testsuite: Fix omit_ways usage

omit_ways expects a list but this was broken in several cases.

testsuite/driver/testlib.py

@@ -274,6 +274,7 @@ def omit_ways( ways ):
     return lambda name, opts, w=ways: _omit_ways( name, opts, w )
 
 def _omit_ways( name, opts, ways ):
+    assert ways.__class__ is list
     opts.omit_ways += ways
 
 # -----

testsuite/tests/concurrent/should_run/all.T

@@ -239,7 +239,7 @@ test('conc067', ignore_stdout, compile_and_run, [''])
 
 # omit threaded2, the behaviour of this test is non-deterministic with more
 # than one CPU.
-test('conc068', [ omit_ways('threaded2'), exit_code(1) ], compile_and_run, [''])
+test('conc068', [ omit_ways(['threaded2']), exit_code(1) ], compile_and_run, [''])
 
 test('setnumcapabilities001',
      [ only_ways(['threaded1','threaded2']),

testsuite/tests/lib/integer/all.T

 test('integerBits', normal, compile_and_run, [''])
 test('integerConversions', normal, compile_and_run, [''])
 # skip ghci as it doesn't support unboxed tuples
-test('integerGmpInternals', [reqlib('integer-gmp'), omit_ways('ghci')], compile_and_run, [''])
-test('plusMinusInteger', [omit_ways('ghci')], compile_and_run, [''])
+test('integerGmpInternals', [reqlib('integer-gmp'), omit_ways(['ghci'])], compile_and_run, [''])
+test('plusMinusInteger', [omit_ways(['ghci'])], compile_and_run, [''])
 test('integerConstantFolding', normal, makefile_test, ['integerConstantFolding'])
 test('fromToInteger', [], makefile_test, ['fromToInteger'])
 test('IntegerConversionRules', [], makefile_test, ['IntegerConversionRules'])

testsuite/tests/programs/barton-mangler-bug/test.T

@@ -8,7 +8,7 @@ test('barton-mangler-bug',
                    'Plot.hi',              'Plot.o',
                    'PlotExample.hi',       'PlotExample.o',
                    'TypesettingTricks.hi', 'TypesettingTricks.o']),
-      omit_ways('debug') # Fails for debug way due to annotation linting timeout
+      omit_ways(['debug']) # Fails for debug way due to annotation linting timeout
       ],
      multimod_compile_and_run, ['Main', ''])
 

testsuite/tests/rts/all.T

@@ -93,7 +93,7 @@ test('stack002', [extra_files(['stack001.hs']),
 
 # run this test with very small stack chunks to exercise the stack
 # overflow/underflow machinery.
-test('stack003', [ omit_ways('ghci'), # uses unboxed tuples
+test('stack003', [ omit_ways(['ghci']), # uses unboxed tuples
                    extra_run_opts('500000 +RTS -kc1k -kb100 -K96m -RTS') ],
                  compile_and_run, [''])
 

testsuite/tests/typecheck/should_run/all.T

@@ -96,7 +96,7 @@ test('T6117', normal, compile_and_run, [''])
 test('T5751', normal, compile_and_run, [''])
 test('T5913', normal, compile_and_run, [''])
 test('T7748', normal, compile_and_run, [''])
-test('T7861', [omit_ways('debug'), exit_code(1)], compile_and_run, [''])
+test('T7861', [omit_ways(['debug']), exit_code(1)], compile_and_run, [''])
 test('TcTypeNatSimpleRun', normal, compile_and_run, [''])
 test('TcTypeSymbolSimpleRun', normal, compile_and_run, [''])
 test('T8119', normal, ghci_script, ['T8119.script'])

testsuite/tests/utils/should_run/all.T

 test('T14854',
      [only_ways(threaded_ways),
-      omit_ways('ghci'),
+      omit_ways(['ghci']),
       reqlib('random'),
       ignore_stderr],
      compile_and_run,