I report this bug because of corelibs-dev email from "Andrey Turbanov"

ProcessHandleImpl.Info.toString code:

StringBuilder sb = new StringBuilder(60);
sb.append('[');
if (user != null) {
    sb.append("user: ");
    sb.append(user());
}
if (command != null) {
    if (sb.length() != 0) sb.append(", ");
    sb.append("cmd: ");
    sb.append(command);
}

Opening bracket '[' is added unconditionally to the StringBuilder. But later the code checks "if (sb.length() != 0)". This condition will always be true.

See also:

https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-September/081774.html