unifyfs-stage fails to transfer in Travis; not on real machines
@craigsteffen is already working on this.
Since Jun 18, 2020.
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Description
### System information
Type | Version/Name
--- | ---
Operating System |
OS Version |
Architecture | Travis build environment
UnifyFS Version | dev on 2020jun18
### Describe the problem you're observing
The unit test 0700 fails when unifyfs-stage tries to transfer the file out of the unifyfs file system.
### Describe how to reproduce the problem
Just put test 0700 in without "expect fail" and it will fail the overall tests.
### Include any warning or errors or releveant debugging data
Here's the error message given by unifyfs-stage:
```
failed to transfer file (src=/tmp/tmp.FaQ7lHYYg4/mount/intermediate.file, dst=/tmp/tmp.FaQ7lHYYg4/stage_destination_0700/destination_0700.file): Bad file descriptor
data transfer failed (Bad file descriptor)
```
I have run these same tests on summitdev and Cameron has run them on one of the machines at Livermore, and they run fine. Somehow the Travis environment is tripping something up.
I'm creating this issue as a to-do to track this down.
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