Bug 22660 – std.experimental.allocator randomly fails unittest

The following Phobos unittest fails randomly on macOS 12.x x64, DMD (latest) test: -------------------------- ****** FAIL debug64 std.experimental.allocator core.exception.AssertError@std/experimental/allocator/package.d(3738): Assertion failure ---------------- std/regex/internal/tests.d:364 onAssertError [0x106595e21] std/regex/internal/tests.d:364 _d_assertp [0x106596152] std/digest/sha.d:506 pure nothrow @safe void std.experimental.allocator.__unittest_L3717_C1().__lambda10() [0x105ca03b8] std/digest/sha.d:334 void std.experimental.allocator.__unittest_L3717_C1() [0x105ca01c3] std/datetime/systime.d:11345 void std.experimental.allocator.__modtest() [0x105c9a6bf] ../druntime/src/test_runner.d:73 void test_runner.doTest(object.ModuleInfo*, ref core.runtime.UnitTestResult) [0x10485317f] ../druntime/src/test_runner.d:44 core.runtime.UnitTestResult test_runner.testModules() [0x10485308c] ../druntime/src/test_runner.d:25 core.runtime.UnitTestResult test_runner.tester() [0x104852ec3] std/regex/internal/tests.d:364 runModuleUnitTests [0x10659767c] std/regex/internal/tests.d:364 void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int function(char[][])*).runAll() [0x1065c1efd] std/regex/internal/tests.d:364 void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int function(char[][])*).tryExec(scope void delegate()) [0x1065c1e78] std/regex/internal/tests.d:364 _d_run_main2 [0x1065c1dda] std/regex/internal/tests.d:364 _d_run_main [0x1065c1b0e] ../druntime/src/test_runner.d:110 main [0x104852d69] ??:? start [0x116a834fd] make[1]: *** [unittest/std/experimental/allocator/package.run] Error 1

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