Bug #21099: TestGc#test_gc_stress_at_startup assertion failure

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 3.5.0dev (2025-01-29T15:16:47Z master d3bb42776c) +PRISM [x86_64-darwin24]
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[sanjioh (Fabio Sangiovanni)]

Hi all,

I'm running macOS 15.2, and on my machine the test TestGc#test_gc_stress_at_startup results in an assertion failure.

These are my current configure flags:

../configure \
    --prefix="$SOURCEDIR/ruby_3.4.1" \
    --enable-debug-env \
    --enable-devel \
    cppflags="-DRUBY_DEBUG" \
    optflags="-O0 -fno-omit-frame-pointer"

make command line for running tests (invoked from the build directory):

make test-all TESTS="../test/ruby/test_gc.rb --name=TestGc#test_gc_stress_at_startup"

output:

Run options:
  --seed=7555
  "--ruby=./miniruby -I../lib -I. -I.ext/common  ../tool/runruby.rb --extout=.ext  -- --disable-gems"
  --excludes-dir=../test/.excludes
  --name=!/memory_leak/
  --name=TestGc#test_gc_stress_at_startup

# Running tests:

[1/1] TestGc#test_gc_stress_at_startup = 3.18 s
  1) Failure:
TestGc#test_gc_stress_at_startup [/Users/fabio/ruby_xcode/ruby/test/ruby/test_gc.rb:776]:
[Bug #15784]
pid 16632 killed by SIGABRT (signal 6)
| ../gc/default/default.c:1714: Assertion Failed: heap_add_poolpage:page->freelist != NULL
| ruby 3.5.0dev (2025-01-29T15:16:47Z master d3bb42776c) [x86_64-darwin24]
|
| -- Crash Report log information --------------------------------------------
|    See Crash Report log file in one of the following locations:
|      * ~/Library/Logs/DiagnosticReports
|      * /Library/Logs/DiagnosticReports
|    for more details.
| Don't forget to include the above Crash Report log file in bug reports.
|
| -- Control frame information -----------------------------------------------
| c:0001 p:---- s:0003 e:000002 DUMMY  [FINISH]
|
|
| -- Threading information ---------------------------------------------------
| Total ractor count: 0
| Ruby thread count for this ractor: 0
|
| -- C level backtrace information -------------------------------------------
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_print_backtrace+0x1d) [0x10515014d] /Users/fabio/ruby_xcode/ruby/build/../vm_dump.c:823
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_print_backtrace) (null):0
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_vm_bugreport+0x2c1) [0x105150431] /Users/fabio/ruby_xcode/ruby/build/../vm_dump.c:1155
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_assert_failure_detail+0x156) [0x104e41056] /Users/fabio/ruby_xcode/ruby/build/../error.c:1215
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_assert_failure_detail+0x0) [0x104e40f00] /Users/fabio/ruby_xcode/ruby/build/../error.c:1191
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_assert_failure) (null):0
| /Users/fabio/ruby_xcode/ruby/build/ruby(heap_add_poolpage+0xa9) [0x104e84ea9] ../gc/default/default.c:1714
| /Users/fabio/ruby_xcode/ruby/build/ruby(gc_sweep_step+0x204) [0x104e80224] ../gc/default/default.c:3941
| /Users/fabio/ruby_xcode/ruby/build/ruby(gc_sweep_rest+0x53) [0x104e7fff3] ../gc/default/default.c:3979
| /Users/fabio/ruby_xcode/ruby/build/ruby(gc_sweep+0x98) [0x104e7c418] ../gc/default/default.c:4151
| /Users/fabio/ruby_xcode/ruby/build/ruby(gc_start+0x5f9) [0x104e86159] ../gc/default/default.c:6472
| /Users/fabio/ruby_xcode/ruby/build/ruby(garbage_collect+0x2c) [0x104e87bbc] ../gc/default/default.c:6351
| /Users/fabio/ruby_xcode/ruby/build/ruby(garbage_collect_with_gvl+0xb4) [0x104e8dbc4] ../gc/default/default.c:6753
| /Users/fabio/ruby_xcode/ruby/build/ruby(objspace_malloc_gc_stress+0x8f) [0x104e8daff] ../gc/default/default.c:7996
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_gc_impl_malloc+0x49) [0x104e8d8f9] ../gc/default/default.c:8207
| /Users/fabio/ruby_xcode/ruby/build/ruby(ruby_xmalloc2_body+0x32) [0x104e76a82] /Users/fabio/ruby_xcode/ruby/build/../gc.c:4699
