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-rw-r--r--src/pkg/ebnf/parser.go2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/pkg/ebnf/parser.go b/src/pkg/ebnf/parser.go
index ef72d91fd..c38530177 100644
--- a/src/pkg/ebnf/parser.go
+++ b/src/pkg/ebnf/parser.go
@@ -177,7 +177,7 @@ func (p *parser) parse(fset *token.FileSet, filename string, src []byte) Grammar
// initialize parser
p.fset = fset
p.ErrorVector.Reset()
- p.scanner.Init(fset, filename, src, p, 0)
+ p.scanner.Init(fset.AddFile(filename, fset.Base(), len(src)), src, p, 0)
p.next() // initializes pos, tok, lit
grammar := make(Grammar)