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lattice / quda

QUDA is a library for performing calculations in lattice QCD on GPUs.
https://lattice.github.io/quda
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QIO_string_ptr causes a segfault when loading some Chroma gauge fields #936

Open weinbe2 opened 4 years ago

weinbe2 commented 4 years ago

With some gauge fields generated by Chroma, calling QDP_string_ptr on the XML from the gauge field record (as opposed to the overall file) leads to a segfault. This, in particular, happens on line ~112 of lib/qio_field.cpp.

For now there's a WAR in place for gauge fields since I've never hit this issue with spinor fields (and MILC has also successfully read spinor fields generated by QUDA), which suggests this is a "narrow" issue.

So far as I can tell this is an issue with the way these gauge fields were written by QIO in the first place (via QDP++), but I haven't nailed it down yet---I haven't hit this issue with any files written by QUDA, and there's been success loading files written by QUDA into MILC. Anyway, further debugging abounds.

weinbe2 commented 4 years ago

@bjoo I can take point on this, but I wanted to tag you for awareness.