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Bug #6039

closed

lambda vs proc; #to_ary w/ splat bug

Added by ddebernardy (Denis de Bernardy) over 9 years ago. Updated over 9 years ago.

Status:
Rejected
Priority:
Normal
Target version:
-
ruby -v:
1.9.3
Backport:
[ruby-core:42689]

Description

to_ary apparently gets called in edge cases when a proc has a splat argument:

good = Class.new do
def to_ary
[:bad]
end
end.new

foo = lambda { |*bar| bar.first }
foo.call(good)

foo = lambda { |bar, *baz| bar }
foo.call(good)

foo = proc { |*bar| bar.first }
foo.call(good)

foo = proc { |bar, *baz| bar }
foo.call(good)

RUBY_VERSION
=> "1.9.3"
good = Class.new do
?> def to_ary
[:bad]
end
end.new
=> #<#Class:0x00000100a39c50:0x00000100a399d0>

?> foo = lambda { |*bar| bar.first }
=> #
foo.call(good)
=> #<#Class:0x00000100a39c50:0x00000100a399d0>

?> foo = lambda { |bar, *baz| bar }
=> #
foo.call(good)
=> #<#Class:0x00000100a39c50:0x00000100a399d0>

?> foo = proc { |*bar| bar.first }
=> #Proc:0x000001009aed80@(irb):330
foo.call(good)
=> #<#Class:0x00000100a39c50:0x00000100a399d0>

?> foo = proc { |bar, *baz| bar }
=> #Proc:0x000001010102a0@(irb):333
foo.call(good)
=> :bad


Related issues

Related to Ruby master - Bug #5759: flatten calls to_ary on everythingRejectednobu (Nobuyoshi Nakada)12/14/2011Actions
Related to Ruby master - Bug #5694: Proc#arity doesn't take optional arguments into account. Closednobu (Nobuyoshi Nakada)12/01/2011Actions
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