Feb 21 14:37:06 localhost.localdomain isulad[65087]: panic: runtime error: invalid memory address or nil pointer dereference
Feb 21 14:37:06 localhost.localdomain isulad[65087]: [signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0xaaaad2a88d44]
Feb 21 14:37:06 localhost.localdomain isulad[65087]: goroutine 283 [running]:
Feb 21 14:37:06 localhost.localdomain isulad[65087]: main.GetDiskUsageStats.func1(0x40004b7880, 0x6a, 0x0, 0x0, 0xaaaad2ed9c20, 0x40009b72f0, 0x20, 0xaaaad2e15140)
Feb 21 14:37:06 localhost.localdomain isulad[65087]:         /root/work/bugfix/kata/patch/iSulad-img/cmd/isulad_img/filesystem.go:29 +0x54
Feb 21 14:37:06 localhost.localdomain isulad[65087]: path/filepath.Walk(0x40004b7880, 0x6a, 0x40007e97e0, 0x6a, 0x1)
Feb 21 14:37:06 localhost.localdomain isulad[65087]:         /usr/lib/golang/src/path/filepath/path.go:402 +0x50
Feb 21 14:37:06 localhost.localdomain isulad[65087]: main.GetDiskUsageStats(0x40004b7880, 0x6a, 0x4, 0x40004b7880, 0x6a, 0x2)
Feb 21 14:37:06 localhost.localdomain isulad[65087]:         /root/work/bugfix/kata/patch/iSulad-img/cmd/isulad_img/filesystem.go:26 +0x9c
Feb 21 14:37:06 localhost.localdomain isulad[65087]: main.getContainerStorageFsInfo(0xaaaad2eea600, 0x4000218f00, 0x400093b940, 0x40, 0x0, 0x0, 0x0)
Feb 21 14:37:06 localhost.localdomain isulad[65087]:         /root/work/bugfix/kata/patch/iSulad-img/cmd/isulad_img/container_filesystem_usage.go:36 +0x10c
Feb 21 14:37:06 localhost.localdomain isulad[65087]: main.containerFilesystemUsage(0x4000432370, 0x4000a98600, 0x40, 0xaaaad2e67bc0,