Seemingly arbitrary SIGSEGV crash

[tlwhitec]

Today, I record several pachelbel crashes during normal operation.

panic: runtime error: invalid memory address or nil pointer dereference
09:54:03 [signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x793afe]
09:54:03 
09:54:03 goroutine 604 [running]:
09:54:03 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).getJSON(0xc420010a00, 0x8a6cca, 0xb, 0x6ce1bf47c09f5a50, 0xc68e35b5a38ed86e, 0x248368b5bc4c07fa, 0x47555736063fd91f, 0x1e600d7b405800cf)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/composeapi.go:127 +0xce
09:54:03 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).GetDeploymentsJSON(0xc420010a00, 0x180e84d3825e5bc3, 0xa98a2920d4702f, 0x7b3037627b9bd55f, 0x187876f3c6415b57, 0xac39e5853843022c)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/deployment.go:168 +0x40
09:54:03 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).GetDeployments(0xc420010a00, 0x0, 0x0, 0x37c60337fa4d3450, 0xf99f89c579929647)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/deployment.go:172 +0x2f
09:54:03 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).GetDeploymentByName(0xc420010a00, 0xc420425780, 0x3b, 0xc420425780, 0x3b, 0x0, 0x0)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/deployment.go:206 +0x43
09:54:03 github.com/benjdewan/pachelbel/connection.(*Connection).GetAndAdd(0xc42014dc50, 0xc420425780, 0x3b, 0x0, 0x0)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/connection/connection.go:138 +0x5d
09:54:03 github.com/benjdewan/pachelbel/runner.dryRunLookup(0xc42014dc50, 0x904680, 0xc42014ef70, 0x0, 0x0)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/runner/runner.go:88 +0x43
09:54:03 github.com/benjdewan/pachelbel/runner.(*Controller).Run.func1(0xc4203a67c0, 0xc42020c0c0, 0xc42027e360, 0x904680, 0xc42014ef70, 0xc420708d60, 0x13, 0x8cb0f8)
09:54:03 	/go/src/github.com/benjdewan/pachelbel/runner/controller.go:53 +0x4e
09:54:03 created by github.com/benjdewan/pachelbel/runner.(*Controller).Run
09:54:03 	/go/src/github.com/benjdewan/pachelbel/runner/controller.go:52 +0x255

09:56:55 panic: runtime error: invalid memory address or nil pointer dereference
09:56:55 [signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x793afe]
09:56:55 
09:56:55 goroutine 1 [running]:
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).getJSON(0xc42014e8c0, 0xc4205e4510, 0x24, 0xc420625360, 0x18, 0xc4205e4510, 0x24, 0xc420230490)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/composeapi.go:127 +0xce
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).GetDeploymentJSON(0xc42014e8c0, 0xc420625360, 0x18, 0x8c000, 0x7eff80, 0xc420312000, 0x0, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/deployment.go:187 +0x7d
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).GetDeployment(0xc42014e8c0, 0xc420625360, 0x18, 0x1, 0x0, 0x0, 0x1a3)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/deployment.go:192 +0x43
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi.(*Client).GetDeploymentByName(0xc42014e8c0, 0xc420593230, 0x28, 0x0, 0xc42039fcf0, 0x1, 0x1)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/benjdewan/gocomposeapi/deployment.go:213 +0x155
09:56:55 github.com/benjdewan/pachelbel/connection.(*Connection).ExistingDeployment(0xc420151bf0, 0xc420593230, 0x28, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/connection/connection.go:197 +0xe1
09:56:55 github.com/benjdewan/pachelbel/config.existingDeployment(0xc420593230, 0x28, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/validate.go:33 +0xc5
09:56:55 github.com/benjdewan/pachelbel/config.validateV1(0x1, 0x0, 0x0, 0xc4203abf31, 0x7, 0xc42036b240, 0x18, 0x0, 0x0, 0x0, ...)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/v1_validate.go:26 +0x76c
09:56:55 github.com/benjdewan/pachelbel/config.(*Config).readConfigV1(0xc420151320, 0xc420429203, 0x7b, 0xdfd, 0xc420304240, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:238 +0x151
09:56:55 github.com/benjdewan/pachelbel/config.(*Config).readConfig(0xc420151320, 0xc420429203, 0x7b, 0xdfd, 0x0, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:151 +0x1ba
09:56:55 github.com/benjdewan/pachelbel/config.(*Config).readConfigs(0xc420151320, 0x901cc0, 0xc420636040, 0x0, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:132 +0xd9
09:56:55 github.com/benjdewan/pachelbel/config.(*Config).readFile(0xc420151320, 0xc4203a8660, 0x12, 0x0, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:125 +0x9a
09:56:55 github.com/benjdewan/pachelbel/config.(*Config).readDir.func1(0xc4203a8660, 0x12, 0x906e60, 0xc42062e410, 0x0, 0x0, 0xa, 0xc420231980)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:102 +0x9f
09:56:55 path/filepath.walk(0xc4203a8660, 0x12, 0x906e60, 0xc42062e410, 0xc4203222c0, 0x0, 0x0)
09:56:55 	/usr/local/go/src/path/filepath/path.go:357 +0x402
09:56:55 path/filepath.walk(0x7ffeaf182f29, 0x8, 0x906e60, 0xc42062e340, 0xc4203222c0, 0x0, 0x20)
09:56:55 	/usr/local/go/src/path/filepath/path.go:381 +0x2c2
09:56:55 path/filepath.Walk(0x7ffeaf182f29, 0x8, 0xc4203222c0, 0x0, 0x0)
09:56:55 	/usr/local/go/src/path/filepath/path.go:403 +0x106
09:56:55 github.com/benjdewan/pachelbel/config.(*Config).readDir(0xc420151320, 0x7ffeaf182f29, 0x8, 0xc42062e270, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:97 +0x80
09:56:55 github.com/benjdewan/pachelbel/config.ReadFiles(0xc420176840, 0x1, 0x4, 0x0, 0x0, 0xc420231c10)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/config/read.go:74 +0x1d6
09:56:55 github.com/benjdewan/pachelbel/cmd.readConfigs(0xc420151bf0, 0xc420176840, 0x1, 0x4, 0xc420151bf0, 0x0, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/cmd/provision.go:87 +0x184
09:56:55 github.com/benjdewan/pachelbel/cmd.runProvision(0xb2d880, 0xc420176840, 0x1, 0x4)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/cmd/provision.go:41 +0x174
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/spf13/cobra.(*Command).execute(0xb2d880, 0xc4201767c0, 0x4, 0x4, 0xb2d880, 0xc4201767c0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/spf13/cobra/command.go:766 +0x2c1
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xb2dd40, 0x4, 0x0, 0xb2dfa0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/spf13/cobra/command.go:852 +0x30a
09:56:55 github.com/benjdewan/pachelbel/vendor/github.com/spf13/cobra.(*Command).Execute(0xb2dd40, 0xc42014a058, 0x0)
09:56:55 	/go/src/github.com/benjdewan/pachelbel/vendor/github.com/spf13/cobra/command.go:800 +0x2b
09:56:55 github.com/benjdewan/pachelbel/cmd.Execute()
09:56:55 	/go/src/github.com/benjdewan/pachelbel/cmd/root.go:42 +0x2d
09:56:55 main.main()
09:56:55 	/go/src/github.com/benjdewan/pachelbel/main.go:6 +0x20

These two backtraces are from a single job, using the same parameters, third run was a success. Sadly I don't have any side channel data or what (if ever) compose returned.

[tlwhitec]

Oh, I see this is a duplicate of #7. Sorry for bothering.