[all-commits] [llvm/llvm-project] d94526: [ELF] --warn-backrefs: check that D79300 fixed an ...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d94526bb5fa5a22645240aa5bee5a3163fa193a9
      https://github.com/llvm/llvm-project/commit/d94526bb5fa5a22645240aa5bee5a3163fa193a9
  Author: Fangrui Song <maskray at google.com>
  Date:   2020-06-26 (Fri, 26 Jun 2020)

  Changed paths:
    M lld/ELF/InputFiles.cpp
    M lld/test/ELF/warn-backrefs.s

  Log Message:
  -----------
  [ELF] --warn-backrefs: check that D79300 fixed an issue due to `mb = {}`

D79300 forgot to change `getBuffer().empty()` in LazyObjFile::parse to
`fetched`. This caused incorrect iterating after the current LazyObjFile was
fetched. This issue is benign and can just cause loss of "undefined symbols"
and "backward reference" diagnostics.

Before D79300 `mb = {}` caused --warn-backrefs-exclude to be useless for
a fetched LazyObjFile.

Add two test cases.