Emit `errcheck`-passing code

Makefile

@@ -1,3 +1,16 @@
+all: regen check
+
 regen:
 	go install ./...
 	make -C testdata regen
+
+.PHONY: check
+check: errcheck
+	errcheck testdata/out/compress-memcopy.go
+	errcheck testdata/out/compress-nomemcopy.go
+	errcheck testdata/out/debug.go
+	errcheck testdata/out/nocompress-memcopy.go
+	errcheck testdata/out/nocompress-nomemcopy.go
+
+errcheck:
+	go get github.com/kisielk/errcheck

release.go

@@ -129,11 +129,14 @@ func bindata_read(data, name string) ([]byte, error) {
 
 	var buf bytes.Buffer
 	_, err = io.Copy(&buf, gz)
-	gz.Close()
+	clErr := gz.Close()
 
 	if err != nil {
 		return nil, fmt.Errorf("Read %%q: %%v", name, err)
 	}
+	if clErr != nil {
+		return nil, err
+	}
 
 	return buf.Bytes(), nil
 }
@@ -164,11 +167,14 @@ func bindata_read(data []byte, name string) ([]byte, error) {
 
 	var buf bytes.Buffer
 	_, err = io.Copy(&buf, gz)
-	gz.Close()
+	clErr := gz.Close()
 
 	if err != nil {
 		return nil, fmt.Errorf("Read %%q: %%v", name, err)
 	}
+	if clErr != nil {
+		return nil, err
+	}
 
 	return buf.Bytes(), nil
 }

testdata/out/compress-memcopy.go

@@ -21,11 +21,14 @@ func bindata_read(data []byte, name string) ([]byte, error) {
 
 	var buf bytes.Buffer
 	_, err = io.Copy(&buf, gz)
-	gz.Close()
+	clErr := gz.Close()
 
 	if err != nil {
 		return nil, fmt.Errorf("Read %q: %v", name, err)
 	}
+	if clErr != nil {
+		return nil, err
+	}
 
 	return buf.Bytes(), nil
 }

testdata/out/compress-nomemcopy.go

@@ -31,11 +31,14 @@ func bindata_read(data, name string) ([]byte, error) {
 
 	var buf bytes.Buffer
 	_, err = io.Copy(&buf, gz)
-	gz.Close()
+	clErr := gz.Close()
 
 	if err != nil {
 		return nil, fmt.Errorf("Read %q: %v", name, err)
 	}
+	if clErr != nil {
+		return nil, err
+	}
 
 	return buf.Bytes(), nil
 }