[INFO] updating cached repository https://github.com/Proof-Of-Audit/tendermint_rpc_rust
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a65caf108d0f63af1eaa0149ef31a722db542680
[INFO] testing Proof-Of-Audit/tendermint_rpc_rust against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProof-Of-Audit%2Ftendermint_rpc_rust" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Proof-Of-Audit/tendermint_rpc_rust on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Proof-Of-Audit/tendermint_rpc_rust
[INFO] finished tweaking git repo https://github.com/Proof-Of-Audit/tendermint_rpc_rust
[INFO] tweaked toml for git repo https://github.com/Proof-Of-Audit/tendermint_rpc_rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Proof-Of-Audit/tendermint_rpc_rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4d947927f29e8a5c9f0067cbba3d0ef6e2ca0d0edabc14a9786a2cd6a2103462
[INFO] running `"docker" "start" "-a" "4d947927f29e8a5c9f0067cbba3d0ef6e2ca0d0edabc14a9786a2cd6a2103462"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde_json v1.0.9
[INFO] [stderr]    Compiling tendermint_rpc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.60s
[INFO] running `"docker" "inspect" "4d947927f29e8a5c9f0067cbba3d0ef6e2ca0d0edabc14a9786a2cd6a2103462"`
[INFO] running `"docker" "rm" "-f" "4d947927f29e8a5c9f0067cbba3d0ef6e2ca0d0edabc14a9786a2cd6a2103462"`
[INFO] [stdout] 4d947927f29e8a5c9f0067cbba3d0ef6e2ca0d0edabc14a9786a2cd6a2103462
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 14da7ecb57b01b4b51b9d99c8d5afeb75a7f57f7ef930ff62a4a0bff08392292
[INFO] running `"docker" "start" "-a" "14da7ecb57b01b4b51b9d99c8d5afeb75a7f57f7ef930ff62a4a0bff08392292"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rustc-demangle v0.1.6
[INFO] [stderr]    Compiling futures-await-await-macro v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v0.1.10
[INFO] [stderr]    Compiling openssl-sys v0.9.25
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tokio-io v0.1.5
[INFO] [stderr]    Compiling url v1.6.0
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.3
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:64:33
[INFO] [stderr]    |
[INFO] [stderr] 64 |                     proc_macro::TokenNode::Group(delim, (s.0).0)
[INFO] [stderr]    |                                 ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:71:33
[INFO] [stderr]    |
[INFO] [stderr] 71 |                     proc_macro::TokenNode::Op(ch, kind)
[INFO] [stderr]    |                                 ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:74:33
[INFO] [stderr]    |
[INFO] [stderr] 74 |                     proc_macro::TokenNode::Term((s.0).0)
[INFO] [stderr]    |                                 ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:77:33
[INFO] [stderr]    |
[INFO] [stderr] 77 |                     proc_macro::TokenNode::Literal((l.0).0)
[INFO] [stderr]    |                                 ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:125:29
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 proc_macro::TokenNode::Group(delim, s) => {
[INFO] [stderr]     |                             ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:134:29
[INFO] [stderr]     |
[INFO] [stderr] 134 |                 proc_macro::TokenNode::Op(ch, kind) => {
[INFO] [stderr]     |                             ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:141:29
[INFO] [stderr]     |
[INFO] [stderr] 141 |                 proc_macro::TokenNode::Term(s) => {
[INFO] [stderr]     |                             ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:144:29
[INFO] [stderr]     |
[INFO] [stderr] 144 |                 proc_macro::TokenNode::Literal(l) => {
[INFO] [stderr]     |                             ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `Term` in `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:274:26
[INFO] [stderr]     |
[INFO] [stderr] 274 |         Term(proc_macro::Term::intern(string))
[INFO] [stderr]     |                          ^^^^ could not find `Term` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `TokenNode` in `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:361:21
[INFO] [stderr]     |
[INFO] [stderr] 361 |         proc_macro::TokenNode::Literal(l) => l,
[INFO] [stderr]     |                     ^^^^^^^^^ could not find `TokenNode` in `proc_macro`
[INFO] [stderr] 
[INFO] [stderr] error[E0574]: expected struct, variant or union type, found enum `proc_macro::TokenTree`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:54:21
[INFO] [stderr]    |
[INFO] [stderr] 54 |         TokenStream(proc_macro::TokenTree {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^ not a struct, variant or union type
[INFO] [stderr]    |
[INFO] [stderr] help: consider importing this struct instead
[INFO] [stderr]    |
[INFO] [stderr] 1  | use TokenTree;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `TokenTreeIter` in crate `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:103:38
[INFO] [stderr]     |
[INFO] [stderr] 103 |   pub struct TokenTreeIter(proc_macro::TokenTreeIter);
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: an enum with a similar name exists
[INFO] [stderr]     |
[INFO] [stderr] 103 | pub struct TokenTreeIter(proc_macro::TokenTree);
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] help: consider importing one of these items
[INFO] [stderr]     |
[INFO] [stderr] 1   | use TokenTreeIter;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use imp::TokenTreeIter;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Term` in crate `proc_macro`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:270:29
