Re: [PATCH] left shift of negative value do_binop src/arith_yacc.c:111:12

Steffen Nurpmeso wrote in
 <20250820112753.FJo-4m6j@steffen%sdaoden.eu>:
 |Harald van Dijk wrote in
 | <[email protected]>:
 ||On 20/08/2025 01:33, Aleksander Ushakov wrote:
 ||> Well, if we take bash with UBSAN instrumentation and try to use a 
 ...
 ||I did that in my own version back in 2019, with the exception of subtly 
 ...
 ||<https://github.com/hvdijk/gwsh/commit/c4d6f1b1613c228db1e157a2136c53f55\
 ||b4530c8>. 
 ||As those commits show, there are quite a few more cases to consider than 
 ||left shifts of negative values.
 |
 |We (i am only a MUA though, since busybox did not take the code,
 |and kept their broken implemenation; will try again at some time)
 |all return -2 for "-1 << 1", at least on this hardware etc etc.
 |You then return 0 from looking at the commitdiff!?!

ah no forget that rubbish, the test is about rval.

  ...

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)