allow failures, no longer compiles on Mono 4.0.5

Author: dsyme

.travis.yml

@@ -7,7 +7,6 @@ os:
 mono:
   - latest
   - 4.2.2
-  - 4.0.5
 
 sudo: false
 
@@ -16,7 +15,11 @@ install:
 script: 
   - ./build.sh NuGet
 
-#matrix:
-#  allow_failures:
-#    - os: osx
-#      mono: latest
+# See bug "https://bugzilla.xamarin.com/show_bug.cgi?id=41914"
+# peverify failing on Mono latest with "condition `res != EINVAL' not met"
+
+matrix:
+  allow_failures:
+    - mono: latest
+
+