diff --git a/src/spawn_sync.cc b/src/spawn_sync.cc index 004e0ca3995b29..9be58f42fd4f23 100644 --- a/src/spawn_sync.cc +++ b/src/spawn_sync.cc @@ -1055,7 +1055,10 @@ Maybe SyncProcessRunner::ParseStdioOption(int child_fd, return Just(AddStdioInheritFD(child_fd, inherit_fd)); } - UNREACHABLE("invalid child stdio type"); + Utf8Value stdio_type(env()->isolate(), js_type); + fprintf(stderr, "invalid child stdio type: %s\n", stdio_type.out()); + + UNREACHABLE(); } int SyncProcessRunner::AddStdioIgnore(uint32_t child_fd) {