From: Jeremy Kemper <redmine@...>
Date: 2009-02-01T03:28:59+09:00
Subject: [ruby-core:21696] [Bug #1079] failed autoload hangs the interpreter

Bug #1079: failed autoload hangs the interpreter
http://redmine.ruby-lang.org/issues/show/1079

Author: Jeremy Kemper
Status: Open, Priority: Normal
Target version: 1.9.1
Reproducible Version: trunk, ruby -v: ruby 1.9.1p5000 (2009-01-31 trunk 21909) [i386-darwin9.6.0]

# foo.rb
module Foo; end

# 1.8.7
>> module Bar; autoload :Foo, 'foo' end
=> nil
>> Bar::Foo
NameError: uninitialized constant Bar::Foo
	from (irb):3

# 1.9.1
>> module Bar; autoload :Foo, 'foo' end
=> nil
>> Bar::Foo
...

(gdb) run -e "module Bar; autoload :Foo, 'foo' end; puts Bar::Foo"
Starting program: /usr/local/ruby/1.9-trunk/bin/ruby -e "module Bar; autoload :Foo, 'foo' end; puts Bar::Foo"
Reading symbols for shared libraries +++... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
^C
Program received signal SIGINT, Interrupt.
file_expand_path (fname=2076620, dname=4, abs_mode=<value temporarily unavailable, due to optimizations>, result=4183520) at file.c:2734
2734		--p;
(gdb) bt
#0  file_expand_path (fname=2076620, dname=4, abs_mode=<value temporarily unavailable, due to optimizations>, result=4183520) at file.c:2734
#1  0x00032e1d in rb_get_expanded_load_path () at load.c:44
#2  0x00033380 in rb_feature_p (feature=0x1f84dc "foo", ext=0x1f84df "", rb=2, expanded=0, fn=0xbfffee48) at load.c:147
#3  0x000336a7 in rb_feature_provided (feature=0x1f84dc "foo", loading=0xbfffee48) at load.c:236
#4  0x000f0a47 in autoload_provided (arg=12787716) at variable.c:1396
#5  0x00030bf9 in rb_ensure (b_proc=0xf0a30 <autoload_provided>, data1=3221220936, e_proc=0xf0a50 <reset_safe>, data2=0) at eval.c:671
#6  0x000f0b67 in autoload_node (mod=<value temporarily unavailable, due to optimizations>, id=<value temporarily unavailable, due to optimizations>, noload=0) at variable.c:1429
#7  0x000f0bb3 in rb_autoload_load (klass=12787716, id=2354069) at variable.c:1442
#8  0x000f2839 in rb_const_get_0 (klass=2065720, id=3221220936, exclude=2, recurse=2) at variable.c:1475
#9  0x0010eebf in vm_exec_core (th=0x200740, initial=<value temporarily unavailable, due to optimizations>) at vm_insnhelper.c:1123
#10 0x001124bb in vm_exec (th=0x200740) at vm.c:1078
#11 0x001126cf in rb_iseq_eval_main (iseqval=2066680) at vm.c:1294
#12 0x000304a9 in ruby_exec_node (n=0x1f88f8, file=0x0) at eval.c:204
#13 0x00032b2e in ruby_run_node (n=0x1f88f8) at eval.c:232
#14 0x0000252f in main (argc=3, argv=0x200540) at main.c:35


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