Race condition when depending on rules created in post_build. about please HOT 1 OPEN

I have been looking into the code base to track down this issue, and found that it was actually a race condition.
It turns out that if there is another rule that can block the dependent rule until the post build completes, then everything works as expected. Otherwise, the same issue as mentioned occurs.

Here is an example build script that will succeed:

def post_func(ruleName, cmdOutput):
    fileRule = genrule(name="postFile", cmd = "sleep 10; touch postFile.txt", out="postFile.txt")
    add_dep(ruleName, fileRule, True)

genrule(name="postRule", cmd="", post_build=post_func)

genrule(name="waitRule", cmd="sleep 11; touch waitFile.txt", out="waitFile.txt")

genrule(name="postRuleConsumer", cmd="", deps=[":postRule", ":waitRule"])

Note the sleep 10 in the file rule and sleep 11 in the wait rule. As long as the "postFile" rule in this example completes before the "waitRule" everything works.

from please.