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Test specifically for things that cop_features broke
__END__
# NAME check clearing $^H clears the bits
use feature 'say';
BEGIN { %^H = () }
say "Fail";
EXPECT
String found where operator expected at - line 3, near "say "Fail""
(Do you need to predeclare say?)
syntax error at - line 3, near "say "Fail""
Execution of - aborted due to compilation errors.
########
# NAME check copying $^H restores the bits
use feature 'say';
say "Hello";
BEGIN { our %work = %^H; }
no feature 'say';
BEGIN { %^H = our %work }
say "Goodbye";
EXPECT
Hello
Goodbye
########
# NAME check deleting entries (via feature.pm) clears the bits
use feature 'say';
say "Hello";
no feature 'say';
say "Goodbye";
EXPECT
String found where operator expected at - line 4, near "say "Goodbye""
(Do you need to predeclare say?)
syntax error at - line 4, near "say "Goodbye""
Execution of - aborted due to compilation errors.
########
# NAME check deleting entries (bypass feature.pm) clears the bits
use feature 'say';
say "Hello";
BEGIN { delete $^H{feature_say}; }
say "Goodbye";
EXPECT
String found where operator expected at - line 4, near "say "Goodbye""
(Do you need to predeclare say?)
syntax error at - line 4, near "say "Goodbye""
Execution of - aborted due to compilation errors.
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