这些天发生了一些奇怪的事情。
有时在推送到 heroku 时，我会收到以下错误：
<internal:prelude>:8:in `lock': deadlock detected (fatal)
from <internal:prelude>:8:in `synchronize'
from /app/tmp/buildpacks/ruby/vendor/lpxc.rb:57:in `puts'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:10:in `bench_msg'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:23:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:43:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:39:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/ruby.rb:261:in `install_ruby'
from /app/tmp/buildpacks/ruby/lib/language_pack/ruby.rb:87:in `block in compile'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:19:in `block (2 levels) in instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:41:in `yield_with_block_depth'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:18:in `block in instrument'
from /usr/local/lib/ruby/1.9.1/benchmark.rb:310:in `realtime'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:17:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:43:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:39:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/ruby.rb:84:in `compile'
from /app/tmp/buildpacks/ruby/lib/language_pack/rails2.rb:48:in `block in compile'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:19:in `block (2 levels) in instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:41:in `yield_with_block_depth'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:18:in `block in instrument'
from /usr/local/lib/ruby/1.9.1/benchmark.rb:310:in `realtime'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:17:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:43:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:39:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/rails2.rb:46:in `compile'
from /app/tmp/buildpacks/ruby/lib/language_pack/rails3.rb:37:in `block in compile'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:19:in `block (2 levels) in instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:41:in `yield_with_block_depth'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:18:in `block in instrument'
from /usr/local/lib/ruby/1.9.1/benchmark.rb:310:in `realtime'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:17:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:43:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:39:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/rails3.rb:36:in `compile'
from /app/tmp/buildpacks/ruby/bin/compile:12:in `block (2 levels) in <main>'
from /app/tmp/buildpacks/ruby/lib/language_pack/base.rb:113:in `log'
from /app/tmp/buildpacks/ruby/bin/compile:11:in `block in <main>'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:36:in `call'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:36:in `block in trace'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:19:in `block (2 levels) in instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:41:in `yield_with_block_depth'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:18:in `block in instrument'
from /usr/local/lib/ruby/1.9.1/benchmark.rb:310:in `realtime'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:17:in `instrument'
from /app/tmp/buildpacks/ruby/lib/language_pack/instrument.rb:36:in `trace'
from /app/tmp/buildpacks/ruby/bin/compile:9:in `<main>'
! Push rejected, failed to compile Ruby/Rails app
但是，如果我在这之后再推几次，一切正常。怎么了？
有时我什至明白
致命：looseobjecta35c1489005cca1ffeb3c2d3e4d63988408b6a24（storedin.git/objects/a3/5c1489005cca1ffeb3c2d3e4d63988408b6a24）已损坏
为什么会这样？