Bug #19761: AddressSanitizer fails with Thread and Process

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

[nobu (Nobuyoshi Nakada)]

With AddressSanitizer on macOS, this code crashes.

system('')
Thread.new {}
300_000.times do
  String.new(capacity: 1000)
end

==62870==ERROR: AddressSanitizer failed to deallocate 0x8000 (32768) bytes at address 0x62d00000a400
AddressSanitizer: CHECK failed: sanitizer_posix.cpp:61 "(("unable to unmap" && 0)) != (0)" (0x0, 0x0) (tid=857549)
    <empty stack>

Assertion Failed: ../debug/vm_core.h:1853:rb_current_execution_context:!expect_ec || ec != NULL
ruby 3.3.0dev (2023-07-08T02:54:37Z tmp 0083edc3a0) [x86_64-darwin22]

-- 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.     

-- C level backtrace information -------------------------------------------

[ecnelises (Chaofan QIU)]

For 70ce3c8947c7f95897e56b397270c061dd50f280, I did a fresh build with -fsanitize=address CFLAGS, not reproduced. (using M1 macOS 14.0 beta and Xcode 15 beta toolchain) Maybe x86_64 specific issue?