deepcopy is broken for SharedArrays #6362
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carlobaldassi opened this Issue on Apr 1, 2014 · 1 comment
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@carlobaldassi
The Julia Language member
carlobaldassi commented on Apr 1, 2014

In particular, trying to assign elements from a different process silently fails.

julia> a
3x4 SharedArray{Float64,2}:
 -0.978909   0.956941  -0.727437   0.123889 
  1.52651   -0.524361  -0.69585   -0.0347904
  0.556024   1.01309    0.724335  -1.39348  

julia> b = deepcopy(a)
3x4 SharedArray{Float64,2}:
 -0.978909   0.956941  -0.727437   0.123889 
  1.52651   -0.524361  -0.69585   -0.0347904
  0.556024   1.01309    0.724335  -1.39348  

julia> remotecall_fetch(2, setindex!, b, 5, 4:6)
3x4 SharedArray{Float64,2}:
 -0.978909  5.0  -0.727437   0.123889 
  1.52651   5.0  -0.69585   -0.0347904
  0.556024  5.0   0.724335  -1.39348  

julia> b
3x4 SharedArray{Float64,2}:
 -0.978909   0.956941  -0.727437   0.123889 
  1.52651   -0.524361  -0.69585   -0.0347904
  0.556024   1.01309    0.724335  -1.39348  

@carlobaldassi carlobaldassi added bug parallel labels on Apr 1, 2014
@carlobaldassi
The Julia Language member
carlobaldassi commented on Apr 1, 2014

Oh and worse than what is described above, the assignment acts on the original array:

julia> a
3x4 SharedArray{Float64,2}:
 -0.978909  5.0  -0.727437   0.123889 
  1.52651   5.0  -0.69585   -0.0347904
  0.556024  5.0   0.724335  -1.39348  

@carlobaldassi carlobaldassi added a commit that closed this issue on Apr 1, 2014
	@carlobaldassi 	Fix #6362 (deepcopy broken for SharedArrays) 			beb4398
@carlobaldassi carlobaldassi closed this in beb4398 on Apr 1, 2014
This was referenced on Sep 6, 2015
Merged
Fix sharedarray indexing regression #12964
Merged