Formatter bug on 1.6.0-rc0

[MSch]

Was trying to test if formatting our code base with the formatter from 1.6.0-rc0 works.

Before:

Enum.each(& :ok = A.b(nil, {:c, &1}))

After:

Enum.each((&:ok) = A.b(nil, {:c, &1}))

Needless to say, this doesn't compile any more.

[josevalim]

@MSch both before and after do not compile here locally:

iex(2)> Enum.each(& :ok = A.b(nil, {:c, &1}))
** (CompileError) iex:2: unhandled &1 outside of a capture
    (stdlib) lists.erl:1354: :lists.mapfoldl/3
    (stdlib) lists.erl:1355: :lists.mapfoldl/3

and

iex(2)> Enum.each((&:ok) = A.b(nil, {:c, &1}))
** (CompileError) iex:2: unhandled &1 outside of a capture
    (stdlib) lists.erl:1354: :lists.mapfoldl/3
    (stdlib) lists.erl:1355: :lists.mapfoldl/3

what am I missing? :)

[MSch]

Ah, just checked: It compiles (for me) on 1.5.2-otp-20 but not on 1.6.

I don't know if it should compile though :)

[josevalim]

@MSch hrm. I think there was a bug fix on this area because of the precedence of |. I will investigate.

[MSch]

@josevalim ❤️