| error type,count,% of test set | |
| degenerate repetition (4-gram repeated ≥2x),4,0.26 | |
| source copied verbatim,0,0.0 | |
| empty output,0,0.0 | |
| severe under-generation (ratio < 0.5),26,1.71 | |
| severe over-generation (ratio > 2.0),8,0.52 | |
| near-miss (60 ≤ chrF < 90),342,22.44 | |
| hard failure (chrF < 20),306,20.08 | |