[Code scan] LAMMPS dump box parser crashes on orthogonal boxes

[njzjz]

Source: Codex global repository scan of deepmodeling/dpti at commit b719828.
Project: DeepModeling Agent Code Scan

Problem
dump.get_dumpbox() always reads a third value from each BOX BOUNDS line as a tilt factor. Standard orthogonal LAMMPS dump boxes use only lo hi per axis, so this parser raises IndexError for valid dump files.

Code references

dpti/dpti/lib/dump.py

Line 67 in b719828

def get_dumpbox(lines) :

dpti/dpti/lib/dump.py

Line 72 in b719828

info = [float(jj) for jj in blk[dd].split()]

dpti/dpti/lib/dump.py

Line 75 in b719828

tilt[dd] = info[2]

Reproduction
Parse a dump block with:

ITEM: BOX BOUNDS pp pp pp
0 10
0 10
0 10

Expected result
Orthogonal boxes should parse with zero tilt factors instead of crashing.