Error: rpc error: code = Unavailable desc = transport is closing

panic: runtime error: invalid memory address or nil pointer dereference
2020-02-11T21:17:55.783Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: [signal SIGSEGV: segmentation violation code=0x1 addr=0x168 pc=0x17f8aba]
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: goroutine 62 [running]:
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/IBM-Cloud/terraform-provider-ibm/ibm.flattenDisks(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/src/github.com/IBM-Cloud/terraform-provider-ibm/ibm/structures.go:861 +0x10a
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/IBM-Cloud/terraform-provider-ibm/ibm.resourceIBMComputeVmInstanceRead(0xc000430cb0, 0x1d3ad40, 0xc000100900, 0xc000430cb0, 0x0)
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/src/github.com/IBM-Cloud/terraform-provider-ibm/ibm/resource_ibm_compute_vm_instance.go:1130 +0x2290
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/hashicorp/terraform-plugin-sdk/helper/schema.(*Resource).RefreshWithoutUpgrade(0xc000523280, 0xc0004744b0, 0x1d3ad40, 0xc000100900, 0xc00078ec28, 0x0, 0x0)
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.6.0/helper/schema/resource.go:455 +0x119
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/hashicorp/terraform-plugin-sdk/internal/helper/plugin.(*GRPCProviderServer).ReadResource(0xc00000f0d8, 0x21c90a0, 0xc0003f80f0, 0xc0004742d0, 0xc00000f0d8, 0xc0003f80f0, 0xc000696a80)
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.6.0/internal/helper/plugin/grpc_provider.go:525 +0x3d8
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/hashicorp/terraform-plugin-sdk/internal/tfplugin5._Provider_ReadResource_Handler(0x1cc69a0, 0xc00000f0d8, 0x21c90a0, 0xc0003f80f0, 0xc00019d800, 0x0, 0x21c90a0, 0xc0003f80f0, 0xc00043c900, 0x418)
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.6.0/internal/tfplugin5/tfplugin5.pb.go:3153 +0x217
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: google.golang.org/grpc.(*Server).processUnaryRPC(0xc000016840, 0x21daa20, 0xc0001b7980, 0xc0000e6c00, 0xc00049fe90, 0x2f5aa90, 0x0, 0x0, 0x0)
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:995 +0x460
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: google.golang.org/grpc.(*Server).handleStream(0xc000016840, 0x21daa20, 0xc0001b7980, 0xc0000e6c00, 0x0)
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:1275 +0xd97
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: google.golang.org/grpc.(*Server).serveStreams.func1.1(0xc000590030, 0xc000016840, 0x21daa20, 0xc0001b7980, 0xc0000e6c00)
2020-02-11T21:17:55.787Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:710 +0xbb
2020-02-11T21:17:55.787Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: created by google.golang.org/grpc.(*Server).serveStreams.func1
2020-02-11T21:17:55.787Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:708 +0xa1
2020/02/11 21:17:55 [ERROR] <root>: eval: *terraform.EvalRefresh, err: rpc error: code = Unavailable desc = transport is closing
2020/02/11 21:17:55 [ERROR] <root>: eval: *terraform.EvalSequence, err: rpc error: code = Unavailable desc = transport is closing
2020/02/11 21:17:55 [TRACE] [walkImport] Exiting eval tree: import ibm_compute_vm_instance.svb-demo-11 result
2020/02/11 21:17:55 [TRACE] vertex "import ibm_compute_vm_instance.svb-demo-11 result": visit complete
2020/02/11 21:17:55 [TRACE] vertex "ibm_compute_vm_instance.svb-demo-11 (import id \"64326093\")": dynamic subgraph encountered errors
2020/02/11 21:17:55 [TRACE] vertex "ibm_compute_vm_instance.svb-demo-11 (import id \"64326093\")": visit complete
2020/02/11 21:17:55 [TRACE] dag/walk: upstream of "provider.ibm (close)" errored, so skipping
2020/02/11 21:17:55 [TRACE] statemgr.Filesystem: removing lock metadata file .terraform.tfstate.lock.info
2020/02/11 21:17:55 [TRACE] statemgr.Filesystem: unlocking terraform.tfstate using fcntl flock
2020-02-11T21:17:55.792Z [DEBUG] plugin: plugin process exited: path=/home/vagrant/.terraform.d/plugins/terraform-provider-ibm_v1.2.0 pid=9102 error="exit status 2"
2020-02-11T21:17:55.792Z [DEBUG] plugin: plugin exited
panic: runtime error: invalid memory address or nil pointer dereference
2020-02-11T21:17:55.783Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: [signal SIGSEGV: segmentation violation code=0x1 addr=0x168 pc=0x17f8aba]
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: goroutine 62 [running]:
