[all-commits] [llvm/llvm-project] c75aac: [DWARF] Don't assume optional always has a value.

[Jonas Devlieghere via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c75aac42a635bf710e818487592ea3bc5d7ef9b1
      https://github.com/llvm/llvm-project/commit/c75aac42a635bf710e818487592ea3bc5d7ef9b1
  Author: Jonas Devlieghere <jonas at devlieghere.com>
  Date:   2020-01-03 (Fri, 03 Jan 2020)

  Changed paths:
    M llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp

  Log Message:
  -----------
  [DWARF] Don't assume optional always has a value.

When getting the file name form the line table prologue we assume that a
valid string form value can always be extracted as a string. If you look
at the implementation of DWARFormValue this is not necessarily true. I
hit this assertion from LLDB when I create a "dummy" DWARFContext that
was missing the string section.