Haik Lorenz 7353d25c13 Prevent failing stringstream to crash the export process ...

Text exporters are using string streams to hold the file content first and then write them to the file in a single pass. If for whatever reason the stream has the fail bit set, tellp() will return pos_type(-1), which in turn makes the subsequent write crash - at least on Windows systems. One reason for the stream being in fail state is when its size exceeds 2^31 bytes, even on 64-bit systems (i.e., when very large scenes get exported).

The fix is checking the fail() before even opening the file.

2017-10-09 15:47:17 +02:00

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