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/IBM-Cloud/terraform-provider-ibm/ibm.flattenDisks(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/src/github.com/IBM-Cloud/terraform-provider-ibm/ibm/structures.go:861 +0x10a
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/IBM-Cloud/terraform-provider-ibm/ibm.resourceIBMComputeVmInstanceRead(0xc000430cb0, 0x1d3ad40, 0xc000100900, 0xc000430cb0, 0x0)
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/src/github.com/IBM-Cloud/terraform-provider-ibm/ibm/resource_ibm_compute_vm_instance.go:1130 +0x2290
2020-02-11T21:17:55.784Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/hashicorp/terraform-plugin-sdk/helper/schema.(*Resource).RefreshWithoutUpgrade(0xc000523280, 0xc0004744b0, 0x1d3ad40, 0xc000100900, 0xc00078ec28, 0x0, 0x0)
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.6.0/helper/schema/resource.go:455 +0x119
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/hashicorp/terraform-plugin-sdk/internal/helper/plugin.(*GRPCProviderServer).ReadResource(0xc00000f0d8, 0x21c90a0, 0xc0003f80f0, 0xc0004742d0, 0xc00000f0d8, 0xc0003f80f0, 0xc000696a80)
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.6.0/internal/helper/plugin/grpc_provider.go:525 +0x3d8
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: github.com/hashicorp/terraform-plugin-sdk/internal/tfplugin5._Provider_ReadResource_Handler(0x1cc69a0, 0xc00000f0d8, 0x21c90a0, 0xc0003f80f0, 0xc00019d800, 0x0, 0x21c90a0, 0xc0003f80f0, 0xc00043c900, 0x418)
2020-02-11T21:17:55.785Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.6.0/internal/tfplugin5/tfplugin5.pb.go:3153 +0x217
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: google.golang.org/grpc.(*Server).processUnaryRPC(0xc000016840, 0x21daa20, 0xc0001b7980, 0xc0000e6c00, 0xc00049fe90, 0x2f5aa90, 0x0, 0x0, 0x0)
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:995 +0x460
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: google.golang.org/grpc.(*Server).handleStream(0xc000016840, 0x21daa20, 0xc0001b7980, 0xc0000e6c00, 0x0)
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:1275 +0xd97
2020-02-11T21:17:55.786Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: google.golang.org/grpc.(*Server).serveStreams.func1.1(0xc000590030, 0xc000016840, 0x21daa20, 0xc0001b7980, 0xc0000e6c00)
2020-02-11T21:17:55.787Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:710 +0xbb
2020-02-11T21:17:55.787Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0: created by google.golang.org/grpc.(*Server).serveStreams.func1
2020-02-11T21:17:55.787Z [DEBUG] plugin.terraform-provider-ibm_v1.2.0:  /Users/umarali/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:708 +0xa1
2020/02/11 21:17:55 [ERROR] <root>: eval: *terraform.EvalRefresh, err: rpc error: code = Unavailable desc = transport is closing
2020/02/11 21:17:55 [ERROR] <root>: eval: *terraform.EvalSequence, err: rpc error: code = Unavailable desc = transport is closing
2020/02/11 21:17:55 [TRACE] [walkImport] Exiting eval tree: import ibm_compute_vm_instance.demo-11 result
2020/02/11 21:17:55 [TRACE] vertex "import ibm_compute_vm_instance.demo-11 result": visit complete
2020/02/11 21:17:55 [TRACE] vertex "ibm_compute_vm_instance.demo-11 (import id \"XXXXXXX\")": dynamic subgraph encountered errors
2020/02/11 21:17:55 [TRACE] vertex "ibm_compute_vm_instance.demo-11 (import id \"XXXXXXXX\")": visit complete
2020/02/11 21:17:55 [TRACE] dag/walk: upstream of "provider.ibm (close)" errored, so skipping
2020/02/11 21:17:55 [TRACE] statemgr.Filesystem: removing lock metadata file .terraform.tfstate.lock.info
2020/02/11 21:17:55 [TRACE] statemgr.Filesystem: unlocking terraform.tfstate using fcntl flock
2020-02-11T21:17:55.792Z [DEBUG] plugin: plugin process exited: path=/home/vagrant/.terraform.d/plugins/terraform-provider-ibm_v1.2.0 pid=9102 error="exit status 2"
2020-02-11T21:17:55.792Z [DEBUG] plugin: plugin exited

!!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!!

Terraform crashed! This is always indicative of a bug within Terraform.
A crash log has been placed at "crash.log" relative to your current
working directory. It would be immensely helpful if you could please
report the crash with Terraform[1] so that we can fix this.

When reporting bugs, please include your terraform version. That
information is available on the first line of crash.log. You can also
get it by running 'terraform --version' on the command line.

SECURITY WARNING: the "crash.log" file that was created may contain
sensitive information that must be redacted before it is safe to share
on the issue tracker.

[1]: https://github.com/hashicorp/terraform/issues