Fix bugs

1 files changed, 8 insertions, 1 deletions

diff --git a/progress.go b/progress.go
index da7cef0..ddc810a 100644
--- a/progress.go
+++ b/progress.go
@@ -5,7 +5,7 @@
 //	import (
 //		time"
 //
-//		"gitlab.com/rhogenson/progress-bar/progress"
+//		"gitlab.com/rhogenson/progress-bar"
 //	)
 //
 //	func main() {
@@ -43,6 +43,9 @@ type Bar struct {
 
 // Set sets the current value to val. val must be between 0 and 1, inclusive.
 func (b *Bar) Set(val float64) {
+	if !(0 <= val && val <= 1) {
+		panic(fmt.Sprintf("progress.Bar.Set: value must be between 0 and 1 (got %f)", val))
+	}
 	if b.measurements.Len() == measurements {
 		b.measurements.PopFront()
 	}
@@ -51,6 +54,10 @@ func (b *Bar) Set(val float64) {
 
 // Print shows the progress bar on standard error.
 func (b *Bar) Print() {
+	if b.measurements.Len() == 0 {
+		return
+	}
+
 	first := b.measurements.Get(0)
 	last := b.measurements.Get(b.measurements.Len() - 1)
 	deltaT := last.t.Sub(first.t)