[jcollie@pc28043 rkt-logstash]$ acbuild version
acbuild version v0.1.0-4-g40f07a0
appc version 0.7.1+git
[jcollie@pc28043 rkt-logstash]$ sudo acbuild begin
[jcollie@pc28043 rkt-logstash]$ sudo acbuild dependency add dmacc.net/centos7 --image-id="sha512-baae275b452242b1ccdba64bff15a7a9" --label="version=0.1"
[jcollie@pc28043 rkt-logstash]$ sudo acbuild label add os linux
[jcollie@pc28043 rkt-logstash]$ sudo acbuild label add arch amd64
[jcollie@pc28043 rkt-logstash]$ sudo acbuild run --debug -- yum -y update
Running: [yum -y update]
Downloading dmacc.net/centos7: [===============================] 62.9 MB/62.9 MB
panic: runtime error: makeslice: len out of range==            ] 41.6 MB/62.9 MB

goroutine 1 [running]:
strings.Repeat(0x8ca320, 0x1, 0xfffffffffffffff5, 0x0, 0x0)
        /usr/local/go/src/strings/strings.go:464 +0x5f
github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress.DrawTextFormatBarForW.func2(0x4f38000, 0x3bfe5e9, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress/draw.go:114 +0xcf
github.com/appc/acbuild/registry.newIoprogress.func1(0x4f38000, 0x3bfe5e9, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/registry/fetch.go:441 +0x244
github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress.DrawTerminalf.func1(0x4f38000, 0x3bfe5e9, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress/draw.go:54 +0xf8
github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress.(*Reader).drawProgress(0xc820063d10)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress/reader.go:76 +0x1e1
github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress.(*Reader).Read(0xc820063d10, 0xc8204c6000, 0x8000, 0x8000, 0x8000, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/Godeps/_workspace/src/github.com/coreos/ioprogress/reader.go:50 +0x115
io.copyBuffer(0x7fd0406453f8, 0xc820028228, 0x7fd040647418, 0xc820063d10, 0xc8204c6000, 0x8000, 0x8000, 0x4f30000, 0x0, 0x0)
        /usr/local/go/src/io/io.go:381 +0x247
io.Copy(0x7fd0406453f8, 0xc820028228, 0x7fd040647418, 0xc820063d10, 0xc820028228, 0x0, 0x0)
        /usr/local/go/src/io/io.go:351 +0x64
github.com/appc/acbuild/registry.Registry.uncompress(0xc8200f6520, 0x15, 0xc8200f65a0, 0x1a, 0x860100, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/registry/fetch.go:256 +0x5e2
github.com/appc/acbuild/registry.Registry.fetchACIWithSize(0xc8200f6520, 0x15, 0xc8200f65a0, 0x1a, 0x430100, 0xc8200f6be0, 0x11, 0xc820085b80, 0x1, 0x4, ...)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/registry/fetch.go:134 +0x556
github.com/appc/acbuild/registry.Registry.Fetch(0xc8200f6520, 0x15, 0xc8200f65a0, 0x1a, 0x540100, 0xc8200f6be0, 0x11, 0xc820085b80, 0x1, 0x4, ...)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/registry/fetch.go:58 +0x1c9
github.com/appc/acbuild/registry.Registry.FetchAndRender(0xc8200f6520, 0x15, 0xc8200f65a0, 0x1a, 0x100, 0xc8200f6be0, 0x11, 0xc820085b80, 0x1, 0x4, ...)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/registry/fetch.go:71 +0xf3
github.com/appc/acbuild/lib.(*ACBuild).renderACI(0xc820085980, 0x100, 0x0, 0x0, 0x0, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/lib/run.go:200 +0x35c
github.com/appc/acbuild/lib.(*ACBuild).Run(0xc820085980, 0xc820062fa0, 0x3, 0x5, 0x0, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/lib/run.go:87 +0x4f1
main.runRun(0xd19fc0, 0xc820062fa0, 0x3, 0x5, 0x2)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/acbuild/run.go:48 +0x19f
main.runWrapper.func1(0xd19fc0, 0xc820062fa0, 0x3, 0x5)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/acbuild/acbuild.go:123 +0x73
github.com/appc/acbuild/Godeps/_workspace/src/github.com/spf13/cobra.(*Command).execute(0xd19fc0, 0xc820062f00, 0x5, 0x5, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/Godeps/_workspace/src/github.com/spf13/cobra/command.go:496 +0x6e3
github.com/appc/acbuild/Godeps/_workspace/src/github.com/spf13/cobra.(*Command).Execute(0xd17c00, 0x0, 0x0)
        /opt/acbuild/gopath/src/github.com/appc/acbuild/Godeps/_workspace/src/github.com/spf13/cobra/command.go:561 +0x180
main.main()
        /opt/acbuild/gopath/src/github.com/appc/acbuild/acbuild/acbuild.go:198 +0x94

