Extremely mixed emotions when the Rust compiler tells me that this thing I've been working on all week fundamentally can't work, but also it was in an extremely subtle way that I never would have caught on my own
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Short version of the thing it caught: I want to try to grab a DB connection before spawning a thread that uses it (rather than spawn a thread and have it immediately block waiting for a DB conn). The connection uses a re-entrant mutex in tests. Can't have both.
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It makes complete sense now that the compiler stopped me, but damn this would have been hard to debug
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