Fix off-by-one error

Simon pointed out that commit a2bbca9fa5e ("Use std::vector<bool> for
agent_expr::reg_mask") caused a regression in libstdc++ debug mode.
This was due to an off-by-one error in a vector resize.  This patch
fixes the problem.

diff --git a/gdb/ax-general.c b/gdb/ax-general.c
index 3c724a0e38ba24178038fcbc29903fa4ad1f985f..26a27a0bcadc95b6097055c60428f519a5e8bca3 100644 (file)
--- a/gdb/ax-general.c
+++ b/gdb/ax-general.c
@@ -414,7 +414,7 @@ ax_reg_mask (struct agent_expr *ax, int reg)
 
       /* Grow the bit mask if necessary.  */
       if (reg >= ax->reg_mask.size ())
-       ax->reg_mask.resize (reg);
+       ax->reg_mask.resize (reg + 1);
 
       ax->reg_mask[reg] = true;
     }