Re: [Qemu-devel] [PATCH v4 05/10] json-lexer: make it safe to call destroy multiple times

[Markus Armbruster <armbru@redhat.com>]

Marc-André Lureau <marcandre.lureau@redhat.com> writes:

> We can easily avoid the burden of checking if the lexer was
> initialized prior to calling destroy by the caller, let's do it.
>
> This allows simplification in state tracking in the qmp-async RFC
> series, the patch "qmp: add QmpSession" can call qmp_session_destroy()
> multiple time, which in turns calls json_lexer_destroy().
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  qobject/json-lexer.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/qobject/json-lexer.c b/qobject/json-lexer.c
> index e1745a3d95..39969047f4 100644
> --- a/qobject/json-lexer.c
> +++ b/qobject/json-lexer.c
> @@ -351,5 +351,8 @@ void json_lexer_flush(JSONLexer *lexer)
>  
>  void json_lexer_destroy(JSONLexer *lexer)
>  {
> -    g_string_free(lexer->token, true);
> +    if (lexer->token) {
> +        g_string_free(lexer->token, true);
> +        lexer->token = NULL;
> +    }
>  }

Please stick this patch into the series its commit message refers to.