[binutils-gdb] [gdb/build] Fix Wunused-variable in selftests::test_enumerate

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=cb345f65ba05b6e1de221adaf1b032efad8aed08

commit cb345f65ba05b6e1de221adaf1b032efad8aed08
Author: Tom de Vries <[email protected]>
Date:   Sat Apr 18 11:54:01 2026 +0200

    [gdb/build] Fix Wunused-variable in selftests::test_enumerate
    
    On openSUSE Leap 15.6, with gcc 7.5.0, I ran into:
    ...
    enumerate-selftests.c: In function 'void selftests::test_enumerate()':
    enumerate-selftests.c:85:22: error: \
      unused variable 'i' [-Werror=unused-variable]
         for (auto [i, val] : gdb::ranges::views::enumerate (vec))
                          ^
    cc1plus: all warnings being treated as errors
    ...
    
    Fix this by checking the value of i.
    
    Tested on x86_64-linux.

Diff:
---
 gdb/unittests/enumerate-selftests.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gdb/unittests/enumerate-selftests.c b/gdb/unittests/enumerate-selftests.c
index ddda29f6625..4ca85277fec 100644
--- a/gdb/unittests/enumerate-selftests.c
+++ b/gdb/unittests/enumerate-selftests.c
@@ -81,11 +81,17 @@ test_enumerate ()
   {
     std::vector<int> vec = { 1, 2, 3 };
     std::vector<int> expected = { 10, 20, 30 };
+    std::vector<int> actual_i;
+    std::vector<int> expected_i = { 0, 1, 2 };
 
     for (auto [i, val] : gdb::ranges::views::enumerate (vec))
-      val *= 10;
+      {
+	val *= 10;
+	actual_i.push_back (i);
+      }
 
     SELF_CHECK (vec == expected);
+    SELF_CHECK (actual_i == expected_i);
   }
 
   /* Test enumeration over an empty container.  */