read_int fails for int >=2^31

[MatthewMah]

The function read_int fails with file content "2147483648" (2^31) or larger, despite WDL Int being 64 bits.

Minimal WDL example:

version 1.0

workflow intake{
	input{
		File too_big
	}
	call A{ input:
		too_big = too_big
	}
}

task A{
	input{
		File too_big
	}
	Int x = read_int(too_big)
	
	command<<<
		echo "~{x}"
	>>>
}

Running in Cromwell 90:

Failed to evaluate input 'x' (reason 1 of 1): Failed to read_int("size_file") (reason 1 of 1): For input string: "2147483648"