Summary
Bad warning number in argument to "--emake-hide-warning" or in environment variable "EMAKE_HIDE_WARNING".
Description
The argument to "--emake-hide-warning" should be a comma-separated list of zero or more warning numbers; the same is true for any value assigned to "EMAKE_HIDE_WARNING". If an element of such a list is not the decimal representation of a positive integer, or is implausibly large, then emake will issue this error. (Currently we do not check to see if the given numbers are actually assigned, and perhaps that is best for forward compatibility.)
Fixes
The error message text will mention the first offending list element. Replace it with an actual warning number, and check the remainder of the list for similar errors.
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