Unable to find data.tar.* #451
Description
Invalid deb package got into the repo. (Likely a bad upload) Aptly panics whenever it encounters it.
Oct 14 14:31:57 APTLY aptly[656]: 2016/10/14 14:31:57 PANIC: unable to find data.tar.* part in /repo/.aptly/pool/9f/e6/mypackage_2.1.0-45_amd64.deb
Oct 14 14:31:57 APTLY aptly[656]: /usr/local/Cellar/go/1.5.3/libexec/src/runtime/panic.go:423 (0x4296b9)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/package.go:427 (0x53aa94)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/package_collection.go:183 (0x53f76b)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/package.go:410 (0x53a8a5)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/contents.go:26 (0x51f03a)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/publish.go:568 (0x56b915)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/list.go:169 (0x52e79d)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/deb/publish.go:593 (0x549ff5)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/api/publish.go:307 (0x4c72bc)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/context.go:114 (0x67a07f)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/api/router.go:43 (0x4d1034)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/context.go:114 (0x67a07f)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/logger.go:30 (0x68257c)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/context.go:114 (0x67a07f)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/logger.go:49 (0x6826c5)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/context.go:114 (0x67a07f)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/recovery.go:96 (0x6831a8)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/context.go:114 (0x67a07f)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/routergroup.go:57 (0x683280)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/julienschmidt/httprouter/router.go:276 (0x7c23fd)
Oct 14 14:31:57 APTLY aptly[656]: /Users/smira/Documents/go/src/github.com/smira/aptly/_vendor/src/github.com/gin-gonic/gin/gin.go:126 (0x67de53)
Oct 14 14:31:57 APTLY aptly[656]: /usr/local/Cellar/go/1.5.3/libexec/src/net/http/server.go:1862 (0x4f682e)
Oct 14 14:31:57 APTLY aptly[656]: /usr/local/Cellar/go/1.5.3/libexec/src/net/http/server.go:1361 (0x4f3ede)
Oct 14 14:31:57 APTLY aptly[656]: /usr/local/Cellar/go/1.5.3/libexec/src/runtime/asm_amd64.s:1721 (0x45c181)
Desired behavior: Aptly detects the bad upload via the API and lets the user know. The deb doesn't get injected into the repos. The deb in this example was 0-bytes.