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7aaea283ca
Was getting segfaults with multiple services using `x-develop` and `watch` at the same time. Turns out the Moby path matcher lazily initializes the regex pattern internally the first time it's used, so it's not goroutine-safe. Change here is to not use a global instance for the ephemeral path matcher, but a per-watcher instance. Additionally, the data race detector caught a couple other issues that were easy enough to fix: * Use the lock that's used elsewhere for convergence before manipulating * Eliminate concurrent map access when triggering rebuilds Signed-off-by: Milas Bowman <milas.bowman@docker.com>