From: hanachin@gmail.com
To: ruby-core@ruby-lang.org
Subject: [ruby-core:68440] [Ruby trunk - Bug #10929] NilClass#to_proc and & don't mix?
Date: Fri, 06 Mar 2015 13:00:48 +0000 [thread overview]
Message-ID: <redmine.journal-51787.20150306130048.d2b8ae79eb6fabf5@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-10929.20150302234342@ruby-lang.org
Issue #10929 has been updated by Seiei Higa.
File block_from_nil.patch added
I wrote a patch for this issue.
```diff
diff --git bootstraptest/test_block.rb bootstraptest/test_block.rb
index cdc5960..4347fdd 100644
--- bootstraptest/test_block.rb
+++ bootstraptest/test_block.rb
@@ -611,3 +611,17 @@ assert_equal 'ok', %q{
end
'ok'
}
+
+assert_equal 'ok', %q{
+ class NilClass
+ def to_proc
+ Proc.new {|x| x }
+ end
+ end
+
+ def foo(&blk)
+ blk.call('ok')
+ end
+
+ foo(&nil)
+}, '[ruby-core:68384] [Bug #10929]'
diff --git vm_args.c vm_args.c
index cf7256b..e1cb8ac 100644
--- vm_args.c
+++ vm_args.c
@@ -755,7 +755,7 @@ vm_caller_setup_arg_block(const rb_thread_t *th, rb_control_frame_t *reg_cfp, rb
proc = *(--reg_cfp->sp);
- if (proc != Qnil) {
+ if (proc != Qnil || rb_respond_to(Qnil, idTo_proc)) {
if (!rb_obj_is_proc(proc)) {
VALUE b;
```
----------------------------------------
Bug #10929: NilClass#to_proc and & don't mix?
https://bugs.ruby-lang.org/issues/10929#change-51787
* Author: Thomas Sawyer
* Status: Open
* Priority: Low
* Assignee:
* ruby -v: ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------
This is sort of like a "who would ever care" kind of bug. Nonetheless technically it seems like it is one. So I thought it best that I report it just the same.
~~~
class NilClass
def to_proc
Proc.new{ |*x| nil }
end
end
def f(&b)
b.call(1)
end
f(&nil)
=> NoMethodError: undefined method `call' for nil:NilClass
~~~
(Maybe it was fixed already. Filing out this issue reminded me I need to update my version of Ruby.)
---Files--------------------------------
block_from_nil.patch (771 Bytes)
--
https://bugs.ruby-lang.org/
next prev parent reply other threads:[~2015-03-06 12:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <redmine.issue-10929.20150302234342@ruby-lang.org>
2015-03-02 23:43 ` [ruby-core:68384] [Ruby trunk - Bug #10929] [Open] NilClass#to_proc and & don't mix? transfire
2015-03-06 13:00 ` hanachin [this message]
2015-03-08 22:43 ` [ruby-core:68462] [Ruby trunk - Bug #10929] " ko1
2019-12-16 15:15 ` [ruby-core:96270] [Ruby master Bug#10929] " mame
2020-01-14 2:31 ` [ruby-core:96829] " ko1
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