 --> [ local path prefix ]/cycles/constant_2.fpp:3:3
  |
3 |   constant a = b
  |   ^^^^^^^^^^^^^^ encountered symbol use-definition cycle
  |
 ::: [ local path prefix ]/cycles/constant_2.fpp:7:10
  |
7 | constant b = M.a
  |          - defined here
  |
 ::: [ local path prefix ]/cycles/constant_2.fpp:7:14
  |
7 | constant b = M.a
  |              --- used here

