#5 Segmentation fault when reading AppBlock in Perl

[Hadmut Danisch]

The Perl code sometimes crashes with a segmentation fault
when trying to read an Application Block out of a database
file without such a block.

The reason might be:

In Pilot.xs, Function getAppBlock, Line 3654,
the AppBlock is read:

result = pi_file_get_app_info(self->pf, &buf, &len);
ReturnReadAI(buf, len);

The Macro ReturnReadAI (Line 440) checks the variable result
before accessing the AppBlock.

pi_file_get_app_info (pi-file.c, line 366) always return 0.

There definitely something wrong, either in the perl code
or in the C library.