[llvm-bugs] [Bug 34278] New: ms-pdb: segfault if linking .obj compiled with precompiled header and /Z7

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34278

            Bug ID: 34278
           Summary: ms-pdb: segfault if linking .obj compiled with
                    precompiled header and /Z7
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: alex-telishev at ya.ru
                CC: llvm-bugs at lists.llvm.org

lld-link crashes if trying to link any .obj file compiled with /Z7 and /Yu
option. It crashes in TypeStreamMerger::remapIndex function in 
LastError = joinErrors(std::move(*LastError), errorCorruptRecord());
because LastError is nullopt. If you fix this segfault "The CodeView record is
corrupted." error is printed. The problem is probably because LF_PRECOMP record
is not handled at all.

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