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segv with debug_inspector and tracepoint
require "debug_inspector"
class Foo
def meth1(&block)
RubyVM::DebugInspector.open do |dc|
iseq = dc.frame_iseq(2)
trace = TracePoint.new(:b_return) do |tp|
pp tp
tp.disable
end
trace.enable(target: iseq)
end
end
def meth2
Object.new.tap do |_|
meth1
meth1
end
GC.start
GC.start
end
end
Foo.new.meth2
@joker1007
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segv_with_debug_inspector_and_tracepoint.rb:20: [BUG] Segmentation fault at 0x0000000000000000
ruby 2.7.0preview1 (2019-05-31 trunk c55db6aa271df4a689dc8eb0039c929bf6ed43ff) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0004 p:---- s:0014 e:000013 CFUNC  :start
c:0003 p:0026 s:0010 E:0003d0 METHOD segv_with_debug_inspector_and_tracepoint.rb:20
c:0002 p:0028 s:0006 E:001a80 EVAL   segv_with_debug_inspector_and_tracepoint.rb:25 [FINISH]
c:0001 p:0000 s:0003 E:001580 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
segv_with_debug_inspector_and_tracepoint.rb:25:in `<main>'
segv_with_debug_inspector_and_tracepoint.rb:20:in `meth2'
segv_with_debug_inspector_and_tracepoint.rb:20:in `start'

-- Machine register context ------------------------------------------------
 RIP: 0x00007f355f9d91ee RBP: 0x000000000001a400 RSP: 0x00007ffc74ce2060
 RAX: 0x0000000000000000 RBX: 0x0000000000000020 RCX: 0x0000000001345ae0
 RDX: 0x00000000000000e1 RDI: 0x0000000001346240 RSI: 0x0000000000000020
  R8: 0x0000000008000000  R9: 0x0000000000000000 R10: 0x0000000000006189
 R11: 0x0000000001383fe0 R12: 0x00000000013466b8 R13: 0x0000000001346240
 R14: 0x0000000001346240 R15: 0x000000000144b580 EFL: 0x0000000000010246

-- C level backtrace information -------------------------------------------
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(rb_vm_bugreport+0x197) [0x7f355fb54727]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0xb0d64) [0x7f355f9b5d64]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0x1ba9e0) [0x7f355fabf9e0]
/lib64/libpthread.so.0(__restore_rt+0x0) [0x7f355f4e1480]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0xd41ee) [0x7f355f9d91ee]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0x2501f9) [0x7f355fb551f9]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0xd3a7e) [0x7f355f9d8a7e]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0xd14b9) [0x7f355f9d64b9]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0xc94cc) [0x7f355f9ce4cc]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0xce660) [0x7f355f9d3660]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0x242730) [0x7f355fb47730]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0x241bb7) [0x7f355fb46bb7]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(0x22c224) [0x7f355fb31224]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(rb_vm_exec+0x918) [0x7f355fb431a8]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(ruby_exec_node+0x141) [0x7f355f9bce11]
/home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7(ruby_run_node+0x22) [0x7f355f9bccb2]
ruby(0x4009d1) [0x4009d1]
/lib64/libc.so.6(__libc_start_main+0xe7) [0x7f355e4f0e77]
ruby(_start+0x2a) [0x4008aa]

-- Other runtime information -----------------------------------------------

* Loaded script: segv_with_debug_inspector_and_tracepoint.rb

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
    5 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
    6 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/rbconfig.rb
    7 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/compatibility.rb
    8 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/defaults.rb
    9 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/deprecate.rb
   10 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/errors.rb
   11 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/path_support.rb
   12 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/version.rb
   13 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/requirement.rb
   14 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/platform.rb
   15 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/basic_specification.rb
   16 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/stub_specification.rb
   17 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/delegate.rb
   18 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/rfc2396_parser.rb
   19 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/rfc3986_parser.rb
   20 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/common.rb
   21 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/generic.rb
   22 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/file.rb
   23 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/ftp.rb
   24 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/http.rb
   25 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/https.rb
   26 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/ldap.rb
   27 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/ldaps.rb
   28 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri/mailto.rb
   29 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/uri.rb
   30 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/util.rb
   31 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/text.rb
   32 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/user_interaction.rb
   33 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/specification_policy.rb
   34 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/util/list.rb
   35 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/stringio.so
   36 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/specification.rb
   37 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/exceptions.rb
   38 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/bundler_version_finder.rb
   39 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/dependency.rb
   40 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/core_ext/kernel_gem.rb
   41 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/monitor.rb
   42 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb
   43 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems/core_ext/kernel_warn.rb
   44 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/rubygems.rb
   45 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/version.rb
   46 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/core_ext/name_error.rb
   47 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/levenshtein.rb
   48 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/jaro_winkler.rb
   49 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checker.rb
   50 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
   51 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
   52 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checkers/name_error_checkers.rb
   53 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checkers/method_name_checker.rb
   54 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checkers/key_error_checker.rb
   55 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/spell_checkers/null_checker.rb
   56 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean/formatters/plain_formatter.rb
   57 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/did_you_mean-1.3.0/lib/did_you_mean.rb
   58 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/debug_inspector-0.0.3/lib/debug_inspector.so
   59 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/debug_inspector-0.0.3/lib/debug_inspector.rb
   60 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/prettyprint.rb
   61 /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/pp.rb

