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rebinding values in an async function can double the memory usage #96084
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@rustbot label A-async-await AsyncAwait-Polish |
We discussed this in triage today. It seems like the issue is probably that @rustbot label +AsyncAwait-Triaged |
In #60187 I think I attempted making a MIR building change that caused |
Rebinding a value within an async function can cause the generated future to require twice the memory for the value. This seems to only happen if the value was borrowed earlier:
Playground link.
I don't know if this counts as a bug but the behavior is a bit surprising.
The effect is present in both debug and release modes with rustc 1.60.0.
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