r.random fails with bus error on Mac OS X 10.5

[cmbarton]

I just learned that r.random fails completely on OS X 10.5. It is working on my OS X 10.4 PowerBook. it fails to create either raster or vector points and exits with a bus error. Try making points from the Spearfish elevation.10m map.

Michael

[kyngchaos]

verified bus error on Leopard and OK on tiger, SVN 3/8. Here is the thread trace from the crashlog:

Thread 0 Crashed:
0   r.random                      	0x000021a7 set_max + 103
1   r.random                      	0x00002498 get_stats + 686
2   r.random                      	0x00002898 main + 615
3   r.random                      	0x0000206a start + 54

[glynn]

Replying to kyngchaos:

verified bus error on Leopard and OK on tiger, SVN 3/8. Here is the thread trace from the crashlog:

Thread 0 Crashed:
0   r.random                      	0x000021a7 set_max + 103
1   r.random                      	0x00002498 get_stats + 686

I don't know if it's related to the crash, but the way that the RASTER_PTR union is used in get_stats violates ANSI C aliasing rules. Specifically, the code stores a pointer in data.v but then uses data.[cfd]. Because those fields have different types, the compiler is entitled to treat the fields as distinct, even though they overlap. E.g. if it has a copy of data.c in a register, and you modify data.v, references to data.c may still use the value stored in the register.

As for the crash, we really need at least a proper backtrace with argument values, and ideally the values of any relevant variables.

[kyngchaos]

Just tested on current SVN and no crash. Michael?

[cmbarton]

Tested with GRASS 6.4. No problems