[Dwarf-Discuss] dsymutil: "could not find referenced DIE" followed by a segmentation fault and other newbie questions

[Gil Moses]

Hi,

Building with Xcode 7, once in a while I get the following warnings from the dsymutil tool (a few dozens):
"could not find referenced DIE" 
Followed be a segmentation fault.

Adding the verbosity flag, I got detailed information about the DIEs that had the error, e.g.:
===========
while processing /p4client/ProAudio/dev_main/ProAudio/XcodeBuildProducts/Debug/libWaveShell-Common.a(GraphicStream_Utils.o):
warning: could not find referenced DIE
    in DIE:

0x0001415e:       DW_TAG_imported_declaration [99]  
                    DW_AT_decl_file [DW_FORM_data1]	("/Applications/Xcode7.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/sys/_types/_time_t.h")
                    DW_AT_decl_line [DW_FORM_data2]	(20047)
                    DW_AT_import [DW_FORM_ref4]	(cu + 0x4c4f5254 => {0x4c4f5254})
============

How do I go about understanding the error, what caused it and how to solve it?
BTW, the lib size being built is around 350MB. Could there be a size issue causing this seg fault?

While I'm here, where could I download the full source code of dsymutil? All I found was links to separate files (https://opensource.apple.com/source/clang/clang-700.0.72/src/tools/dsymutil/)

Thanks,
Gil Moses.