chore: enable Go linting and vetting + rename CI job (#11)

* chore: enable Go linting and vetting + rename job

* chore: use `golangci/golangci-lint-action`

* fix: placate the linter

.github/workflows/go.yml

@@ -12,13 +12,13 @@ on:
 
 jobs:
 
-  build:
+  go:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
-    - name: Set up Go
-      uses: actions/setup-go@v4
+    - name: Setup
+      uses: actions/setup-go@v5
       with:
         go-version: '1.20'
 
@@ -27,3 +27,11 @@ jobs:
 
     - name: Test
       run: go test -v ./...
+
+    - name: Lint
+      uses: golangci/golangci-lint-action@v4
+      with:
+        version: v1.54
+
+    - name: Vet
+      run: go vet ./...

compile.go

@@ -275,7 +275,11 @@ func (s *spliceConcat) shrink() error {
 func (s *spliceConcat) bytes() ([]byte, error) {
 	code := new(bytes.Buffer)
 	for _, sp := range s.all {
-		sp.buf.WriteTo(code)
+		if _, err := sp.buf.WriteTo(code); err != nil {
+			// This should be impossible, but ignoring the error angers the
+			// linter.
+			return nil, fmt.Errorf("%T.bytes(): %T.buf.WriteTo(%T): %v", s, sp, code, err)
+		}
 
 		switch sp.op.(type) {
 		case JUMPDEST: