internal/core/export: verify issue 349 is fixed
internal/core/export: verify issue 349 is fixed

Export implements topological sort on fields.

Fixes #349

Change-Id: I5cae07fa99cca83d839f89a79b20fd1ac1d93303
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/7043
Reviewed-by: CUE cueckoo <0f32a827c9a5f00281f936ac78b5ef3ba80a954c@gmail.com>
Reviewed-by: Marcel van Lohuizen <a22d082192f3ccf984644a4f482781f4c2d65180@golang.org>

cuelang/cue