Break loop whem `sum==0` to avoid zero division; ref #4345

3b92b642 · Yukihiro "Matz" Matsumoto · a26856f8 · 3b92b642
Commit 3b92b642 authored Mar 28, 2019 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-math/src/math.c mrbgems/mruby-math/src/math.c +1 -0

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--- a/mrbgems/mruby-math/src/math.c
+++ b/mrbgems/mruby-math/src/math.c
@@ -120,6 +120,7 @@ erf(double x)
    term *= xsqr/j;
    sum  += term/(2*j+1);
    ++j;
+    if (sum == 0) break;
  } while (fabs(term/sum) > DBL_EPSILON);
  return two_sqrtpi*sum;
 }