| /Users/fabio/ruby_xcode/ruby/build/ruby(ruby_xmalloc2+0x1d) [0x104e76a3d] /Users/fabio/ruby_xcode/ruby/build/../gc.c:4693
| /Users/fabio/ruby_xcode/ruby/build/ruby(pin_array_list_new+0x6f) [0x10511ab3f] /Users/fabio/ruby_xcode/ruby/build/../vm.c:4389
| /Users/fabio/ruby_xcode/ruby/build/ruby(Init_vm_objects+0x1b) [0x10511aa6b] /Users/fabio/ruby_xcode/ruby/build/../vm.c:4446
| /Users/fabio/ruby_xcode/ruby/build/ruby(ruby_setup+0x46) [0x104e4f0e6] /Users/fabio/ruby_xcode/ruby/build/../eval.c:82
| /Users/fabio/ruby_xcode/ruby/build/ruby(ruby_init+0xd) [0x104e4f3fd] /Users/fabio/ruby_xcode/ruby/build/../eval.c:98
| /Users/fabio/ruby_xcode/ruby/build/ruby(rb_main+0x2b) [0x104d2e6bb] /Users/fabio/ruby_xcode/ruby/build/../main.c:39
| /Users/fabio/ruby_xcode/ruby/build/ruby(main+0x62) [0x104d2e662] /Users/fabio/ruby_xcode/ruby/build/../main.c:65
|
| -- Other runtime information -----------------------------------------------
|
| * Process memory map:
|
| 104d2d000-105308000 r-x /Users/fabio/ruby_xcode/ruby/build/ruby
| 105308000-105315000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby
| 105315000-105317000 rw- /Users/fabio/ruby_xcode/ruby/build/ruby
| 105317000-10532c000 rw- /Users/fabio/ruby_xcode/ruby/build/ruby
| 10532c000-105500000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby
| 105500000-105502000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105502000-105507000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105507000-105508000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105508000-10550c000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 10550c000-10550d000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 10550d000-105516000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105516000-105517000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105517000-105518000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105518000-105521000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105521000-105522000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105522000-105523000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105523000-105524000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105524000-10552b000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105530000-105540000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 105573000-1055d3000 r-x /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 1055d3000-1055d7000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 1055d7000-1055db000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 1055db000-1055e7000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib
| 1055e7000-105c3e000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby.dSYM/Contents/Resources/DWARF/ruby
| 105c3e000-106295000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby.dSYM/Contents/Resources/DWARF/ruby
| 600000000000-600020000000 rw-
| 7f9643f00000-7f9644000000 rw-
| 7f9644000000-7f9644800000 rw-
| 7f9644800000-7f9644900000 rw-
| 7f9644900000-7f9644901000 rw-
| 7f9644a00000-7f9644b00000 rw-
| 7ff7b71d3000-7ff7ba9d3000 ---
| 7ff7ba9d3000-7ff7bb1d3000 rw-
| 7ff800000000-7ff840000000 r--
| 7ff840000000-7ff844b02000 r--
| 7ff844b02000-7ff844b4a000 r--
| 7ff844b4a000-7ff844c00000 rw-
| 7ff844c00000-7ff844e00000 rw-
| 7ff844e00000-7ff845000000 rw-
| 7ff845000000-7ff845200000 rw-
| 7ff845200000-7ff845400000 rw-
| 7ff845400000-7ff845600000 rw-
| 7ff845600000-7ff880000000 r--
| 7ff880000000-7ffd40000000 r--
| 7ffd40000000-7ffd44400000 r--
| 7ffd44400000-7ffd44600000 rw-
| 7ffd44600000-7ffd44800000 rw-
| 7ffd44800000-7ffd80000000 r--
| 7ffd80000000-7ffffe000000 r--
| 7fffffe00000-7fffffe01000 r--
| 7ffffffad000-7ffffffae000 r-x
| [IMPORTANT]
| Don't forget to include the Crash Report log file under
| DiagnosticReports directory in bug reports.
|
.

