[binutils-gdb/users/hjl/linux/master] gdb/guile: Do not error when trying to create empty array.

[H.J.Lu <hjl at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=fce10a8494efa8faec67b718f25e06d3d71694b3

commit fce10a8494efa8faec67b718f25e06d3d71694b3
Author: Joel Brobecker <brobecker@adacore.com>
Date:   Tue Jan 6 18:37:53 2015 +0400

    gdb/guile: Do not error when trying to create empty array.
    
    This fixes a similar error as in the Python support code where
    trying to create an empty array.
    
    In guile/scm-type.c::tyscm_array_1, the funtion raises an exception
    if N2 < N1:
    
       if (n2 < n1)
         {
           gdbscm_out_of_range_error (func_name, SCM_ARG3,
    
    But it should be doing so if N2 == N1 - 1, since that would simply
    be an empty array, not an array with a negative length.
    
    gdb/ChangeLog:
    
            * guile/scm-type.c (tyscm_array_1): Do not raise out-of-range
            error if N2 is equal to N1 - 1.

Diff:
---
 gdb/ChangeLog        | 5 +++++
 gdb/guile/scm-type.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a6211bf..8e3737d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2015-01-06  Joel Brobecker  <brobecker@adacore.com>
 
+	* guile/scm-type.c (tyscm_array_1): Do not raise out-of-range
+	error if N2 is equal to N1 - 1.
+
+2015-01-06  Joel Brobecker  <brobecker@adacore.com>
+
 	* python/py-type.c (typy_array_1): Do not raise negative-length
 	exception if N2 is equal to N1 - 1.
 
diff --git a/gdb/guile/scm-type.c b/gdb/guile/scm-type.c
index 92d5328..4f46139 100644
--- a/gdb/guile/scm-type.c
+++ b/gdb/guile/scm-type.c
@@ -713,7 +713,7 @@ tyscm_array_1 (SCM self, SCM n1_scm, SCM n2_scm, int is_vector,
       n1 = 0;
     }
 
-  if (n2 < n1)
+  if (n2 < n1 - 1)
     {
       gdbscm_out_of_range_error (func_name, SCM_ARG3,
 				 scm_cons (scm_from_long (n1),