dep ensure panic when fetching vendor directory

[zombiezen]

dep version: aaf8a8b

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x4dfda8]

goroutine 1 [running]:
panic(0x7ad2c0, 0xc420016060)
/usr/local/go/src/runtime/panic.go:500 +0x1a1
github.com/golang/dep/vendor/github.com/sdboyer/gps.(*SourceMgr).SourceExists(0xc42006acc0, 0xc4201437a0, 0x10, 0x0, 0x0, 0x0, 0x0, 0x0)
/workspace/src/github.com/golang/dep/vendor/github.com/sdboyer/gps/source_manager.go:438 +0x1a8
github.com/golang/dep/vendor/github.com/sdboyer/gps.(*bridge).SourceExists(0xc4201c9a80, 0xc4201437a0, 0x10, 0x0, 0x0, 0x0, 0x0, 0x1)
/workspace/src/github.com/golang/dep/vendor/github.com/sdboyer/gps/bridge.go:121 +0x93
github.com/golang/dep/vendor/github.com/sdboyer/gps.(*solver).createVersionQueue(0xc4200e82d0, 0xc4201437a0, 0x10, 0x0, 0x0, 0xc4201ce8b0, 0x1, 0x1, 0x0, 0x0, ...)
/workspace/src/github.com/golang/dep/vendor/github.com/sdboyer/gps/solver.go:643 +0x10a
github.com/golang/dep/vendor/github.com/sdboyer/gps.(*solver).solve(0xc4200e82d0, 0x0, 0x0, 0xc4201f6450)
/workspace/src/github.com/golang/dep/vendor/github.com/sdboyer/gps/solver.go:366 +0x471
github.com/golang/dep/vendor/github.com/sdboyer/gps.(*solver).Solve(0xc4200e82d0, 0x1c, 0xc42000c053, 0xd, 0xc4201299e0)
/workspace/src/github.com/golang/dep/vendor/github.com/sdboyer/gps/solver.go:317 +0x8e
main.(*ensureCommand).Run(0xc42012b6e0, 0xc420143650, 0xc42000c120, 0x0, 0x0, 0x0, 0x0)
/workspace/src/github.com/golang/dep/cmd/dep/ensure.go:144 +0x4a2
main.main()
/workspace/src/github.com/golang/dep/cmd/dep/main.go:97 +0x652

manifest.json:

{
    "dependencies": {
        "github.com/mattn/go-sqlite3": {
            "branch": "master"
        },
        "golang.org/x/net": {
            "branch": "master"
        },
        "zombiezen.com/go/capnproto2": {
            "version": "^2.12.0"
        },
        "zombiezen.com/go/log": {
            "revision": "3b3a2ab2e8b57f0097671f4329def9f293020d92"
        }
    }
}

lock.json:

{
    "memo": "7ea12fcf96452b0f673e7445c7ef14ae8dafcb2d5b01a046d71e73c78931f029",
    "projects": [
        {
            "name": "github.com/glycerine/rbtree",
            "branch": "master",
            "revision": "cd7940bb26b149ce2faf398e7c63fff01aa7b394",
            "packages": [
                "."
            ]
        },
        {
            "name": "github.com/mattn/go-sqlite3",
            "branch": "master",
            "revision": "866c3293d9a76aa491e56cc978d0d7fb0e63e121",
            "packages": [
                "."
            ]
        },
        {
            "name": "golang.org/x/net",
            "branch": "master",
            "revision": "a6577fac2d73be281a500b310739095313165611",
            "packages": [
                "context"
            ]
        },
        {
            "name": "zombiezen.com/go/capnproto2",
            "version": "v2.12.4",
            "revision": "a094e8b41eb423fd4114149c55bbbc345aefd1a3",
            "packages": [
                ".",
                "encoding/text",
                "internal/fulfiller",
                "internal/nodemap",
                "internal/packed",
                "internal/queue",
                "rpc",
                "rpc/internal/refcount",
                "schemas",
                "server",
                "std/capnp/rpc",
                "std/capnp/schema"
            ]
        },
        {
            "name": "zombiezen.com/go/log",
            "revision": "3b3a2ab2e8b57f0097671f4329def9f293020d92",
            "packages": [
                "."
            ]
        }
    ]
}

I don't have much more insight than this.

[sdboyer]

This is gonna be the same underlying issue as #250 - we just haven't merged in an updated gps yet. It's taking a little time in part because we're also trying to just fully move it over - #300

[sdboyer]

(closing b/c it's a dupe)