Do not run tests that use integers in versions with compiler that do not support them.

test cases/d/13 declare dep/meson.build

diff --git a/test cases/d/13 declare dep/meson.build b/test cases/d/13 declare dep/meson.build
index eef9816..2293934 100644
--- a/test cases/d/13 declare dep/meson.build
+++ b/test cases/d/13 declare dep/meson.build
@@ -3,7 +3,7 @@
 )
 
 my_dep = declare_dependency(
-    d_module_versions: ['TestVersion', 1],
+    d_module_versions: ['TestVersion'],
     d_import_dirs: include_directories('views'),
 )
 

test cases/d/9 features/meson.build

diff --git a/test cases/d/9 features/meson.build b/test cases/d/9 features/meson.build
index 06f0341..c64fb3d 100644
--- a/test cases/d/9 features/meson.build
+++ b/test cases/d/9 features/meson.build
@@ -1,5 +1,15 @@
 project('D Features', 'd', default_options : ['debug=false'])
 
+dc = meson.get_compiler('d')
+
+# GDC 13 hard errors if options are given number values.
+# https://github.com/mesonbuild/meson/pull/11996
+if dc.get_id() == 'gdc' and dc.version().version_compare('>=13')
+    number_options_supported = true
+else
+    number_options_supported = false
+endif
+
 # ONLY FOR BACKWARDS COMPATIBILITY.
 # DO NOT DO THIS IN NEW CODE!
 # USE include_directories() INSTEAD OF BUILDING
@@ -46,12 +56,13 @@
 test('dapp_test', e_test)
 
 # test version level
-e_version_int = executable('dapp_version_int',
-    test_src,
-    d_import_dirs: [data_dir],
-    d_module_versions: ['With_VersionInteger', 3],
-)
-test('dapp_version_int_t', e_version_int, args: ['debug'])
+if number_options_supported
+    e_version_int = executable('dapp_version_int',
+        test_src,
+        d_import_dirs: [data_dir],
+       d_module_versions: ['With_VersionInteger', 3],
+    )
+    test('dapp_version_int_t', e_version_int, args: ['debug'])
 
 # test version level failure
 e_version_int_fail = executable('dapp_version_int_fail',
@@ -60,6 +71,7 @@
     d_module_versions: ['With_VersionInteger', 2],
 )
 test('dapp_version_int_t_fail', e_version_int_fail, args: ['debug'], should_fail: true)
+endif
 
 # test debug conditions: disabled
 e_no_debug = executable('dapp_no_debug',
@@ -69,23 +81,34 @@
 )
 test('dapp_no_debug_t_fail', e_no_debug, args: ['debug'], should_fail: true)
 
-# test debug conditions: enabled
-e_debug = executable('dapp_debug',
-    test_src,
-    d_import_dirs: [data_dir],
-    d_module_versions: ['With_Debug'],
-    d_debug: 1,
-)
-test('dapp_debug_t', e_debug, args: ['debug'])
+if number_options_supported
+    # test debug conditions: enabled
+    e_debug = executable('dapp_debug',
+        test_src,
+        d_import_dirs: [data_dir],
+        d_module_versions: ['With_Debug'],
+        d_debug: 1,
+    )
+    test('dapp_debug_t', e_debug, args: ['debug'])
 
-# test debug conditions: integer
-e_debug_int = executable('dapp_debug_int',
-    test_src,
-    d_import_dirs: [data_dir],
-    d_module_versions: ['With_DebugInteger'],
-    d_debug: 3,
-)
-test('dapp_debug_int_t', e_debug_int, args: ['debug'])
+    # test debug conditions: integer
+    e_debug_int = executable('dapp_debug_int',
+        test_src,
+        d_import_dirs: [data_dir],
+        d_module_versions: ['With_DebugInteger'],
+        d_debug: 3,
+    )
+    test('dapp_debug_int_t', e_debug_int, args: ['debug'])
+
+    # test with all debug conditions at once, and with redundant values
+    e_debug_all = executable('dapp_debug_all',
+        test_src,
+        d_import_dirs: [data_dir],
+        d_module_versions: ['With_DebugAll'],
+        d_debug: ['4', 'DebugIdentifier', 2, 'DebugIdentifierUnused'],
+    )
+    test('dapp_debug_all_t', e_debug_all, args: ['debug'])
+endif
 
 # test debug conditions: identifier
 e_debug_ident = executable('dapp_debug_ident',
@@ -95,12 +118,3 @@
     d_debug: 'DebugIdentifier',
 )
 test('dapp_debug_ident_t', e_debug_ident, args: ['debug'])
-
-# test with all debug conditions at once, and with redundant values
-e_debug_all = executable('dapp_debug_all',
-    test_src,
-    d_import_dirs: [data_dir],
-    d_module_versions: ['With_DebugAll'],
-    d_debug: ['4', 'DebugIdentifier', 2, 'DebugIdentifierUnused'],
-)
-test('dapp_debug_all_t', e_debug_all, args: ['debug'])