Gmod crash

Gmod keeps on crashing when joining a server and sometimes in a middle of a server

here is my memory dump http://dumps.metastruct.uk.to/dumper.py?dump=hl2_150812_crash_2015_8_24T17_43_26C0.mdmp&key=brvaFua-93H4X0to5NvfQIj4kn6BRQ5EhPiCZbm7g5-2HtZuekmWunFfJBtff1fgef7F4GJAHMQwBTPQ8B3fb5rgliX3rv7I1k0GhQKJdn89vX16tKWMIz38suqjgkq0SyzD_bFF_D9TweEN7E5VopzP6PI4Q4cVlSVl1KUbJtM=

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