From: Akim Demaille <akim@lrde.epita.fr>
Date: Tue, 11 Aug 2015 11:48:57 +0000 (+0200)
Subject: lalr1, yacc: use the default location as initial error location
X-Git-Url: https://git.saurik.com/bison.git/commitdiff_plain/476c1cca5945eeef3493cfc6ef06ed6d0972d787?hp=476c1cca5945eeef3493cfc6ef06ed6d0972d787

lalr1, yacc: use the default location as initial error location

Currently lalr1.cc makes an out-of-bound access when trying to read @1
in rules with an empty rhs (i.e., when there is no @1) that raises an
error (YYERROR).

glr.c already gracefully handles this by using @$ as initial location
for the errors.  Let's do that in yacc.c and lalr1.cc.

* data/lalr1.cc, data/yacc.c: Use @$ to initialize the error location.
* tests/actions.at: Check that case.
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