Re: -readnow crash Rust regression [Re: [RFA v2 3/4] Convert Rust to use discriminated unions]

[Tom Tromey <tom at tromey dot com>]

>>>>> "Tom" == Tom Tromey <tom@tromey.com> writes:

Tom> I have a hack to fix that but it reveals another problem, which is that
Tom> some of the type rewriting can be done multiple times, causing other bugs.
Tom> I hadn't considered this possibility.  I'm looking into a good way to
Tom> fix it.

This analysis was mistaken, and it turned out to be simpler -- good
news.

I will send out my patches, but writing a test case for 23010 seems
quite painful.  Based on the stack trace I got, and investigating the
DWARF of the reproducer, you need:

* A partial CU with no language, which has a function that has some parameters
* A full C++ CU that references that function using DW_AT_abstract_origin

In the webkit reproducer this DW_AT_abstract_origin occurs in an inlined
function IIRC.

Tom