network: add a nil check in (*TCPTransport).Close, prevent panic #721
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You have to try to trigger that, but in the event of server shutdown before it
actually started listening Close will easily panic like this:
2020-03-05T11:48:08.660+0300 INFO node started {"blockHeight": 6458, "headerHeight": 15605}
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0x9d5f0a]
goroutine 1 [running]:
github.com/nspcc-dev/neo-go/pkg/network.(*TCPTransport).Close(0xc000fd7050)
/home/rik/dev/neo-go/pkg/network/tcp_transport.go:78 +0x2a
github.com/nspcc-dev/neo-go/pkg/network.(*Server).Shutdown(0xc000182280)
/home/rik/dev/neo-go/pkg/network/server.go:190 +0x189
github.com/nspcc-dev/neo-go/cli/server.startServer(0xc000200160, 0x0, 0x0)
/home/rik/dev/neo-go/cli/server/server.go:367 +0x79e
github.com/urfave/cli.HandleAction(0xb84860, 0xccf240, 0xc000200160, 0xc0001c4500, 0x0)
/home/rik/dev/neo-go/vendor/github.com/urfave/cli/app.go:490 +0xc8
github.com/urfave/cli.Command.Run(0xc9a160, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0xca407f, 0x10, 0x0, ...)
/home/rik/dev/neo-go/vendor/github.com/urfave/cli/command.go:210 +0x996
github.com/urfave/cli.(*App).Run(0xc0001d64e0, 0xc0000ca000, 0x3, 0x3, 0x0, 0x0)
/home/rik/dev/neo-go/vendor/github.com/urfave/cli/app.go:255 +0x6af
main.main()
/home/rik/dev/neo-go/cli/main.go:25 +0x505
Codecov Report
@@ Coverage Diff @@
## master #721 +/- ##
==========================================
- Coverage 66.01% 66.01% -0.01%
==========================================
Files 132 132
Lines 11721 11722 +1
==========================================
Hits 7738 7738
- Misses 3637 3638 +1
Partials 346 346
Continue to review full report at Codecov.
|
fyrchik
approved these changes
Mar 5, 2020
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You have to try to trigger that, but in the event of server shutdown before it
actually started listening Close will easily panic like this:
2020-03-05T11:48:08.660+0300 INFO node started {"blockHeight": 6458, "headerHeight": 15605}
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0x9d5f0a]
goroutine 1 [running]:
github.com/nspcc-dev/neo-go/pkg/network.(*TCPTransport).Close(0xc000fd7050)
/home/rik/dev/neo-go/pkg/network/tcp_transport.go:78 +0x2a
github.com/nspcc-dev/neo-go/pkg/network.(*Server).Shutdown(0xc000182280)
/home/rik/dev/neo-go/pkg/network/server.go:190 +0x189
github.com/nspcc-dev/neo-go/cli/server.startServer(0xc000200160, 0x0, 0x0)
/home/rik/dev/neo-go/cli/server/server.go:367 +0x79e
github.com/urfave/cli.HandleAction(0xb84860, 0xccf240, 0xc000200160, 0xc0001c4500, 0x0)
/home/rik/dev/neo-go/vendor/github.com/urfave/cli/app.go:490 +0xc8
github.com/urfave/cli.Command.Run(0xc9a160, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0xca407f, 0x10, 0x0, ...)
/home/rik/dev/neo-go/vendor/github.com/urfave/cli/command.go:210 +0x996
github.com/urfave/cli.(*App).Run(0xc0001d64e0, 0xc0000ca000, 0x3, 0x3, 0x0, 0x0)
/home/rik/dev/neo-go/vendor/github.com/urfave/cli/app.go:255 +0x6af
main.main()
/home/rik/dev/neo-go/cli/main.go:25 +0x505
Problem
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Solution
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