Pass through errors encountered during usage of io.Reader (#22)

gotenv.go

@@ -209,6 +209,10 @@ func strictParse(r io.Reader, override bool) (Env, error) {
 	firstLine := true
 
 	for scanner.Scan() {
+		if err := scanner.Err(); err != nil {
+			return env, err
+		}
+
 		line := strings.TrimSpace(scanner.Text())
 
 		if firstLine {

gotenv_test.go

@@ -2,6 +2,8 @@ package gotenv_test
 
 import (
 	"bufio"
+	"errors"
+	"io"
 	"os"
 	"strings"
 	"testing"
@@ -240,6 +242,19 @@ func TestStrictParse(t *testing.T) {
 	}
 }
 
+type failingReader struct {
+	io.Reader
+}
+
+func (fr failingReader) Read(p []byte) (n int, err error) {
+	return 0, errors.New("you shall not read")
+}
+
+func TestStrictParse_PassThroughErrors(t *testing.T) {
+	_, err := gotenv.StrictParse(&failingReader{})
+	assert.Error(t, err)
+}
+
 func TestRead(t *testing.T) {
 	for _, tt := range fixtures {
 		env, err := gotenv.Read(tt.filename)