[Bug middle-end/96032] RFE: add a way to use output from --fdiagnostics-format=json as input

[dmalcolm at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96032

--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I posted a prototype implementation of this here:
  "[PATCH 00/12] RFC: Replay of serialized diagnostics"
    https://gcc.gnu.org/pipermail/gcc-patches/2022-June/597051.html

(doesn't fully work; see the many caveats in that post)