Use exitcode from pyenv-version-name in pyenv-version, do not halt

test/version-name.bats

@@ -72,6 +72,19 @@ pyenv: version \`1.2' is not installed
 OUT
 }
 
+pyenv-version-name-without-stderr() {
+  pyenv-version-name 2>/dev/null
+}
+
+@test "one missing version (without stderr)" {
+  create_version "3.4.2"
+  PYENV_VERSION="1.2:3.4.2" run pyenv-version-name-without-stderr
+  assert_failure
+  assert_output <<OUT
+3.4.2
+OUT
+}
+
 @test "version with prefix in name" {
   create_version "2.7.6"
   cat > ".python-version" <<<"python-2.7.6"