CUSolver finalizer tries to take ReentrantLock

[vchuravy]

CUDA.jl/lib/cusolver/CUSOLVER.jl

Line 63 in d3b1363

push!(idle_dense_handles, cuda.context, new_handle) do

Maybe we could use a lock-free queue instead?

error in running finalizer: ErrorException("task switch not allowed from inside gc finalizer")
ijl_error at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/rtutils.c:41
ijl_switch at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/task.c:530
try_yieldto at ./task.jl:861
wait at ./task.jl:931
wait at ./condition.jl:124
slowlock at ./lock.jl:112
lock at ./lock.jl:103 [inlined]
lock at ./lock.jl:183
push! at /home/vchuravy/.julia/packages/CUDA/HzJ3E/lib/utils/cache.jl:55 [inlined]
#1559 at /home/vchuravy/.julia/packages/CUDA/HzJ3E/lib/cusolver/CUSOLVER.jl:63
unknown function (ip: 0x7ff3d86cfe82)
_jl_invoke at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/gf.c:2367 [inlined]
ijl_apply_generic at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/gf.c:2549
jl_apply at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/julia.h:1839 [inlined]
run_finalizer at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/gc.c:280
jl_gc_run_finalizers_in_list at /cache/build/default-amdci4-6/julialang/julia-release-1-dot-8/src/gc.c:367

cc: @evelyne-ringoot

[maleadt]

This has been fixed by the recent handlecache rework.