Fix segfault in tests due to a bug in libc 0.2.154

build_system/build_sysroot/Cargo.toml

@@ -7,6 +7,7 @@ resolver = "2"
 [dependencies]
 core = { path = "./sysroot_src/library/core" }
 compiler_builtins = "0.1"
+libc = "=0.2.153"
 alloc = { path = "./sysroot_src/library/alloc" }
 std = { path = "./sysroot_src/library/std", features = ["panic_unwind", "backtrace"] }
 test = { path = "./sysroot_src/library/test" }