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
        /usr/local/go/src/runtime/asm_amd64.s:1696 +0x1

goroutine 19 [select]:
net/http.(*persistConn).writeLoop(0xc8200d33f0)
        /usr/local/go/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
        /usr/local/go/src/net/http/transport.go:686 +0xc9d

goroutine 21 [IO wait]:
net.runtime_pollWait(0x7fd040647120, 0x72, 0xc8200121b0)
        /usr/local/go/src/runtime/netpoll.go:157 +0x60
net.(*pollDesc).Wait(0xc8200aced0, 0x72, 0x0, 0x0)
        /usr/local/go/src/net/fd_poll_runtime.go:73 +0x3a
net.(*pollDesc).WaitRead(0xc8200aced0, 0x0, 0x0)
        /usr/local/go/src/net/fd_poll_runtime.go:78 +0x36
net.(*netFD).Read(0xc8200ace70, 0xc820458000, 0x8000, 0x8000, 0x0, 0x7fd040641050, 0xc8200121b0)
        /usr/local/go/src/net/fd_unix.go:232 +0x23a
net.(*conn).Read(0xc82015e018, 0xc820458000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
        /usr/local/go/src/net/net.go:172 +0xe4
crypto/tls.(*block).readFromUntil(0xc820424ff0, 0x7fd0406472a0, 0xc82015e018, 0x5, 0x0, 0x0)
        /usr/local/go/src/crypto/tls/conn.go:455 +0xcc
crypto/tls.(*Conn).readRecord(0xc8201b5b80, 0x99c017, 0x0, 0x0)
        /usr/local/go/src/crypto/tls/conn.go:540 +0x2d1
crypto/tls.(*Conn).Read(0xc8201b5b80, 0xc820456000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /usr/local/go/src/crypto/tls/conn.go:901 +0x167
net/http.noteEOFReader.Read(0x7fd03edcf960, 0xc8201b5b80, 0xc8200d34f8, 0xc820456000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /usr/local/go/src/net/http/transport.go:1370 +0x67
net/http.(*noteEOFReader).Read(0xc820442b60, 0xc820456000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        <autogenerated>:126 +0xd0
bufio.(*Reader).fill(0xc8203f30e0)
        /usr/local/go/src/bufio/bufio.go:97 +0x1e9
bufio.(*Reader).Peek(0xc8203f30e0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0)
        /usr/local/go/src/bufio/bufio.go:132 +0xcc
net/http.(*persistConn).readLoop(0xc8200d34a0)
        /usr/local/go/src/net/http/transport.go:876 +0xf7
created by net/http.(*Transport).dialConn
        /usr/local/go/src/net/http/transport.go:685 +0xc78

goroutine 18 [IO wait]:
net.runtime_pollWait(0x7fd0406471e0, 0x72, 0xc8200121b0)
        /usr/local/go/src/runtime/netpoll.go:157 +0x60
net.(*pollDesc).Wait(0xc8200acd10, 0x72, 0x0, 0x0)
        /usr/local/go/src/net/fd_poll_runtime.go:73 +0x3a
net.(*pollDesc).WaitRead(0xc8200acd10, 0x0, 0x0)
        /usr/local/go/src/net/fd_poll_runtime.go:78 +0x36
net.(*netFD).Read(0xc8200accb0, 0xc820134000, 0x1000, 0x1000, 0x0, 0x7fd040641050, 0xc8200121b0)
        /usr/local/go/src/net/fd_unix.go:232 +0x23a
net.(*conn).Read(0xc8200281e0, 0xc820134000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /usr/local/go/src/net/net.go:172 +0xe4
crypto/tls.(*block).readFromUntil(0xc820128000, 0x7fd0406472a0, 0xc8200281e0, 0x5, 0x0, 0x0)
        /usr/local/go/src/crypto/tls/conn.go:455 +0xcc
crypto/tls.(*Conn).readRecord(0xc82007e840, 0x99c017, 0x0, 0x0)
        /usr/local/go/src/crypto/tls/conn.go:540 +0x2d1
crypto/tls.(*Conn).Read(0xc82007e840, 0xc820135000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /usr/local/go/src/crypto/tls/conn.go:901 +0x167
net/http.noteEOFReader.Read(0x7fd03edcf960, 0xc82007e840, 0xc8200d3448, 0xc820135000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /usr/local/go/src/net/http/transport.go:1370 +0x67
net/http.(*noteEOFReader).Read(0xc820423f40, 0xc820135000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        <autogenerated>:126 +0xd0
bufio.(*Reader).fill(0xc8203f29c0)
        /usr/local/go/src/bufio/bufio.go:97 +0x1e9
bufio.(*Reader).Peek(0xc8203f29c0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0)
        /usr/local/go/src/bufio/bufio.go:132 +0xcc
net/http.(*persistConn).readLoop(0xc8200d33f0)
        /usr/local/go/src/net/http/transport.go:876 +0xf7
created by net/http.(*Transport).dialConn
        /usr/local/go/src/net/http/transport.go:685 +0xc78

goroutine 22 [select]:
net/http.(*persistConn).writeLoop(0xc8200d34a0)
        /usr/local/go/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
        /usr/local/go/src/net/http/transport.go:686 +0xc9d

a5ad61df3b0d636115d3543c82befc0c84ffdb48 is the first bad commit
commit a5ad61df3b0d636115d3543c82befc0c84ffdb48
Author: Derek Gonyeo <derek.gonyeo@coreos.com>
Date:   Mon Oct 19 18:04:15 2015 -0700

    *: refactored library functions, added struct with common fields

    The library was refactored so that all the exposed functions were
    attached to a struct containing the information about the current
    context. This makes using the library much cleaner.

    The Registry struct had some of its fields renamed to be consistent with
    the new struct in the library.

    The functions for acquiring and releasing the lock were also moved from
    acbuild/acbuild.go to the new struct.

:040000 040000 0b4c18665811cff0026264baf86df63fafcc05ee 55039ab1fead9942c9614bbbe9f739b6f657cf0d M  acbuild
:040000 040000 a0e24013e636d4e8189af2c8d6d87acb0f914996 ce69a0ba1fd044cde549f7320f8aeef1f6ca40ee M  lib
:040000 040000 3a03acbd4d502a348d419705fb0f1257906a7060 d0ac54b87df26184a5bc3c884b8bc8c36fa50363 M  registry