Trojan is any malware that pretends to be a legit program. It does not need to have backdoor or info stealing capability even though most malware (trojan or not) today does. For example, pre-Internet trojans might just invisibly install themselves along the actual program they were bundled with and then nuke the system on a certain date. Antivirus companies would even advance the date on their systems in hopes of detecting these and being the first to develop a patch.
But since this program is not malicious, it just straight up hogs system resources and/or crashes it due to a mistake, it cannot be considered malware and therefore not a trojan.
Certain Intel processors from around 2000 would crash everything when loading the 4 bytes F0 0F C7 C8 into a specific register. Would you consider this a backdoor because it allows any program to crash the system? I wouldn’t say so, crashing Windows 98 was probably not too hard anyway…
The anon got it wrong. These are “>” or “greater than” symbols, not arrows, although they look like arrowheads. They are used to signal a quote, which makes the text green on 4chan or inside a quote block on other platforms. In 4chan culture, the resulting greentext is not a quote, it has a meaning of its own.
The actual implication arrow, used in mathematical logic for statements like “if A, then B” or “A implies B”, is “⇒” or “rightwards double arrow” in Unicode. Using ASCII characters, it can be written as “=>”.