I'm using mobx-state-tree, which generates very long error messages, when trying to instantiate a model with data that doesn't match the defined schema.
It appends a full dump of the the data to the message, among other things.
I've seen it generate a 300kB message from a 10kB JSON payload.
The issue seems to originate from a RegExp which is ran on each line of the stacktrace (which includes the message).