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runtime: types are not garbage collected #28783
go version devel +644ddaa842 Wed Nov 7 16:12:02 2018 +0000 linux/amd64
Newly created types are not garbage collected, so code which creates types on the fly in response to runtime data can leak memory.
This code prints a large number when it should print zero: https://play.golang.org/p/R6N6IJSzYTD
Yep. This is a hard one to fix.
Somewhat related to #20461