Looking at the treelang/parse.y I have found the following (lines 202-208) if (STORAGE_CLASS (prod) == EXTERNAL_REFERENCE_STORAGE) { error("%HExternal reference variable %q.*s has an initial value.", &tok->tp.tok.location, tok->tp.tok.length, tok->tp.tok.chars); YYERROR; VAR_INIT (prod) = NULL; }
The line VAR_INIT (prod) = NULLs is dead since YYERROR is defined as "goto yyerrorlab" Rafael Ávila de Espíndola
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