rustc-ap-syntax_pos 4.0.0

# rustc version
rustc 1.22.0-dev (b1cfd1750 2017-09-21)
# docs.rs version
cratesfyi 0.4.2 (13da7b2 2017-10-12)

# build log
Updating registry `https://github.com/rust-lang/crates.io-index`
Downloading rustc-ap-syntax_pos v4.0.0
Downloading rustc-ap-rustc_data_structures v4.0.0
Downloading rustc-ap-serialize v4.0.0
Fresh term v0.4.6
Fresh libc v0.2.35
Fresh unicode-width v0.1.4
Fresh stable_deref_trait v1.0.0
Fresh smallvec v0.6.0
Fresh cfg-if v0.1.2
Fresh rand v0.3.20
Compiling rustc-ap-serialize v4.0.0
Fresh owning_ref v0.3.3
Fresh log v0.4.1
Fresh parking_lot_core v0.2.10
Running `rustc --crate-name serialize .cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-4.0.0/lib.rs --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=0ff8c334fb61b20a -C extra-filename=-0ff8c334fb61b20a --out-dir /home/cratesfyi/cratesfyi/debug/deps -L dependency=/home/cratesfyi/cratesfyi/debug/deps --extern term=/home/cratesfyi/cratesfyi/debug/deps/libterm-ebf2d46f2c9791bb.rlib --extern-version term=term,0.4.6 --cap-lints allow`
Fresh parking_lot v0.5.3
error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
--> .cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-4.0.0/json.rs:1055:22
|
1055 |             target = target.find(*key)?;
|                      ------------------
|                      |
|                      the `?` operator cannot be applied to type `std::option::Option<&json::Json>`
|                      in this macro invocation
|
= help: the trait `std::ops::Try` is not implemented for `std::option::Option<&json::Json>`
= note: required by `std::ops::Try::into_result`

error: aborting due to previous error

thread 'main' panicked at 'ChainedError {
error: Could not compile `rustc-ap-serialize`.,
cause: process didn't exit successfully: `rustc --crate-name serialize .cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-4.0.0/lib.rs --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=0ff8c334fb61b20a -C extra-filename=-0ff8c334fb61b20a --out-dir /home/cratesfyi/cratesfyi/debug/deps -L dependency=/home/cratesfyi/cratesfyi/debug/deps --extern term=/home/cratesfyi/cratesfyi/debug/deps/libterm-ebf2d46f2c9791bb.rlib --extern-version term=term,0.4.6 --cap-lints allow` (exit code: 101)
}', src/bin/cratesfyi.rs:142
note: Run with `RUST_BACKTRACE=1` for a backtrace.