error: Could not compile `mozjs`.

[hubertmok]

During compile servo project on ubuntu 16.04, it show the following error message:

---

warning: redundant linker flag specified for library stdc++

error[E0277]: the trait bound `u8: std::convert::From<rust::MutableHandle<'_, u8>>` is not satisfied
    --> /home/hubert/.cargo/registry/src/github.com-1ecc6299db9ec823/mozjs-0.9.1/src/rust.rs:1205:52
     |
1205 |             wrap!(@inner $saved <> ($($acc,)* $arg.into(),) <> $($rest)*);
     |                                                    ^^^^ the trait `std::convert::From<rust::MutableHandle<'_, u8>>` is not implemented for `u8`
     | 
    ::: /home/hubert/.cargo/registry/src/github.com-1ecc6299db9ec823/mozjs-0.9.1/src/jsapi_wrappers.in:44:1
     |
44   | wrap!(jsapi: pub fn FinishMultiOffThreadScriptsDecoder(cx: *mut JSContext, token: *mut ::std::os::raw::c_void, scripts: MutableHandle<ScriptVector>) -> bool);
     | -------------------------------------------------------------------------------------------------------------------------------------------------------------- in this macro invocation
     |
     = help: the following implementations were found:
               <u8 as std::convert::From<bool>>
     = note: required because of the requirements on the impl of `std::convert::Into<u8>` for `rust::MutableHandle<'_, u8>`

error[E0277]: the trait bound `u8: std::convert::From<rust::MutableHandle<'_, u8>>` is not satisfied
    --> /home/hubert/.cargo/registry/src/github.com-1ecc6299db9ec823/mozjs-0.9.1/src/rust.rs:1348:113
     |
1348 |             wrap!(@inner $saved <> ($($declargs)* $arg: &mut MutableHandle<$gentype> , )  <> ($($acc,)* (*$arg).into(),) <> $($rest)*);
     |                                                                                                                 ^^^^ the trait `std::convert::From<rust::MutableHandle<'_, u8>>` is not implemented for `u8`
     | 
    ::: /home/hubert/.cargo/registry/src/github.com-1ecc6299db9ec823/mozjs-0.9.1/src/jsapi_wrappers.in:44:1
     |
44   | wrap!(jsapi: pub fn FinishMultiOffThreadScriptsDecoder(cx: *mut JSContext, token: *mut ::std::os::raw::c_void, scripts: MutableHandle<ScriptVector>) -> bool);
     | -------------------------------------------------------------------------------------------------------------------------------------------------------------- in this macro invocation
     |
     = help: the following implementations were found:
               <u8 as std::convert::From<bool>>
     = note: required because of the requirements on the impl of `std::convert::Into<u8>` for `rust::MutableHandle<'_, u8>`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.
The following warnings were emitted during compilation:

warning: src/jsglue.cpp: In function ‘void DeleteCompileOptions(JS::ReadOnlyCompileOptions*)’:
warning: src/jsglue.cpp:586:57: warning: deleting object of polymorphic class type ‘JS::OwningCompileOptions’ which has non-virtual destructor might cause undefined behaviour [-Wdelete-non-virtual-dtor]
warning:      delete static_cast<JS::OwningCompileOptions *>(aOpts);
warning:                                                          ^
warning: At global scope:
warning: cc1plus: warning: unrecognized command line option ‘-Wno-return-type-c-linkage’
warning: cc1plus: warning: unrecognized command line option ‘-Wno-c++0x-extensions’

error: Could not compile `mozjs`.
warning: build failed, waiting for other jobs to finish...
error: build failed
[Warning] Could not generate notification! Optional Python module 'dbus' is not installed.
Build FAILED in 0:27:14

[jdm]

This happens when the installed version of rustfmt is too old.

[hubertmok]

I have updated the rustfmt to version 0.99.4-nightly and still have this issue

[hubertmok]

Thx @jdm, after update clang version, it works