sync image race condition with gcc trunk

[zbeekman]

See discussion in #299

[zbeekman]

ATTN: @vehre

I think this could be the cause of the test failure in async_comp_alloc related to an email from @jerryd:

Hi Zaak,

Se below. One failure. Have not see this before. I am going to update gcc trunk
and rebuild and try this again.

  Start  8: register_alloc_comp_2

8/34 Test #8: register_alloc_comp_2 ............ Passed 0.03 sec
Start 9: register_alloc_comp_3
9/34 Test #9: register_alloc_comp_3 ............ Passed 0.03 sec
Start 10: async_comp_alloc
10/34 Test #10: async_comp_alloc .................***Timeout 3.39 sec
Start 11: get_array
11/34 Test #11: get_array ........................ Passed 0.28 sec

Let me know what you think.

[vehre]

This issue has nothing to do with sync images. It is the cause of #260 (the allocation part) not being addressed yet. I therefore advise to close this issue and use #260 for tracking.

[zbeekman]

Ah, yes, my mistake.... I knew about this too.... sorry for the noise.