tests/extmod/vfs_fat_finaliser.py: Ensure alloc at never-used GC blocks.
Prevents the finaliser from being missed if there's a dangling reference on the stack to one of the blocks for the files (that this test checks that they get finalised). See github.com/micropython/micropython/pull/7659#issuecomment-899479793 Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
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@ -56,6 +56,13 @@ micropython.heap_unlock()
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# Here we test that the finaliser is actually called during a garbage collection.
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import gc
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# Do a large number of single-block allocations to move the GC head forwards,
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# ensuring that the files are allocated from never-before-used blocks and
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# therefore couldn't possibly have any references to them left behind on
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# the stack.
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for i in range(1024):
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[]
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N = 4
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for i in range(N):
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n = "x%d" % i
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