[Bug symtab/34149] [.debug_names] dwarf2_read_debug_names calls std::lower_bound on unsorted all_units vector

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=34149

--- Comment #10 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Simon Marchi from comment #9)
> - this file has the DWARF 5 type units in a .debug_types section, which is
> not correct (should be in .debug_info), but we still support it for some
> reason (we should perhaps fix the DWARF assembler)

Assuming we're talking about debug-names-bad-cu-index, I don't understand why
you call it a dwarf 5 type unit.

The version field seems to state that it's a v4 one:
...
Contents of the .debug_types section:

  Compilation Unit @ offset 0:
   Length:        0x42 (32-bit)
   Version:       4
...

> Can you test the patch below?

I've tested this, by running the 3 failing test-cases in a loop of 100, and the
regression no longer triggers.

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