[INFO] cloning repository https://github.com/v4kst1z/TIP
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/v4kst1z/TIP" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fv4kst1z%2FTIP", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fv4kst1z%2FTIP'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 71322981a1532112fb88bf47f2c2a98933e23ba5
[INFO] checking v4kst1z/TIP against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fv4kst1z%2FTIP" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/v4kst1z/TIP
[INFO] finished tweaking git repo https://github.com/v4kst1z/TIP
[INFO] tweaked toml for git repo https://github.com/v4kst1z/TIP written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/v4kst1z/TIP on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 858a9e0790827812313040c2fbbacb5bdc714fb20afd27cc8c8a28cdeb1016de
[INFO] running `Command { std: "docker" "start" "-a" "858a9e0790827812313040c2fbbacb5bdc714fb20afd27cc8c8a28cdeb1016de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "858a9e0790827812313040c2fbbacb5bdc714fb20afd27cc8c8a28cdeb1016de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "858a9e0790827812313040c2fbbacb5bdc714fb20afd27cc8c8a28cdeb1016de", kill_on_drop: false }`
[INFO] [stdout] 858a9e0790827812313040c2fbbacb5bdc714fb20afd27cc8c8a28cdeb1016de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cfd15bd2e7087696016ea75f2d38795922fe46b03603cb79a3e3cd898fa634e0
[INFO] running `Command { std: "docker" "start" "-a" "cfd15bd2e7087696016ea75f2d38795922fe46b03603cb79a3e3cd898fa634e0", kill_on_drop: false }`
[INFO] [stderr]     Checking lexer v0.1.0 (/opt/rustwide/workdir/lexer)
[INFO] [stderr]     Checking parser v0.1.0 (/opt/rustwide/workdir/parser)
[INFO] [stderr]     Checking type_analysis v0.1.0 (/opt/rustwide/workdir/type_analysis)
[INFO] [stderr]     Checking cfg v0.1.0 (/opt/rustwide/workdir/cfg)
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> type_analysis/src/constraint.rs:96:44
[INFO] [stdout]    |
[INFO] [stdout] 96 |                 a.clone(), constraints, env.borrow()
[INFO] [stdout]    |                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 96 -                 a.clone(), constraints, env.borrow()
[INFO] [stdout] 96 +                 a.clone(), constraints, env
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]   --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout]  6 + #[derive(Clone)]
[INFO] [stdout]  7 | pub struct Symbols {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:136:24
[INFO] [stdout]     |
[INFO] [stdout] 136 |                     env.borrow()
[INFO] [stdout]     |                        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 136 -                     env.borrow()
[INFO] [stdout] 136 +                     env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:157:51
[INFO] [stdout]     |
[INFO] [stdout] 157 |                     expr.clone(), constraints, env.borrow()
[INFO] [stdout]     |                                                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 157 -                     expr.clone(), constraints, env.borrow()
[INFO] [stdout] 157 +                     expr.clone(), constraints, env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:188:20
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 env.borrow()
[INFO] [stdout]     |                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 188 -                 env.borrow()
[INFO] [stdout] 188 +                 env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:204:20
[INFO] [stdout]     |
[INFO] [stdout] 204 |                 env.borrow()
[INFO] [stdout]     |                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 204 -                 env.borrow()
[INFO] [stdout] 204 +                 env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:209:20
[INFO] [stdout]     |
[INFO] [stdout] 209 |                 env.borrow()
[INFO] [stdout]     |                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 209 -                 env.borrow()
[INFO] [stdout] 209 +                 env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:247:43
[INFO] [stdout]     |
[INFO] [stdout] 247 |                     stmt, constraints, env.borrow()
[INFO] [stdout]     |                                           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 247 -                     stmt, constraints, env.borrow()
[INFO] [stdout] 247 +                     stmt, constraints, env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:258:89
[INFO] [stdout]     |
[INFO] [stdout] 258 |                 constraints = generate_type_constraints_from_stmt(stmt, constraints, env.borrow());
[INFO] [stdout]     |                                                                                         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 258 -                 constraints = generate_type_constraints_from_stmt(stmt, constraints, env.borrow());
[INFO] [stdout] 258 +                 constraints = generate_type_constraints_from_stmt(stmt, constraints, env);
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:265:43
[INFO] [stdout]     |
[INFO] [stdout] 265 |                     stmt, constraints, env.borrow()
[INFO] [stdout]     |                                           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 265 -                     stmt, constraints, env.borrow()
[INFO] [stdout] 265 +                     stmt, constraints, env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/constraint.rs:271:47
[INFO] [stdout]     |
[INFO] [stdout] 271 |                         stmt, constraints, env.borrow()
[INFO] [stdout]     |                                               ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Symbols` does not implement `Borrow`, so calling `borrow` on `&Symbols` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 271 -                         stmt, constraints, env.borrow()
[INFO] [stdout] 271 +                         stmt, constraints, env
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Symbols`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/symbol.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout]   6 + #[derive(Clone)]
[INFO] [stdout]   7 | pub struct Symbols {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/type_check.rs:113:54
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let expr_desc = unsafe { (*expr.as_ptr()).borrow().expr.borrow() };
[INFO] [stdout]     |                                                      ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Expression` does not implement `Borrow`, so calling `borrow` on `&Expression` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 113 -             let expr_desc = unsafe { (*expr.as_ptr()).borrow().expr.borrow() };
[INFO] [stdout] 113 +             let expr_desc = unsafe { (*expr.as_ptr()).expr.borrow() };
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Expression`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/ast.rs:137:1
[INFO] [stdout]     |
[INFO] [stdout] 137 + #[derive(Clone)]
[INFO] [stdout] 138 | pub struct Expression {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> type_analysis/src/type_check.rs:126:54
[INFO] [stdout]     |
[INFO] [stdout] 126 |             let expr_desc = unsafe { (*expr.as_ptr()).borrow().expr.borrow() };
[INFO] [stdout]     |                                                      ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Expression` does not implement `Borrow`, so calling `borrow` on `&Expression` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 126 -             let expr_desc = unsafe { (*expr.as_ptr()).borrow().expr.borrow() };
[INFO] [stdout] 126 +             let expr_desc = unsafe { (*expr.as_ptr()).expr.borrow() };
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Expression`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/workdir/parser/src/ast.rs:137:1
[INFO] [stdout]     |
[INFO] [stdout] 137 + #[derive(Clone)]
[INFO] [stdout] 138 | pub struct Expression {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> type_analysis/src/decl_check.rs:85:42
[INFO] [stdout]    |
[INFO] [stdout] 85 |         if let Some(_decl) = global.look(name.parse().unwrap()) {
[INFO] [stdout]    |                                          ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `type_analysis` (lib) due to 1 previous error; 12 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "cfd15bd2e7087696016ea75f2d38795922fe46b03603cb79a3e3cd898fa634e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfd15bd2e7087696016ea75f2d38795922fe46b03603cb79a3e3cd898fa634e0", kill_on_drop: false }`
[INFO] [stdout] cfd15bd2e7087696016ea75f2d38795922fe46b03603cb79a3e3cd898fa634e0