[INFO] [stderr]     |
[INFO] [stderr] 270 | pub struct Term(proc_macro::Term);
[INFO] [stderr]     |                             ^^^^ not found in `proc_macro`
[INFO] [stderr]     |
[INFO] [stderr] help: consider importing one of these items
[INFO] [stderr]     |
[INFO] [stderr] 1   | use Term;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use imp::Term;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/lib.rs:22:34
[INFO] [stderr]    |
[INFO] [stderr] 22 | #![cfg_attr(feature = "nightly", feature(proc_macro))]
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `empty` found for struct `proc_macro::TokenStream` in the current scope
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:18:46
[INFO] [stderr]    |
[INFO] [stderr] 18 |         TokenStream(proc_macro::TokenStream::empty())
[INFO] [stderr]    |                                              ^^^^^ function or associated item not found in `proc_macro::TokenStream`
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:225:14
[INFO] [stderr]     |
[INFO] [stderr] 225 |         Span(proc_macro::Span::def_site())
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54724 <https://github.com/rust-lang/rust/issues/54724> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `float` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:318:38
[INFO] [stderr]     |
[INFO] [stderr] 318 |         Literal(proc_macro::Literal::float(s))
[INFO] [stderr]     |                                      ^^^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `integer` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:322:38
[INFO] [stderr]     |
[INFO] [stderr] 322 |         Literal(proc_macro::Literal::integer(s.into()))
[INFO] [stderr]     |                                      ^^^^^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0609]: no field `kind` on type `proc_macro::TokenTree`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:360:46
[INFO] [stderr]     |
[INFO] [stderr] 360 |     match stream.into_iter().next().unwrap().kind {
[INFO] [stderr]     |                                              ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `u8` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:377:5
[INFO] [stderr]     |
[INFO] [stderr] 377 |     u8, u16, u32, u64, usize,
[INFO] [stderr]     |     ^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `u16` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:377:9
[INFO] [stderr]     |
[INFO] [stderr] 377 |     u8, u16, u32, u64, usize,
[INFO] [stderr]     |         ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `u32` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:377:14
[INFO] [stderr]     |
[INFO] [stderr] 377 |     u8, u16, u32, u64, usize,
[INFO] [stderr]     |              ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `u64` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:377:19
[INFO] [stderr]     |
[INFO] [stderr] 377 |     u8, u16, u32, u64, usize,
[INFO] [stderr]     |                   ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `usize` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:377:24
[INFO] [stderr]     |
[INFO] [stderr] 377 |     u8, u16, u32, u64, usize,
[INFO] [stderr]     |                        ^^^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `i8` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:378:5
[INFO] [stderr]     |
[INFO] [stderr] 378 |     i8, i16, i32, i64, isize,
[INFO] [stderr]     |     ^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `i16` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:378:9
[INFO] [stderr]     |
[INFO] [stderr] 378 |     i8, i16, i32, i64, isize,
[INFO] [stderr]     |         ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `i32` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:378:14
[INFO] [stderr]     |
[INFO] [stderr] 378 |     i8, i16, i32, i64, isize,
[INFO] [stderr]     |              ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `i64` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:378:19
[INFO] [stderr]     |
[INFO] [stderr] 378 |     i8, i16, i32, i64, isize,
[INFO] [stderr]     |                   ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `isize` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:378:24
[INFO] [stderr]     |
[INFO] [stderr] 378 |     i8, i16, i32, i64, isize,
[INFO] [stderr]     |                        ^^^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `f32` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:392:5
[INFO] [stderr]     |
[INFO] [stderr] 392 |     f32, f64,
[INFO] [stderr]     |     ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `f64` found for struct `proc_macro::Literal` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.1.10/src/unstable.rs:392:10
[INFO] [stderr]     |
[INFO] [stderr] 392 |     f32, f64,
[INFO] [stderr]     |          ^^^ function or associated item not found in `proc_macro::Literal`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 31 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0433, E0554, E0574, E0599, E0609, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `proc-macro2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.6.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0713`.
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "14da7ecb57b01b4b51b9d99c8d5afeb75a7f57f7ef930ff62a4a0bff08392292"`
[INFO] running `"docker" "rm" "-f" "14da7ecb57b01b4b51b9d99c8d5afeb75a7f57f7ef930ff62a4a0bff08392292"`
[INFO] [stdout] 14da7ecb57b01b4b51b9d99c8d5afeb75a7f57f7ef930ff62a4a0bff08392292