* Process memory map:

00400000-00401000 r-xp 00000000 103:05 7879440                           /home/joker/.rbenv/versions/2.7.0-preview1/bin/ruby
00600000-00601000 r--p 00000000 103:05 7879440                           /home/joker/.rbenv/versions/2.7.0-preview1/bin/ruby
00601000-00602000 rw-p 00001000 103:05 7879440                           /home/joker/.rbenv/versions/2.7.0-preview1/bin/ruby
01344000-01800000 rw-p 00000000 00:00 0                                  [heap]
7f355b1bb000-7f355b542000 r--s 00000000 103:05 7879441                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7.0
7f355b542000-7f355b558000 r-xp 00000000 103:05 1717229                   /usr/lib64/gcc/x86_64-pc-linux-gnu/8.2.0/libgcc_s.so.1
7f355b558000-7f355b758000 ---p 00016000 103:05 1717229                   /usr/lib64/gcc/x86_64-pc-linux-gnu/8.2.0/libgcc_s.so.1
7f355b758000-7f355b759000 r--p 00016000 103:05 1717229                   /usr/lib64/gcc/x86_64-pc-linux-gnu/8.2.0/libgcc_s.so.1
7f355b759000-7f355b75a000 rw-p 00017000 103:05 1717229                   /usr/lib64/gcc/x86_64-pc-linux-gnu/8.2.0/libgcc_s.so.1
7f355b75a000-7f355b75c000 r-xp 00000000 103:05 9574090                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/debug_inspector-0.0.3/lib/debug_inspector.so
7f355b75c000-7f355b95b000 ---p 00002000 103:05 9574090                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/debug_inspector-0.0.3/lib/debug_inspector.so
7f355b95b000-7f355b95c000 r--p 00001000 103:05 9574090                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/debug_inspector-0.0.3/lib/debug_inspector.so
7f355b95c000-7f355b95d000 rw-p 00002000 103:05 9574090                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/gems/2.7.0/gems/debug_inspector-0.0.3/lib/debug_inspector.so
7f355b95d000-7f355b964000 r-xp 00000000 103:05 9978298                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/stringio.so
7f355b964000-7f355bb64000 ---p 00007000 103:05 9978298                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/stringio.so
7f355bb64000-7f355bb65000 r--p 00007000 103:05 9978298                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/stringio.so
7f355bb65000-7f355bb66000 rw-p 00008000 103:05 9978298                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/stringio.so
7f355bb66000-7f355bb68000 r-xp 00000000 103:05 11551316                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7f355bb68000-7f355bd67000 ---p 00002000 103:05 11551316                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7f355bd67000-7f355bd68000 r--p 00001000 103:05 11551316                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7f355bd68000-7f355bd69000 rw-p 00002000 103:05 11551316                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7f355bd69000-7f355bd6b000 r-xp 00000000 103:05 11162311                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7f355bd6b000-7f355bf6a000 ---p 00002000 103:05 11162311                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7f355bf6a000-7f355bf6b000 r--p 00001000 103:05 11162311                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7f355bf6b000-7f355bf6c000 rw-p 00002000 103:05 11162311                  /home/joker/.rbenv/versions/2.7.0-preview1/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7f355bf6c000-7f355df75000 rw-p 00000000 00:00 0 
7f355df75000-7f355e4cf000 r--p 00000000 103:05 7097391                   /usr/lib64/locale/locale-archive
7f355e4cf000-7f355e68f000 r-xp 00000000 103:05 1723246                   /lib64/libc-2.28.so
7f355e68f000-7f355e88f000 ---p 001c0000 103:05 1723246                   /lib64/libc-2.28.so
7f355e88f000-7f355e893000 r--p 001c0000 103:05 1723246                   /lib64/libc-2.28.so
7f355e893000-7f355e895000 rw-p 001c4000 103:05 1723246                   /lib64/libc-2.28.so
7f355e895000-7f355e899000 rw-p 00000000 00:00 0 
7f355e899000-7f355ea11000 r-xp 00000000 103:05 1722889                   /lib64/libm-2.28.so
7f355ea11000-7f355ec10000 ---p 00178000 103:05 1722889                   /lib64/libm-2.28.so
