Bernie Hackett wrote: "Feel free to close this won't fix, but given that this appears to be the second report of this issue for 3.5 (see issue22971) ..."

It's not because you get the same error message that the root cause is the same.

Martin Panter wrote: "I saw this error recently on some 3.4 builtbots: (...)  AMD64 Windows10 3.4"

Again, the root cause can be very different. If you want to work on this crash, please open a separated issue for this specific crash on test_json. The code on Windows can be a little bit different, and ceval.c evolved between Python 3.4 and 3.6.