1. [2/3] Assertion for "stderr"
   | <[]> expected but was
   | <["../gc/default/default.c:1714: Assertion Failed: heap_add_poolpage:page->freelist != NULL",
   |  "ruby 3.5.0dev (2025-01-29T15:16:47Z master d3bb42776c) [x86_64-darwin24]",
   |  "",
   |  "-- Crash Report log information --------------------------------------------",
   |  "   See Crash Report log file in one of the following locations:",
   |  "     * ~/Library/Logs/DiagnosticReports",
   |  "     * /Library/Logs/DiagnosticReports",
   |  "   for more details.",
   |  "Don't forget to include the above Crash Report log file in bug reports.",
   |  "",
   |  "-- Control frame information -----------------------------------------------",
   |  "c:0001 p:---- s:0003 e:000002 DUMMY  [FINISH]",
   |  "",
   |  "",
   |  "-- Threading information ---------------------------------------------------",
   |  "Total ractor count: 0",
   |  "Ruby thread count for this ractor: 0",
   |  "",
   |  "-- C level backtrace information -------------------------------------------",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_print_backtrace+0x1d) [0x10515014d] /Users/fabio/ruby_xcode/ruby/build/../vm_dump.c:823",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_print_backtrace) (null):0",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_vm_bugreport+0x2c1) [0x105150431] /Users/fabio/ruby_xcode/ruby/build/../vm_dump.c:1155",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_assert_failure_detail+0x156) [0x104e41056] /Users/fabio/ruby_xcode/ruby/build/../error.c:1215",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_assert_failure_detail+0x0) [0x104e40f00] /Users/fabio/ruby_xcode/ruby/build/../error.c:1191",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_assert_failure) (null):0",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(heap_add_poolpage+0xa9) [0x104e84ea9] ../gc/default/default.c:1714",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(gc_sweep_step+0x204) [0x104e80224] ../gc/default/default.c:3941",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(gc_sweep_rest+0x53) [0x104e7fff3] ../gc/default/default.c:3979",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(gc_sweep+0x98) [0x104e7c418] ../gc/default/default.c:4151",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(gc_start+0x5f9) [0x104e86159] ../gc/default/default.c:6472",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(garbage_collect+0x2c) [0x104e87bbc] ../gc/default/default.c:6351",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(garbage_collect_with_gvl+0xb4) [0x104e8dbc4] ../gc/default/default.c:6753",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(objspace_malloc_gc_stress+0x8f) [0x104e8daff] ../gc/default/default.c:7996",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_gc_impl_malloc+0x49) [0x104e8d8f9] ../gc/default/default.c:8207",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(ruby_xmalloc2_body+0x32) [0x104e76a82] /Users/fabio/ruby_xcode/ruby/build/../gc.c:4699",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(ruby_xmalloc2+0x1d) [0x104e76a3d] /Users/fabio/ruby_xcode/ruby/build/../gc.c:4693",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(pin_array_list_new+0x6f) [0x10511ab3f] /Users/fabio/ruby_xcode/ruby/build/../vm.c:4389",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(Init_vm_objects+0x1b) [0x10511aa6b] /Users/fabio/ruby_xcode/ruby/build/../vm.c:4446",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(ruby_setup+0x46) [0x104e4f0e6] /Users/fabio/ruby_xcode/ruby/build/../eval.c:82",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(ruby_init+0xd) [0x104e4f3fd] /Users/fabio/ruby_xcode/ruby/build/../eval.c:98",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(rb_main+0x2b) [0x104d2e6bb] /Users/fabio/ruby_xcode/ruby/build/../main.c:39",
   |  "/Users/fabio/ruby_xcode/ruby/build/ruby(main+0x62) [0x104d2e662] /Users/fabio/ruby_xcode/ruby/build/../main.c:65",
   |  "",
   |  "-- Other runtime information -----------------------------------------------",
   |  "",
   |  "* Process memory map:",
   |  "",
   |  "104d2d000-105308000 r-x /Users/fabio/ruby_xcode/ruby/build/ruby",
   |  "105308000-105315000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby",
   |  "105315000-105317000 rw- /Users/fabio/ruby_xcode/ruby/build/ruby",
   |  "105317000-10532c000 rw- /Users/fabio/ruby_xcode/ruby/build/ruby",
   |  "10532c000-105500000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby",
   |  "105500000-105502000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105502000-105507000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105507000-105508000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105508000-10550c000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "10550c000-10550d000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "10550d000-105516000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105516000-105517000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105517000-105518000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105518000-105521000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105521000-105522000 --- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105522000-105523000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105523000-105524000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105524000-10552b000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105530000-105540000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "105573000-1055d3000 r-x /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "1055d3000-1055d7000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "1055d7000-1055db000 rw- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "1055db000-1055e7000 r-- /usr/local/Cellar/gmp/6.3.0/lib/libgmp.10.dylib",
   |  "1055e7000-105c3e000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby.dSYM/Contents/Resources/DWARF/ruby",
   |  "105c3e000-106295000 r-- /Users/fabio/ruby_xcode/ruby/build/ruby.dSYM/Contents/Resources/DWARF/ruby",
   |  "600000000000-600020000000 rw-",
   |  "7f9643f00000-7f9644000000 rw-",
   |  "7f9644000000-7f9644800000 rw-",
   |  "7f9644800000-7f9644900000 rw-",
   |  "7f9644900000-7f9644901000 rw-",
   |  "7f9644a00000-7f9644b00000 rw-",
   |  "7ff7b71d3000-7ff7ba9d3000 ---",
   |  "7ff7ba9d3000-7ff7bb1d3000 rw-",
   |  "7ff800000000-7ff840000000 r--",
   |  "7ff840000000-7ff844b02000 r--",
   |  "7ff844b02000-7ff844b4a000 r--",
   |  "7ff844b4a000-7ff844c00000 rw-",
   |  "7ff844c00000-7ff844e00000 rw-",
   |  "7ff844e00000-7ff845000000 rw-",
   |  "7ff845000000-7ff845200000 rw-",
   |  "7ff845200000-7ff845400000 rw-",
   |  "7ff845400000-7ff845600000 rw-",
   |  "7ff845600000-7ff880000000 r--",
   |  "7ff880000000-7ffd40000000 r--",
   |  "7ffd40000000-7ffd44400000 r--",
   |  "7ffd44400000-7ffd44600000 rw-",
   |  "7ffd44600000-7ffd44800000 rw-",
   |  "7ffd44800000-7ffd80000000 r--",
   |  "7ffd80000000-7ffffe000000 r--",
   |  "7fffffe00000-7fffffe01000 r--",
   |  "7ffffffad000-7ffffffae000 r-x",
   |  "[IMPORTANT]",
   |  "Don't forget to include the Crash Report log file under",
   |  "DiagnosticReports directory in bug reports.",
   |  ""]>.