7f355ec10000-7f355ec11000 r--p 00177000 103:05 1722889                   /lib64/libm-2.28.so
7f355ec11000-7f355ec12000 rw-p 00178000 103:05 1722889                   /lib64/libm-2.28.so
7f355ec12000-7f355ec1b000 r-xp 00000000 103:05 1723025                   /lib64/libcrypt-2.28.so
7f355ec1b000-7f355ee1a000 ---p 00009000 103:05 1723025                   /lib64/libcrypt-2.28.so
7f355ee1a000-7f355ee1b000 r--p 00008000 103:05 1723025                   /lib64/libcrypt-2.28.so
7f355ee1b000-7f355ee1c000 rw-p 00009000 103:05 1723025                   /lib64/libcrypt-2.28.so
7f355ee1c000-7f355ee4a000 rw-p 00000000 00:00 0 
7f355ee4a000-7f355ee4d000 r-xp 00000000 103:05 1722902                   /lib64/libdl-2.28.so
7f355ee4d000-7f355f04c000 ---p 00003000 103:05 1722902                   /lib64/libdl-2.28.so
7f355f04c000-7f355f04d000 r--p 00002000 103:05 1722902                   /lib64/libdl-2.28.so
7f355f04d000-7f355f04e000 rw-p 00003000 103:05 1722902                   /lib64/libdl-2.28.so
7f355f04e000-7f355f0c4000 r-xp 00000000 103:05 1976975                   /usr/lib64/libgmp.so.10.3.2
7f355f0c4000-7f355f2c3000 ---p 00076000 103:05 1976975                   /usr/lib64/libgmp.so.10.3.2
7f355f2c3000-7f355f2c4000 r--p 00075000 103:05 1976975                   /usr/lib64/libgmp.so.10.3.2
7f355f2c4000-7f355f2c5000 rw-p 00076000 103:05 1976975                   /usr/lib64/libgmp.so.10.3.2
7f355f2c5000-7f355f2cc000 r-xp 00000000 103:05 1722939                   /lib64/librt-2.28.so
7f355f2cc000-7f355f4cb000 ---p 00007000 103:05 1722939                   /lib64/librt-2.28.so
7f355f4cb000-7f355f4cc000 r--p 00006000 103:05 1722939                   /lib64/librt-2.28.so
7f355f4cc000-7f355f4cd000 rw-p 00007000 103:05 1722939                   /lib64/librt-2.28.so
7f355f4cd000-7f355f4e9000 r-xp 00000000 103:05 1720323                   /lib64/libpthread-2.28.so
7f355f4e9000-7f355f6e8000 ---p 0001c000 103:05 1720323                   /lib64/libpthread-2.28.so
7f355f6e8000-7f355f6e9000 r--p 0001b000 103:05 1720323                   /lib64/libpthread-2.28.so
7f355f6e9000-7f355f6ea000 rw-p 0001c000 103:05 1720323                   /lib64/libpthread-2.28.so
7f355f6ea000-7f355f6ee000 rw-p 00000000 00:00 0 
7f355f6ee000-7f355f704000 r-xp 00000000 103:05 685013                    /lib64/libz.so.1.2.11
7f355f704000-7f355f903000 ---p 00016000 103:05 685013                    /lib64/libz.so.1.2.11
7f355f903000-7f355f904000 r--p 00015000 103:05 685013                    /lib64/libz.so.1.2.11
7f355f904000-7f355f905000 rw-p 00016000 103:05 685013                    /lib64/libz.so.1.2.11
7f355f905000-7f355fc33000 r-xp 00000000 103:05 7879441                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7.0
7f355fc33000-7f355fe33000 ---p 0032e000 103:05 7879441                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7.0
7f355fe33000-7f355fe39000 r--p 0032e000 103:05 7879441                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7.0
7f355fe39000-7f355fe3c000 rw-p 00334000 103:05 7879441                   /home/joker/.rbenv/versions/2.7.0-preview1/lib/libruby.so.2.7.0
7f355fe3c000-7f355fe4e000 rw-p 00000000 00:00 0 
7f355fe4e000-7f355fe74000 r-xp 00000000 103:05 1723685                   /lib64/ld-2.28.so
7f355ff34000-7f3560039000 rw-p 00000000 00:00 0 
7f3560044000-7f3560069000 r--s 00000000 103:05 1720323                   /lib64/libpthread-2.28.so
7f3560069000-7f356006b000 r--s 00000000 103:05 7879440                   /home/joker/.rbenv/versions/2.7.0-preview1/bin/ruby
7f356006b000-7f3560072000 r--s 00000000 103:05 7077903                   /usr/lib64/gconv/gconv-modules.cache
7f3560072000-7f3560074000 rw-p 00000000 00:00 0 
7f3560074000-7f3560075000 r--p 00026000 103:05 1723685                   /lib64/ld-2.28.so
7f3560075000-7f3560076000 rw-p 00027000 103:05 1723685                   /lib64/ld-2.28.so
7f3560076000-7f3560077000 rw-p 00000000 00:00 0 
7ffc744e6000-7ffc74ce5000 rw-p 00000000 00:00 0                          [stack]
7ffc74d66000-7ffc74d69000 r--p 00000000 00:00 0                          [vvar]
7ffc74d69000-7ffc74d6b000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

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