Fix: Resolve head ambiguity and prevent UndefVarError and precompilation failure
#1971
| Job | Run time |
|---|---|
| 36m 58s | |
| 33m 2s | |
| 20s | |
| 19m 10s | |
| 12m 41s | |
| 18s | |
| 1h 42m 29s |