I haven't touched heroku in over a year. Went to update an existing app.

heroku_lol.log

heroku
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0x3030ba6a7059 pc=0x1a0970]

goroutine 1 [running]:
runtime.throw(0x4515a0, 0x2a)
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/panic.go:527 +0x90 fp=0xc8200fbbf8 sp=0xc8200fbbe0
runtime.sigpanic()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/sigpanic_unix.go:12 +0x5a fp=0xc8200fbc48 sp=0xc8200fbbf8
sync.(*Pool).Get(0x5b0820, 0x0, 0x0)
	/usr/local/Cellar/go/1.5.1/libexec/src/sync/pool.go:101 +0x40 fp=0xc8200fbc98 sp=0xc8200fbc48
fmt.newPrinter(0x2cfe9)
	/usr/local/Cellar/go/1.5.1/libexec/src/fmt/print.go:133 +0x27 fp=0xc8200fbcd8 sp=0xc8200fbc98
fmt.Sprintf(0x433060, 0x18, 0xc8200fbdc8, 0x4, 0x4, 0x0, 0x0)
	/usr/local/Cellar/go/1.5.1/libexec/src/fmt/print.go:202 +0x2b fp=0xc8200fbd28 sp=0xc8200fbcd8
main.version(0x0, 0x0)
	/Users/jdickey/src/github.com/heroku/heroku-cli/version.go:33 +0x28c fp=0xc8200fbe10 sp=0xc8200fbd28
main.(*Cli).Run(0x5b0d20, 0xc82000a210, 0x3, 0x3, 0x0, 0x0)
	/Users/jdickey/src/github.com/heroku/heroku-cli/cli.go:59 +0x445 fp=0xc8200fbee0 sp=0xc8200fbe10
main.main()
	/Users/jdickey/src/github.com/heroku/heroku-cli/main.go:77 +0xb4 fp=0xc8200fbf40 sp=0xc8200fbee0
runtime.main()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/proc.go:111 +0x2b0 fp=0xc8200fbf90 sp=0xc8200fbf40
runtime.goexit()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/asm_amd64.s:1696 +0x1 fp=0xc8200fbf98 sp=0xc8200fbf90

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/asm_amd64.s:1696 +0x1

goroutine 5 [syscall]:
os/signal.loop()
	/usr/local/Cellar/go/1.5.1/libexec/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.1
	/usr/local/Cellar/go/1.5.1/libexec/src/os/signal/signal_unix.go:28 +0x37

goroutine 6 [chan receive]:
github.com/stvp/rollbar.init.1.func1()
	/Users/jdickey/src/github.com/stvp/rollbar/rollbar.go:74 +0x4c
created by github.com/stvp/rollbar.init.1
	/Users/jdickey/src/github.com/stvp/rollbar/rollbar.go:78 +0x5c
 !    error getting commands pid 35754 exit 2
mmcmahand@retina-2:~$ heroku --version
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0x30317e5bbb3c pc=0x1a0970]

goroutine 1 [running]:
runtime.throw(0x4515a0, 0x2a)
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/panic.go:527 +0x90 fp=0xc820115bf8 sp=0xc820115be0
runtime.sigpanic()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/sigpanic_unix.go:12 +0x5a fp=0xc820115c48 sp=0xc820115bf8
sync.(*Pool).Get(0x5b0820, 0x0, 0x0)
	/usr/local/Cellar/go/1.5.1/libexec/src/sync/pool.go:101 +0x40 fp=0xc820115c98 sp=0xc820115c48
fmt.newPrinter(0x2cfe9)
	/usr/local/Cellar/go/1.5.1/libexec/src/fmt/print.go:133 +0x27 fp=0xc820115cd8 sp=0xc820115c98
fmt.Sprintf(0x433060, 0x18, 0xc820115dc8, 0x4, 0x4, 0x0, 0x0)
	/usr/local/Cellar/go/1.5.1/libexec/src/fmt/print.go:202 +0x2b fp=0xc820115d28 sp=0xc820115cd8
main.version(0x0, 0x0)
	/Users/jdickey/src/github.com/heroku/heroku-cli/version.go:33 +0x28c fp=0xc820115e10 sp=0xc820115d28
main.(*Cli).Run(0x5b0d20, 0xc82006a120, 0x3, 0x3, 0x0, 0x0)
	/Users/jdickey/src/github.com/heroku/heroku-cli/cli.go:59 +0x445 fp=0xc820115ee0 sp=0xc820115e10
main.main()
	/Users/jdickey/src/github.com/heroku/heroku-cli/main.go:77 +0xb4 fp=0xc820115f40 sp=0xc820115ee0
runtime.main()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/proc.go:111 +0x2b0 fp=0xc820115f90 sp=0xc820115f40
runtime.goexit()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/asm_amd64.s:1696 +0x1 fp=0xc820115f98 sp=0xc820115f90

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
	/usr/local/Cellar/go/1.5.1/libexec/src/runtime/asm_amd64.s:1696 +0x1

goroutine 19 [syscall]:
os/signal.loop()
	/usr/local/Cellar/go/1.5.1/libexec/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.1
	/usr/local/Cellar/go/1.5.1/libexec/src/os/signal/signal_unix.go:28 +0x37

goroutine 20 [chan receive]:
github.com/stvp/rollbar.init.1.func1()
	/Users/jdickey/src/github.com/stvp/rollbar/rollbar.go:74 +0x4c
created by github.com/stvp/rollbar.init.1
	/Users/jdickey/src/github.com/stvp/rollbar/rollbar.go:78 +0x5c
 !    error getting commands pid 36159 exit 2