Add assertion to randrange that input is not 0

JeremyRubin · JeremyRubin · commit a35b6824f3a0 · 2019-10-28T16:42:39.000-07:00
diff --git a/src/random.h b/src/random.h
@@ -166,6 +166,7 @@ class FastRandomContext {
     /** Generate a random integer in the range [0..range). */
     uint64_t randrange(uint64_t range) noexcept
     {
+        assert(range);
         --range;
         int bits = CountBits(range);
         while (true) {

Original file line number	Diff line number	Diff line change
`@@ -166,6 +166,7 @@ class FastRandomContext {`
`166`	`166`	`/** Generate a random integer in the range [0..range). */`
`167`	`167`	`uint64_t randrange(uint64_t range) noexcept`
`168`	`168`	`{`
	`169`	`+ assert(range);`
`169`	`170`	`--range;`
`170`	`171`	`int bits = CountBits(range);`
`171`	`172`	`while (true) {`