2. [3/3] Assertion for "success?"
   | Expected #<Process::Status: pid 16632 SIGABRT (signal 6)> to be success?.

Finished tests in 3.208725s, 0.3117 tests/s, 1.8699 assertions/s.
1 tests, 6 assertions, 1 failures, 0 errors, 0 skips

ruby -v: ruby 3.5.0dev (2025-01-29T15:16:47Z master d3bb42776c) +PRISM [x86_64-darwin24]
make: *** [uncommon.mk:965: yes-test-all] Error 1

[peterzhu2118 (Peter Zhu)]

Thank you for this bug report. I have a fix here: https://github.com/ruby/ruby/pull/12667

[peterzhu2118 (Peter Zhu)]

• Status changed from Open to Closed

Applied in changeset git|a084fef9afc7713aa4f4111f7e826c7ca1a607c7.

---

[Bug #21099] Fix GC when Ractor list not initialized

When the Ractor list is not initialized and a GC is ran at boot, then it
would crash because the newobj_cache of the main Ractor is not cleared.
This commit changes it to use ruby_single_main_ractor when it's available
and iterate over the Ractor list when we have multiple Ractors.

[sanjioh (Fabio Sangiovanni)]

peterzhu2118 (Peter Zhu) wrote in #note-1:

Thank you for this bug report. I have a fix here: https://github.com/ruby/ruby/pull/12667

Thanks for the fix!