libstdc++/10809: [3.3 regression] mips-sgi-irix6.5 libstdc++-v3 testsuite execution failure in 27_io/istream_unformatted.cc

[Paolo Carlini]

Thanks Eric.

Now, in order to make further progress, I have to ask you to debug a bit 
that call (*): perhaps 'ioctl' returns zero (success) but __num is 
unexpectedly zero too? Or is 'poll' to fail? Or, finally, 'fstat' 
behaves unexpectedly?

Thanks in advance,
Paolo.

(*) Just copy the whole test file (together with the required 
'istream_unformatted-1.tst') and replace <testsuite_hooks.h> by 
<cassert> and each VERIFY by assert. Then build and step into that 
in_avail call.