
[INFO] [stdout]    |   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builder`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vals`
[INFO] [stdout]   --> src/codegen.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 |   vals: &mut HashMap<String, &'a Value>,
[INFO] [stdout]    |   ^^^^ help: if this is intentional, prefix it with an underscore: `_vals`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 |   let mut module = Module::new("mod_name", &ctx);
[INFO] [stdout]    |       ----^^^^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.81s
[INFO] running `Command { std: "docker" "inspect" "267208760c696c28cb7bf91ae8677ba2debb255f2e316e99608a803521a64468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "267208760c696c28cb7bf91ae8677ba2debb255f2e316e99608a803521a64468", kill_on_drop: false }`
[INFO] [stdout] 267208760c696c28cb7bf91ae8677ba2debb255f2e316e99608a803521a64468