nil pointer deference when updating process group during deploy

[eliferrous]

flyctl/internal/command/deploy/plan.go

Line 340 in 41691d4

for _, machPair := range machineTuples {

panic: runtime error: invalid memory address or nil pointer dereference
2024-11-22T14:04:49.7325598Z [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x20f983e]
2024-11-22T14:04:49.7326218Z
2024-11-22T14:04:49.7326919Z goroutine 73418 [running]:
2024-11-22T14:04:49.7327955Z github.com/superfly/flyctl/internal/command/deploy.(*machineDeployment).updateProcessGroup.func1()
2024-11-22T14:04:49.7329492Z /home/runner/work/flyctl/flyctl/internal/command/deploy/plan.go:340 +0x1e
2024-11-22T14:04:49.7330440Z golang.org/x/sync/errgroup.(*Group).Go.func1()
2024-11-22T14:04:49.7331597Z /home/runner/go/pkg/mod/golang.org/x/sync@v0.9.0/errgroup/errgroup.go:78 +0x56
2024-11-22T14:04:49.7332605Z created by golang.org/x/sync/errgroup.(*Group).Go in goroutine 68623
2024-11-22T14:04:49.7333837Z /home/runner/go/pkg/mod/golang.org/x/sync@v0.9.0/errgroup/errgroup.go:75 +0x96
2024-11-22T14:04:49.7446409Z ##[error]Process completed with exit code 2.