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Syntax error with &.< in combination with other operators #3763

Papierkorb opened this Issue Mar 28, 2016 · 1 comment


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while testing my Ruby 2.3 application with JRuby master I noticed it throwing a syntax error when using &. on an operator.

Example code

# Test case giving unexpected behaviour:
{ foo: 1 }.reject{|_, value| false || value&.<(0)}
#=> SyntaxError: unexpected tLPAREN

# Removing the `false ||`
{ foo: 1 }.reject{|_, value| value&.<(0)}
#=> { foo: 1 } # This one works!

# Adding parantheses
{ foo: 1 }.reject{|_, value| false || (value&.<(0))}
#=> { foo: 1 } # This one works too!

On MRI 2.3.0p0 all reject lines give the same, expected result. On JRuby, the first line fails with a SyntaxError.


Expected Behavior

All lines return { foo: 1 }

Actual Behavior

The first gives a SyntaxError


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enebo Mar 29, 2016


reduced to eliminate block:


enebo commented Mar 29, 2016

reduced to eliminate block:


@enebo enebo added the parser label Mar 29, 2016

@enebo enebo added this to the JRuby milestone Mar 29, 2016

@enebo enebo closed this in f2ab40c Mar 29, 2016

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