fix(interpreter): report overflow when dividing the minimum integer by -1

packages/interpreter/tests/program_eval_test.zigmodified+29-0

Changes to packages/interpreter/tests/program_eval_test.zig

		⋯58 linesShow the 58 lines above this hunk@@ -59,6 +59,35 @@ test "eval: nested arithmetic expression" {
59	59	try runProgram("fn main() { print((1 + 2) * 3 - 4) }");
60	60	}
61	61
	62	+test "eval: dividing the minimum integer by -1 reports the overflow" {
	63	+ try testing.expectError(error.RuntimeError, runProgram(
	64	+ \\fn main() {
	65	+ \\ let x = -9223372036854775807 - 1
	66	+ \\ print(x / -1)
	67	+ \\}
	68	+ ));
	69	+ try testing.expectError(error.RuntimeError, runProgram(
	70	+ \\fn main() {
	71	+ \\ let x = -9223372036854775807 - 1
	72	+ \\ print(x ~/ -1)
	73	+ \\}
	74	+ ));
	75	+ try testing.expectError(error.RuntimeError, runProgram(
	76	+ \\fn main() {
	77	+ \\ let x = -9223372036854775807 - 1
	78	+ \\ print(x /! -1)
	79	+ \\}
	80	+ ));
	81	+ try runProgram(
	82	+ \\fn main() {
	83	+ \\ let x = -9223372036854775807 - 1
	84	+ \\ assert(is_none(x /? -1))
	85	+ \\ assert(x / 1 == x)
	86	+ \\ assert(x ~/ 2 == -4611686018427387904)
	87	+ \\}
	88	+ );
	89	+}
	90	+
62	91	test "eval: multiple statements and a returning function" {
63	92	// Exercises several evaluateExpression entries across statements and a
64	93	// user-function call — all of which were unreachable while expression depth