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-rw-r--r--src/go/internal/gcimporter/support.go5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/go/internal/gcimporter/support.go b/src/go/internal/gcimporter/support.go
index 2de7cacd2d..b8bb14dc49 100644
--- a/src/go/internal/gcimporter/support.go
+++ b/src/go/internal/gcimporter/support.go
@@ -17,7 +17,10 @@ func errorf(format string, args ...interface{}) {
panic(fmt.Sprintf(format, args...))
}
-const deltaNewFile = -64 // see cmd/compile/internal/gc/bexport.go
+// deltaNewFile is a magic line delta offset indicating a new file.
+// We use -64 because it is rare; see issue 20080 and CL 41619.
+// -64 is the smallest int that fits in a single byte as a varint.
+const deltaNewFile = -64
// Synthesize a token.Pos
type fakeFileSet struct {