Issue #19761 has been updated by 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? ---------------------------------------- Bug #19761: AddressSanitizer fails with Thread and Process https://bugs.ruby-lang.org/issues/19761#change-104166 * Author: nobu (Nobuyoshi Nakada) * Status: Open * Priority: Normal * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- With AddressSanitizer on macOS, this code crashes. ```ruby 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 ------------------------------------------- ``` -- https://bugs.ruby-lang.org/