Fix issue 16385: do not pass 0 to bsr, it has undefined return value

dlang · Aug 14, 2016 · 0d213a9 · 0d213a9
1 parent 41a1d2b
commit 0d213a9
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/std/range/primitives.d b/std/range/primitives.d
@@ -2109,6 +2109,11 @@ if (isNarrowString!(C[]))
             //ptr is used to avoid unnnecessary bounds checking.
             str = str.ptr[1 .. str.length];
         }
+        else if (c == 0xff)
+        {
+            // bsr undefined for 0
+            str = str.ptr[1 .. str.length];
+        }
         else
         {
              import core.bitop : bsr;