[PATCH 6/6] glr.c: initialize vector of bools

[Akim Demaille]

The CI, with CC='gcc-7 -fsanitize=undefined,address
-fno-omit-frame-pointer', reports:

    calc.cc:1652:50: runtime error: load of value 190, which is not a valid 
value for type 'bool'
    ../../tests/calc.at:867: cat stderr
    --- expout  2019-09-05 20:30:37.887257545 +0000
    +++ 
/home/travis/build/bison-3.4.1.72-79a1-dirty/_build/tests/testsuite.dir/at-groups/438/stdout
    2019-09-05 20:30:37.887257545 +0000
    @@ -1 +1,2 @@
     syntax error
    +calc.cc:1652:50: runtime error: load of value 190, which is not a valid 
value for type 'bool'
    438. calc.at:867: 438. Calculator glr.cc  (calc.at:867): FAILED 
(calc.at:867)

The problem is that yylookaheadNeeds is not initialized in
yyinitStateSet, and when it is copied, the value is not 0 or 1.

* data/skeletons/glr.c (yylookaheadNeeds): Initialize yylookaheadNeeds.
---
 data/skeletons/glr.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/data/skeletons/glr.c b/data/skeletons/glr.c
index 55cf3830..7ef1a047 100644
--- a/data/skeletons/glr.c
+++ b/data/skeletons/glr.c
@@ -1094,17 +1094,20 @@ yyinitStateSet (yyGLRStateSet* yyset)
 {
   yyset->yysize = 1;
   yyset->yycapacity = 16;
-  yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
+  yyset->yystates
+    = (yyGLRState**) YYMALLOC (yyset->yycapacity * sizeof yyset->yystates[0]);
   if (! yyset->yystates)
     return yyfalse;
   yyset->yystates[0] = YY_NULLPTR;
-  yyset->yylookaheadNeeds =
-    (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
+  yyset->yylookaheadNeeds
+    = (yybool*) YYMALLOC (yyset->yycapacity * sizeof 
yyset->yylookaheadNeeds[0]);
   if (! yyset->yylookaheadNeeds)
     {
       YYFREE (yyset->yystates);
       return yyfalse;
     }
+  memset (yyset->yylookaheadNeeds,
+          0, yyset->yycapacity * sizeof yyset->yylookaheadNeeds[0]);
   return yytrue;
 }
 
-- 
2.23.0