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-rw-r--r--Eigen/src/Core/MathFunctions.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/Eigen/src/Core/MathFunctions.h b/Eigen/src/Core/MathFunctions.h
index fcf62011e..fbec39d83 100644
--- a/Eigen/src/Core/MathFunctions.h
+++ b/Eigen/src/Core/MathFunctions.h
@@ -551,7 +551,8 @@ namespace std_fallback {
Scalar x1p = RealScalar(1) + x;
Scalar log_1p = log(x1p);
const bool is_small = numext::equal_strict(x1p, Scalar(1));
- return is_small ? x : x * (log_1p / (x1p - RealScalar(1)));
+ const bool is_inf = numext::equal_strict(x1p, log_1p);
+ return (is_small || is_inf) ? x : x * (log_1p / (x1p - RealScalar(1)));
}
}