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From: Olivia Nelson <the.warl0ck.1989@gmail.com>
Date: Tue, 8 Dec 2020 09:52:21 +0800
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Subject: Can't print in gdb
To: gdb@sourceware.org
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I'm trying to print with a prefix, how can I do that? I've tried to
use + or printf, none of them works:

(gdb) ptype substr
type = struct string {
    uint8 *str;
    int len;
}
(gdb) p substr
$1 = 0x111111 "xxx=0"
(gdb) printf "%s\n", substr
Value can't be converted to integer.
(gdb) p "a" + substr
A syntax error in expression, near `'.