forked from Lephenixnoir/PythonExtra
acfbb9febd
Prior to this patch the amount of free space in an array (including bytearray) was not being maintained correctly for the case of slice assignment which changed the size of the array. Under certain cases (as encoded in the new test) it was possible that the array could grow beyond its allocated memory block and corrupt the heap. Fixes issue #4127.
69 lines
1.2 KiB
Python
69 lines
1.2 KiB
Python
try:
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bytearray()[:] = bytearray()
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except TypeError:
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print("SKIP")
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raise SystemExit
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# test slices; only 2 argument version supported by MicroPython at the moment
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x = bytearray(range(10))
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# Assignment
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l = bytearray(x)
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l[1:3] = bytearray([10, 20])
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print(l)
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l = bytearray(x)
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l[1:3] = bytearray([10])
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print(l)
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l = bytearray(x)
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l[1:3] = bytearray()
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print(l)
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l = bytearray(x)
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#del l[1:3]
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print(l)
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l = bytearray(x)
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l[:3] = bytearray([10, 20])
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print(l)
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l = bytearray(x)
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l[:3] = bytearray()
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print(l)
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l = bytearray(x)
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#del l[:3]
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print(l)
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l = bytearray(x)
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l[:-3] = bytearray([10, 20])
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print(l)
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l = bytearray(x)
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l[:-3] = bytearray()
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print(l)
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l = bytearray(x)
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#del l[:-3]
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print(l)
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# slice assignment that extends the array
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b = bytearray(2)
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b[2:] = bytearray(10)
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print(b)
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b = bytearray(10)
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b[:-1] = bytearray(500)
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print(len(b), b[0], b[-1])
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# extension with self on RHS
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b = bytearray(x)
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b[4:] = b
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print(b)
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# Assignment of bytes to array slice
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b = bytearray(2)
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b[1:1] = b"12345"
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print(b)
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# Growth of bytearray via slice extension
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b = bytearray(b'12345678')
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b.append(57) # expand and add a bit of unused space at end of the bytearray
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for i in range(400):
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b[-1:] = b'ab' # grow slowly into the unused space
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print(len(b), b)
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