--dev.pow hangs with "Failed to get free disk space"

[BelfordZ]

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System information

CoreGeth Version: 1.12.1-stable Git Commit: 04d026e226c55216deafadd4e4b06d144922a6e4 Architecture: amd64 Go Version: go1.16.2 Operating System: linux GOPATH= GOROOT=/home/ia/go1.16.2.linux-amd64

Expected behaviour

./geth --dev.pow --http --http.corsdomain "*" --http.vhosts "*" boots and runs normally

Actual behaviour

boots normally, but then hangs on this last log line:

INFO [12-09|12:13:14.949] Commit new mining work                   number=1 sealhash=ad56fd..1a2e3a uncles=0 txs=0 gas=0 fees=0 elapsed="85.168µs"
WARN [12-09|12:13:14.949] Failed to get free disk space            path= err="failed to call Statfs: no such file or directory"