diff --git a/src/cmd/compile/internal/logopt/log_opts.go b/src/cmd/compile/internal/logopt/log_opts.go
index 711b5b9d75c23f..5c7f580f0b2b70 100644
--- a/src/cmd/compile/internal/logopt/log_opts.go
+++ b/src/cmd/compile/internal/logopt/log_opts.go
@@ -405,6 +405,9 @@ func uriIfy(f string) DocumentURI {
 // Return filename, replacing a first occurrence of $GOROOT with the
 // actual value of the GOROOT (because LSP does not speak "$GOROOT").
 func uprootedPath(filename string) string {
+	if filename == "" {
+		return "__unnamed__"
+	}
 	if buildcfg.GOROOT == "" || !strings.HasPrefix(filename, "$GOROOT/") {
 		return filename
 	}
diff --git a/src/cmd/compile/internal/types/type.go b/src/cmd/compile/internal/types/type.go
index f4e6b92bd641c2..8329837a308a00 100644
--- a/src/cmd/compile/internal/types/type.go
+++ b/src/cmd/compile/internal/types/type.go
@@ -1680,7 +1680,7 @@ func FakeRecvType() *Type {
 }
 
 func FakeRecv() *Field {
-	return NewField(src.NoXPos, nil, FakeRecvType())
+	return NewField(base.AutogeneratedPos, nil, FakeRecvType())
 }
 
 var (