Template instatiation error on compiling

[Fulgen301]

• What is the issue you have?
  I use the json.hpp single-include in a project, but when the compiler tries to compile the file which includes json.hpp, this error occurs:
  https://bpaste.net/show/e5f311ab72ef
• Please describe the steps to reproduce the issue. Can you provide a small but working code example?
  I'm not exactly sure what to fill in here, as the unit tests and examples from the documentation all compile and run without issues and as it's a larger project.
• What is the expected behavior?
  It should compile without errors.
• And what is the actual behavior instead?
  Compiling fails.
• Which compiler and operating system are you using? Is it a supported compiler?
  gcc 8.2.0, Arch Linux (unsupported)
• Did you use a released version of the library or the version from the develop branch?
  I use today's release.
• If you experience a compilation error: can you compile and run the unit tests?
  The unit tests all passed.

[theodelrieu]

Could you post the calling code?

It seems there is a problem with some emplace_back call.

[Fulgen301]

My bad, was a problem with an overseen emplace_back call in my code, no problem with the library.