diff --git a/src/lib/flag.go b/src/lib/flag.go
index acf3424db39..351159c179e 100644
--- a/src/lib/flag.go
+++ b/src/lib/flag.go
@@ -144,9 +144,7 @@ func (b *BoolValue) Str() string {
 	if b.val {
 		return "true"
 	}
-	else {
-		return "false"
-	}
+	return "false"
 }
 
 func NewBoolValue(b bool, p *bool) *BoolValue {
diff --git a/src/lib/math/hypot.go b/src/lib/math/hypot.go
index 3b3c1e510ac..d1afac9e3fe 100644
--- a/src/lib/math/hypot.go
+++ b/src/lib/math/hypot.go
@@ -49,4 +49,5 @@ hypot(p, q float64) float64
 		q = q*r;
 		r = q/p;
 	}
+	panic("unreachable")
 }
diff --git a/src/lib/math/pow.go b/src/lib/math/pow.go
index 8adb72132a9..590b0114b8c 100644
--- a/src/lib/math/pow.go
+++ b/src/lib/math/pow.go
@@ -62,4 +62,5 @@ pow(arg1,arg2 float64) float64
 		}
 		arg1 *= arg1;
 	}
+	panic("unreachable")
 }
diff --git a/src/lib/os/os_error.go b/src/lib/os/os_error.go
index 16799ed5e36..21e1bc6272d 100644
--- a/src/lib/os/os_error.go
+++ b/src/lib/os/os_error.go
@@ -70,7 +70,6 @@ const NoError = "No Error"
 func (e *Error) String() string {
 	if e == nil {
 		return NoError
-	} else {
-		return e.s
 	}
+	return e.s
 }
diff --git a/test/chan/powser1.go b/test/chan/powser1.go
index e737c55bfe9..a978a32ca53 100644
--- a/test/chan/powser1.go
+++ b/test/chan/powser1.go
@@ -382,7 +382,7 @@ func Monmul(U PS, n int) PS{
 // Multiply by x
 
 func Xmul(U PS) PS{
-	Monmul(U,1);
+	return Monmul(U,1);
 }
 
 func Rep(c *rat) PS{
diff --git a/test/fixedbugs/bug028.go b/test/fixedbugs/bug028.go
index 7ec016c4547..0488ad2cba8 100644
--- a/test/fixedbugs/bug028.go
+++ b/test/fixedbugs/bug028.go
@@ -16,6 +16,7 @@ func Alloc(i int) int {
 	case 10:
 		return 10;
 	}
+	return 0
 }
 
 func main() {
diff --git a/test/bugs/bug086.go b/test/fixedbugs/bug086.go
similarity index 100%
rename from test/bugs/bug086.go
rename to test/fixedbugs/bug086.go
diff --git a/test/golden.out b/test/golden.out
index db1a9f37cec..0ff2e357b1a 100644
--- a/test/golden.out
+++ b/test/golden.out
@@ -226,5 +226,8 @@ fixedbugs/bug073.go:9: illegal types for operand: RSH
 =========== fixedbugs/bug081.go
 fixedbugs/bug081.go:5: syntax error
 
+=========== fixedbugs/bug086.go
+fixedbugs/bug086.go:5: function ends without a return statement
+
 =========== fixedbugs/bug091.go
 fixedbugs/bug091.go:14: label exit not defined