[Bug #2776] can't return from lambda with outer block

SSwanabe · February 21, 2010, 11:44pm

Bug #2776: can’t return from lambda with outer block
http://redmine.ruby-lang.org/issues/show/2776

e$B5/I<<Te(B: _ wanabe
e$B%9%F!<%?%9e(B: Open, e$BM%@hEYe(B: Low
e$BC4Ev<Te(B: Koichi Sasada, e$B%+%F%4%je(B: core, Target version: 1.9.x
ruby -v: ruby 1.9.2dev (2010-02-21 trunk 26722) [i686-linux]

http://pc12.2ch.net/test/read.cgi/tech/1264635554/685
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test.rb

class Foo
def initialize(&func)
@func = lambda(&func)
end
def bar(x)
@func.call(x)
end
end
foo = Foo.new{ |x| return x**2 }
p foo.bar(2)

$ ruby1.8 -v test.rb
ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux]
4

$ ./ruby -v test.rb
ruby 1.9.2dev (2010-02-21 trunk 26722) [i686-linux]
test.rb:9:in block in <main>': unexpected return (LocalJumpError) from test.rb:6:in call’
from test.rb:6:in bar' from test.rb:10:in ’

SSwanabe · February 22, 2010, 5:14am

e$B%A%1%C%He(B #2776 e$B$,99?7$5$l$^$7$?!#e(B (by Shyouhei U.)

e$BC4Ev<Te(B Koichi Sasadae$B$+$ie(BYukihiro M.e$B$KJQ99e(B

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lambda(&proc)

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http://redmine.ruby-lang.org/issues/show/2776

SSwanabe · February 22, 2010, 6:38am

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At Mon, 22 Feb 2010 13:13:47 +0900,
Shyouhei U. wrote in [ruby-dev:40454]:

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Index: proc.c

— proc.c (revision 26728)
+++ proc.c (working copy)
@@ -401,12 +401,15 @@ proc_new(VALUE klass, int is_lambda)

 if (procval) {

rb_proc_t *proc;
if (RBASIC(procval)->klass == klass) {

```
 return procval;
```
}
else {
```
 VALUE newprocval = proc_dup(procval);
```
```
 RBASIC(newprocval)->klass = klass;
```
```
 return newprocval;
```

```
 GetProcPtr(procval, proc);
```

 if ((proc->is_lambda != 0) == (is_lambda != 0))

return procval;
}
procval = proc_dup(procval);
RBASIC(procval)->klass = klass;
GetProcPtr(procval, proc);
proc->is_lambda = is_lambda ? TRUE : FALSE;
return procval;
}

SSwanabe · February 22, 2010, 7:02am

2010e$BG/e(B2e$B7ne(B22e$BF|e(B14:37 Nobuyoshi N.
[email protected]:

lambda(&proc) e$B$Ge(Bproce$B$re(Blambdae$B$KJQ49$G$-$k$+$I$&$+$N0c$$e(B?

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SSwanabe · February 22, 2010, 11:31am

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At Mon, 22 Feb 2010 15:00:34 +0900,
Tanaka A. wrote in [ruby-dev:40456]:

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SSwanabe · February 22, 2010, 1:45pm

2010e$BG/e(B2e$B7ne(B22e$BF|e(B19:29 Nobuyoshi N.
[email protected]:

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return
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% ./ruby -ve ’
def m(&b)
p yield
2
end
def n
l = lambda { return 1 }
m(&l)
end
p n
’
ruby 1.9.2dev (2010-02-22 trunk 26728) [i686-linux]
1

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SSwanabe · March 1, 2010, 3:11pm

e$B%A%1%C%He(B #2776 e$B$,99?7$5$l$^$7$?!#e(B (by _ wanabe)

e$B%9%F!<%?%9e(B Opene$B$+$ie(BRejectede$B$KJQ99e(B

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