[INFO] fetching crate duplicate 0.2.9...
[INFO] checking duplicate-0.2.9 against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] extracting crate duplicate 0.2.9 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate duplicate 0.2.9 on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate duplicate 0.2.9
[INFO] finished tweaking crates.io crate duplicate 0.2.9
[INFO] tweaked toml for crates.io crate duplicate 0.2.9 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded macrotest v1.0.5
[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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", 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] baf8a4dba542cdf68b156306b87368ecb1092aea94791cc016eb9da9527e33f1
[INFO] running `Command { std: "docker" "start" "-a" "baf8a4dba542cdf68b156306b87368ecb1092aea94791cc016eb9da9527e33f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "baf8a4dba542cdf68b156306b87368ecb1092aea94791cc016eb9da9527e33f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baf8a4dba542cdf68b156306b87368ecb1092aea94791cc016eb9da9527e33f1", kill_on_drop: false }`
[INFO] [stdout] baf8a4dba542cdf68b156306b87368ecb1092aea94791cc016eb9da9527e33f1
[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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 082bde2367c8402ea497403c4f64856b685a764279e384cb2b378be87f0a56bb
[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" "082bde2367c8402ea497403c4f64856b685a764279e384cb2b378be87f0a56bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking convert_case v0.4.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking duplicate v0.2.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/substitute.rs:234:14
[INFO] [stdout]     |
[INFO] [stdout] 234 |                           panic!(format!(
[INFO] [stdout]     |  ________________________________^
[INFO] [stdout] 235 | |                             "Substitution identifier '{}' takes {} arguments but was supplied \
[INFO] [stdout] 236 | |                              with none.",
[INFO] [stdout] 237 | |                             ident.to_string(),
[INFO] [stdout] 238 | |                             subst.arg_count
[INFO] [stdout] 239 | |                         ))
[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: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 234 |                         panic!(
[INFO] [stdout] 235 |                             "Substitution identifier '{}' takes {} arguments but was supplied \
[INFO] [stdout] 236 |                              with none.",
[INFO] [stdout] 237 |                             ident.to_string(),
[INFO] [stdout] 238 |                             subst.arg_count
[INFO] [stdout] 239 |                         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/substitute.rs:234:14
[INFO] [stdout]     |
[INFO] [stdout] 234 |                           panic!(format!(
[INFO] [stdout]     |  ________________________________^
[INFO] [stdout] 235 | |                             "Substitution identifier '{}' takes {} arguments but was supplied \
[INFO] [stdout] 236 | |                              with none.",
[INFO] [stdout] 237 | |                             ident.to_string(),
[INFO] [stdout] 238 | |                             subst.arg_count
[INFO] [stdout] 239 | |                         ))
[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: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 234 |                         panic!(
[INFO] [stdout] 235 |                             "Substitution identifier '{}' takes {} arguments but was supplied \
[INFO] [stdout] 236 |                              with none.",
[INFO] [stdout] 237 |                             ident.to_string(),
[INFO] [stdout] 238 |                             subst.arg_count
[INFO] [stdout] 239 |                         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking macrotest v1.0.5
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/utils.rs:107:14
[INFO] [stdout]     |
[INFO] [stdout] 107 |                         panic!(format!("Error accessing source file: {:?}", file))
[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: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 107 |                         panic!("Error accessing source file: {:?}", file)
[INFO] [stdout]     |                               --                                       --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/default_features/mod.rs:35:25
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 assert!(IS_DEFAULT, format!("Feature '{}' is not enabled by default.", $feature_string));
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 | default_features!(pretty_errors "pretty_errors");
[INFO] [stdout]    | ------------------------------------------------- in this macro invocation
[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: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 assert!(IS_DEFAULT, "Feature '{}' is not enabled by default.", $feature_string);
[INFO] [stdout]    |                                    --                                                        --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/default_features/mod.rs:35:25
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 assert!(IS_DEFAULT, format!("Feature '{}' is not enabled by default.", $feature_string));
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 | default_features!(module_disambiguation "module_disambiguation");
[INFO] [stdout]    | ----------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 assert!(IS_DEFAULT, "Feature '{}' is not enabled by default.", $feature_string);
[INFO] [stdout]    |                                    --                                                        --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/utils.rs:107:14
[INFO] [stdout]     |
[INFO] [stdout] 107 |                         panic!(format!("Error accessing source file: {:?}", file))
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 107 |                         panic!("Error accessing source file: {:?}", file)
[INFO] [stdout]     |                               --                                       --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[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/substitute.rs:234:14
[INFO] [stdout]     |
[INFO] [stdout] 234 |                           panic!(format!(
[INFO] [stdout]     |  ________________________________^
[INFO] [stdout] 235 | |                             "Substitution identifier '{}' takes {} arguments but was supplied \
[INFO] [stdout] 236 | |                              with none.",
[INFO] [stdout] 237 | |                             ident.to_string(),
[INFO] [stdout] 238 | |                             subst.arg_count
[INFO] [stdout] 239 | |                         ))
[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: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 234 |                         panic!(
[INFO] [stdout] 235 |                             "Substitution identifier '{}' takes {} arguments but was supplied \
[INFO] [stdout] 236 |                              with none.",
[INFO] [stdout] 237 |                             ident.to_string(),
[INFO] [stdout] 238 |                             subst.arg_count
[INFO] [stdout] 239 |                         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.06s
[INFO] running `Command { std: "docker" "inspect" "082bde2367c8402ea497403c4f64856b685a764279e384cb2b378be87f0a56bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "082bde2367c8402ea497403c4f64856b685a764279e384cb2b378be87f0a56bb", kill_on_drop: false }`
[INFO] [stdout] 082bde2367c8402ea497403c4f64856b685a764279e384cb2b378be87f0a56bb