error generating stdlib in json

[UtherII]

When i try to generate the stdlib in json format, I get a panic :

$ rustdoc -o ~/jsondoc -w json lib.rs 
thread '<unnamed>' panicked at 'Rust generated JSON is invalid: SyntaxError(EOFWhileParsingObject, 1, 16591770)', src/libcore/result.rs:746
stack backtrace:
   1:     0x7faf69d6d330 - std::sys::backtrace::tracing::imp::write::h3152d690c5b90b0c
   2:     0x7faf69d7a9fb - std::panicking::default_hook::_$u7b$$u7b$closure$u7d$$u7d$::hb638acea7c29901b
   3:     0x7faf69d7a62e - std::panicking::default_hook::h508c3dab3df347d6
   4:     0x7faf69d3e32f - std::sys_common::unwind::begin_unwind_inner::h5cd31b1580026517
   5:     0x7faf69d40418 - std::sys_common::unwind::begin_unwind_fmt::h5d8ad4b339509f9d
   6:     0x7faf69d6aa01 - rust_begin_unwind
   7:     0x7faf69ddb22f - core::panicking::panic_fmt::h813eaa27a5810609
   8:     0x7faf6a35d639 - core::result::unwrap_failed::h670a1e09f7460ca6
   9:     0x7faf6a2a0f2a - rustdoc::main_args::h8956ea1c04388a7f
  10:     0x7faf6a29ad7a - std::sys_common::unwind::try::try_fn::hde24304b9a3cc91a
  11:     0x7faf69d6a98b - __rust_try
  12:     0x7faf69d6a91d - std::sys_common::unwind::inner_try::h0adf4a3bf383b17e
  13:     0x7faf6a29b1b8 - _<F as alloc..boxed..FnBox<A>>::call_box::hcf7fef0db7df236b
  14:     0x7faf69d78bc4 - std::sys::thread::Thread::new::thread_start::h8dfc0bc1e9d1f51d
  15:     0x7faf62cbc6a9 - start_thread
  16:     0x7faf699cbe9c - clone
  17:                0x0 - <unknown>

I am using Nighly

[mitaa]

This is probably #25108. I've been meaning to take a look at this...

[UtherII]

Indeed, this issue is a duplicate. I had found issue #25108 before posting mine, but I only read the first part about compilation error.