2 files changed, 19 insertions, 4 deletions
diff --git a/src/cmd/compile/internal/typecheck/iexport.go b/src/cmd/compile/internal/typecheck/iexport.go
index b717c373f5..0a48078bd0 100644
--- a/src/cmd/compile/internal/typecheck/iexport.go
+++ b/src/cmd/compile/internal/typecheck/iexport.go
@@ -2116,8 +2116,15 @@ func (w *exportWriter) localIdent(s *types.Sym) {
 		return
 	}
 
-	// TODO(mdempsky): Fix autotmp hack.
-	if i := strings.LastIndex(name, "."); i >= 0 && !strings.HasPrefix(name, ".autotmp_") && !strings.HasPrefix(name, ".dict") { // TODO: just use autotmp names for dictionaries?
+	// The name of autotmp variables isn't important; they just need to
+	// be unique. To stabilize the export data, simply write out "$" as
+	// a marker and let the importer generate its own unique name.
+	if strings.HasPrefix(name, ".autotmp_") {
+		w.string("$autotmp")
+		return
+	}
+
+	if i := strings.LastIndex(name, "."); i >= 0 && !strings.HasPrefix(name, ".dict") { // TODO: just use autotmp names for dictionaries?
 		base.Fatalf("unexpected dot in identifier: %v", name)
 	}
 
diff --git a/src/cmd/compile/internal/typecheck/iimport.go b/src/cmd/compile/internal/typecheck/iimport.go
index f178869e28..7b7cd7f148 100644
--- a/src/cmd/compile/internal/typecheck/iimport.go
+++ b/src/cmd/compile/internal/typecheck/iimport.go
@@ -265,6 +265,7 @@ type importReader struct {
 	// Slice of all dcls for function, including any interior closures
 	allDcls        []*ir.Name
 	allClosureVars []*ir.Name
+	autotmpgen     int
 }
 
 func (p *iimporter) newReader(off uint64, pkg *types.Pkg) *importReader {
@@ -516,8 +517,15 @@ func (r *importReader) ident(selector bool) *types.Sym {
 		return nil
 	}
 	pkg := r.currPkg
-	if selector && types.IsExported(name) {
-		pkg = types.LocalPkg
+	if selector {
+		if types.IsExported(name) {
+			pkg = types.LocalPkg
+		}
+	} else {
+		if name == "$autotmp" {
+			name = autotmpname(r.autotmpgen)
+			r.autotmpgen++
+		}
 	}
 	return pkg.Lookup(name)
 }