Starting download of /gnu/store/9aivdpmc694k1iairn3mmr3vnkzzslpc-rust-tracing-futures-0.2.4.tar.gz
From https://crates.io/api/v1/crates/tracing-futures/0.2.4/download...
following redirection to `https://static.crates.io/crates/tracing-futures/tracing-futures-0.2.4.crate'...
GC Warning: Repeated allocation of very large block (appr. size 69632):
	May lead to memory leak and poor performance

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