test case for vector coercions, including holes

testing/btest/Baseline/language.vector-coerce-expr2/output

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+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+[5.5, 5.2, -3.9, 20.0]
+[11, 5, , 107, , , 1046]
+[-2, -4, , -7, , -18, -999]

testing/btest/language/vector-coerce-expr2.zeek

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+# @TEST-EXEC: zeek -b %INPUT >output 2>&1
+# @TEST-EXEC: btest-diff output
+
+event zeek_init()
+	{
+	local a = vector(3.5, 1.2, -9.9, 12);
+	local b = vector(2, 4, 6, 8);
+	local c: vector of double;
+
+	# The following requires correctly coercing 'b' to a vector-of-double
+	# prior to doing the addition.
+	c = a + b;
+
+	print c;
+	}
+
+event zeek_init()
+	{
+	local v1 = vector(2,4);
+	local v2 = vector(9,1);
+
+	# Give both v1 and v2 a hole at index 2.
+	v1[3] = 7;
+	v2[3] = 100;
+
+	# Give v1 a hole at 4 and v2 a hole at 5.
+	v1[5] = 18;
+	v1[6] = 999;
+
+	v2[4] = 42;
+	v2[6] = 47;
+
+	print v1 + v2;
+
+	# Make sure that holes get relected in unary operations,
+	# and also that vectors of count are properly coerced to
+	# vectors of int.
+	local v3: vector of int;
+	v3 = -v1;
+	print v3;
+	}