[INFO] fetching crate splr 0.6.2...
[INFO] checking splr-0.6.2 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate splr 0.6.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate splr 0.6.2 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate splr 0.6.2
[INFO] finished tweaking crates.io crate splr 0.6.2
[INFO] tweaked toml for crates.io crate splr 0.6.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate splr 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6daba2a6b98dd8dfc5c7d89b78e8f0e22f11c59da2e81ed42f70f3b43d639e2d
[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" "6daba2a6b98dd8dfc5c7d89b78e8f0e22f11c59da2e81ed42f70f3b43d639e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6daba2a6b98dd8dfc5c7d89b78e8f0e22f11c59da2e81ed42f70f3b43d639e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6daba2a6b98dd8dfc5c7d89b78e8f0e22f11c59da2e81ed42f70f3b43d639e2d", kill_on_drop: false }`
[INFO] [stdout] 6daba2a6b98dd8dfc5c7d89b78e8f0e22f11c59da2e81ed42f70f3b43d639e2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80a2f777ca0c2467bb86129062498c6767093623e849889d1db28470fda3a395
[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" "80a2f777ca0c2467bb86129062498c6767093623e849889d1db28470fda3a395", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking splr v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/assign/propagate.rs:133:50
[INFO] [stdout]     |
[INFO] [stdout] 133 |         debug_assert!(!self.trail.contains(&!l), format!("{:?}", l));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/assign/var.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 159 |             format!("nav.{}, nv.{}", self.num_asserted_vars, self.num_vars)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cdb/db.rs:585:42
[INFO] [stdout]     |
[INFO] [stdout] 585 |         debug_assert!(!c.is(Flag::DEAD), format!("found {} is dead: {}", cid, c));
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/processor/mod.rs:484:25
[INFO] [stdout]     |
[INFO] [stdout] 484 |                         format!("{} {:?} {}", cid, c, v.index,)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/processor/mod.rs:490:25
[INFO] [stdout]     |
[INFO] [stdout] 490 |                         format!("{} {:?} {}", cid, c, v.index,)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/solver/conflict.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 | /                     format!(
[INFO] [stdout] 71 | |                         "assign stack contains a strange lit: level {}, stack level {}",
[INFO] [stdout] 72 | |                         original_dl, snd_l
[INFO] [stdout] 73 | |                     )
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/solver/conflict.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 | /                     format!(
[INFO] [stdout] 80 | |                         "{} maps to {:?} {:?}: decision {}",
[INFO] [stdout] 81 | |                         c,
[INFO] [stdout] 82 | |                         c.iter().map(|l| asg.assigned(*l)).collect::<Vec<_>>(),
[INFO] [stdout] 83 | |                         c.iter().map(|l| asg.assign(l.vi())).collect::<Vec<_>>(),
[INFO] [stdout] 84 | |                         decision,
[INFO] [stdout] 85 | |                     )
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/solver/conflict.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 | /         format!(
[INFO] [stdout] 146 | |             "use_{}: {:?}, {:?}",
[INFO] [stdout] 147 | |             use_chronobt,
[INFO] [stdout] 148 | |             cl,
[INFO] [stdout] ...   |
[INFO] [stdout] 152 | |                 .collect::<Vec<_>>(),
[INFO] [stdout] 153 | |         )
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/verify-certificates.rs:47:32
[INFO] [stdout]    |
[INFO] [stdout] 47 |                           panic!(format!(
[INFO] [stdout]    |  ________________________________^
[INFO] [stdout] 48 | |                             " FAIL TO CERTIFICATE: {} => {}",
[INFO] [stdout] 49 | |                             cnf.file_name().unwrap().to_string_lossy(),
[INFO] [stdout] 50 | |                             out.to_string_lossy(),
[INFO] [stdout] 51 | |                         ));
[INFO] [stdout]    | |_________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/verify-certificates.rs:83:32
[INFO] [stdout]    |
[INFO] [stdout] 83 |                           panic!(format!(
[INFO] [stdout]    |  ________________________________^
[INFO] [stdout] 84 | |                             " FAIL TO CONVERT: {} => {}",
[INFO] [stdout] 85 | |                             cnf.file_name().unwrap().to_string_lossy(),
[INFO] [stdout] 86 | |                             grat.to_string_lossy(),
[INFO] [stdout] 87 | |                         ));
[INFO] [stdout]    | |_________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/verify-certificates.rs:106:32
[INFO] [stdout]     |
[INFO] [stdout] 106 |                           panic!(format!(
[INFO] [stdout]     |  ________________________________^
[INFO] [stdout] 107 | |                             " FAIL TO CERTIFICATE: {} => {}",
[INFO] [stdout] 108 | |                             cnf.file_name().unwrap().to_string_lossy(),
[INFO] [stdout] 109 | |                             grat.to_string_lossy(),
[INFO] [stdout] 110 | |                         ));
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/assign/propagate.rs:133:50
[INFO] [stdout]     |
[INFO] [stdout] 133 |         debug_assert!(!self.trail.contains(&!l), format!("{:?}", l));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/assign/var.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 159 |             format!("nav.{}, nv.{}", self.num_asserted_vars, self.num_vars)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cdb/db.rs:585:42
[INFO] [stdout]     |
[INFO] [stdout] 585 |         debug_assert!(!c.is(Flag::DEAD), format!("found {} is dead: {}", cid, c));
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/processor/mod.rs:484:25
[INFO] [stdout]     |
[INFO] [stdout] 484 |                         format!("{} {:?} {}", cid, c, v.index,)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/processor/mod.rs:490:25
[INFO] [stdout]     |
[INFO] [stdout] 490 |                         format!("{} {:?} {}", cid, c, v.index,)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/solver/conflict.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 | /                     format!(
[INFO] [stdout] 71 | |                         "assign stack contains a strange lit: level {}, stack level {}",
[INFO] [stdout] 72 | |                         original_dl, snd_l
[INFO] [stdout] 73 | |                     )
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/solver/conflict.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 | /                     format!(
[INFO] [stdout] 80 | |                         "{} maps to {:?} {:?}: decision {}",
[INFO] [stdout] 81 | |                         c,
[INFO] [stdout] 82 | |                         c.iter().map(|l| asg.assigned(*l)).collect::<Vec<_>>(),
[INFO] [stdout] 83 | |                         c.iter().map(|l| asg.assign(l.vi())).collect::<Vec<_>>(),
[INFO] [stdout] 84 | |                         decision,
[INFO] [stdout] 85 | |                     )
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/solver/conflict.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 | /         format!(
[INFO] [stdout] 146 | |             "use_{}: {:?}, {:?}",
[INFO] [stdout] 147 | |             use_chronobt,
[INFO] [stdout] 148 | |             cl,
[INFO] [stdout] ...   |
[INFO] [stdout] 152 | |                 .collect::<Vec<_>>(),
[INFO] [stdout] 153 | |         )
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.49s
[INFO] running `Command { std: "docker" "inspect" "80a2f777ca0c2467bb86129062498c6767093623e849889d1db28470fda3a395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80a2f777ca0c2467bb86129062498c6767093623e849889d1db28470fda3a395", kill_on_drop: false }`
[INFO] [stdout] 80a2f777ca0c2467bb86129062498c6767093623e849889d1db28470fda3a395