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08:17
@LdBeth It does work, can't remember if the installer lets you install the IME but not the interpreter, though.
a←1 2 3
a[a⊣a+←1]←0
INDEX ERROR
a[a⊣a+←1]←0

a
1 2 3

Shouldn't a be 2 3 4?
Maybe it should be documented that names referenced in assignment will be unaltered if the assignment fails
 
8 hours later…
16:27
@essielovett I have Dyalog 18.2 and it gives me 2 3 4
seems tryapl.org which runs a different version gives 1 2 3
@essielovett Ah, I tried the standalone IME installer but it seems has no effect
 
3 hours later…
20:00
@LdBeth TryAPL runs the same version, but rolls back the state upon error.

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