tree b217e172db1ac16bbfa1cf6be0eb0cc40fff0695
parent 6165736e34f90a500a208cb2f493e3e0c7b2e6aa
author Marcel van Lohuizen <mpvl@golang.org> 1605438225 +0100
committer Marcel van Lohuizen <mpvl@golang.org> 1605449813 +0000

internal/core/cue: fix hang on cycles in embeddings in comprehensions

Fixes a failure to pass down cycle information down environments
for comprehensions.

Also preserves the Vertex pointer by introducing an indirection
and resolving this again in resolution. Pointer identity is used
in cycle detection, so this approach caused this to break.

Fixes #587

Change-Id: I0febf03f3c96fdfcccf427ccb45534e2242c3aae
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/7621
Reviewed-by: CUE cueckoo <cueckoo@gmail.com>
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>