fix uncaught crashes

Author: LorrensP-2158466

library/std/tests/floats/f32.rs

@@ -79,7 +79,7 @@ fn test_log() {
     let nan: f32 = f32::NAN;
     let inf: f32 = f32::INFINITY;
     let neg_inf: f32 = f32::NEG_INFINITY;
-    assert_approx_eq!(10.0f32.log(10.0), 1.0);
+    assert_approx_eq!(10.0f32.log(10.0), 1.0, APPROX_DELTA);
     assert_approx_eq!(2.3f32.log(3.5), 0.664858);
     assert_approx_eq!(1.0f32.exp().log(1.0f32.exp()), 1.0, APPROX_DELTA);
     assert!(1.0f32.log(1.0).is_nan());
@@ -218,7 +218,7 @@ fn test_ln_gamma() {
     assert_eq!(2.0f32.ln_gamma().1, 1);
     assert_approx_eq!(3.0f32.ln_gamma().0, 2.0f32.ln());
     assert_eq!(3.0f32.ln_gamma().1, 1);
-    assert_approx_eq!((-0.5f32).ln_gamma().0, (2.0 * consts::PI.sqrt()).ln());
+    assert_approx_eq!((-0.5f32).ln_gamma().0, (2.0 * consts::PI.sqrt()).ln(), APPROX_DELTA);
     assert_eq!((-0.5f32).ln_gamma().1, -1);
 }