[Issue 18068] No file names and line numbers in stack trace

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18068

--- Comment #9 from Seb <greensunny12 at gmail.com> ---
FWIW my current guess is that its related to a "recent" change in glibc. 

This could also be related:

https://github.com/dlang/druntime/pull/2151

> The latter is how I stumbled on this. LLVM 6.0 led to DWARF v4 debuginfos, rt.backtrace.dwarf doesn't support that version, so no file/line infos => "??:? \0" + exception

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