[Bug gdb/34288] gdb accepts invalid DW_OP_bra / DW_OP_skip branch targets

https://sourceware.org/bugzilla/show_bug.cgi?id=34288

--- Comment #4 from Tom Tromey <tromey at sourceware dot org> ---
(In reply to Simon Marchi from comment #3)

> Detecting whether the expression jumps in the middle of an instruction, I
> think it would be more difficult and not as important.  If the expression is
> buggy, well, it will yield bogus results.

If you were really motivated you could write expressions where the bytes
have double meaning and branching to the middle would work fine, a la
Mel the Real Programmer.  I think for gimli I wrote some tests like this.

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