BUG: read_csv (c engine, round_trip precision) platform inconsistency with large exponents

[mzeitlin11]

On OS X

data = io.StringIO("data\n10E999")
pd.read_csv(data, engine="c", float_precision="round_trip")

gives

   data
0   inf

But on Linux this gives

     data
0  10E999

Is this expected for any reason?

[phofl]

The following is in the same place:

s = """
Col1,Col2
a1,50060e8007123400
a2,50060e8007123400
a3,50060e8007123400
a4,50060e8007123402
a5,50060e8007123402
a6,50060e8007123402
a7,50060e8007123402
a8,50060e8007123402
a9,50060e8007123404
a10,50060e8007123404
"""

output_csv = pd.read_csv(StringIO(s))

returns

  Col1  Col2
0   a1   0.0
1   a2   0.0
2   a3   0.0
3   a4   0.0
4   a5   0.0
5   a6   0.0
6   a7   0.0
7   a8   0.0
8   a9   0.0
9  a10   0.0