Bug #17727
closed
Unexpected syntax error when passing hash to **arg with kwarg
Description
Background¶
Given a method that takes a kwarg and a **positional_arg it throws an unexpected syntax error if you pass it an intact hash. This happens when you call the method, but also when you declare the method if it is multi-line.
def foo(a:, **b)
[a,b]
end
Expectation¶
If you call this method without deconstructing the hash passed to the second argument first I would expect a message indicating that you need to deconstruct the hash first.
Steps to reproduce¶
Instead it throws a syntax error:
foo(a: '1', {b: 2})
SyntaxError: unexpected ')', expecting =>
foo(a: '1', {b: 2})
^
Passing case when you deconstruct the hash first:
foo(a: '1', **{b: 2})
=> ["1", {:b=>2}]
But wondering if there's something else going on because you get a different error when defining this case on multiple lines. If you're trying to run this in a repl environment it won't even let you complete the method call.
from repl:
foo(
a: '1',
{b: 2}
SyntaxError: unexpected '\n', expecting =>
passing case:
foo(
a: '1',
**{b:1}
)
=> ["1", {:b=>1}]
Attached is a ruby script to reproduce the above cases.
Files
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