[llvm-bugs] [Bug 43048] New: ModuleSummaryIndex::print() crashes on a thinlto summary

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=43048

            Bug ID: 43048
           Summary: ModuleSummaryIndex::print() crashes on a thinlto
                    summary
           Product: libraries
           Version: trunk
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Linker
          Assignee: unassignedbugs at nondot.org
          Reporter: karthikeyan.m at gmail.com
                CC: llvm-bugs at lists.llvm.org

Repro: 

Run llvm-as -d on /llvm/test/Assembler/thinlto-summary.ll

Reproduced on master at commit ee6700f69766b57849f483f471387229e495e311

kmanivannan at kmanivannan-mbp:~/local/llvm-project-master/build$ bin/llvm-as  -d
../llvm/test/Assembler/thinlto-summary.ll

Here's the assembly:
; ModuleID = '../llvm/test/Assembler/thinlto-summary.ll'
source_filename = "../llvm/test/Assembler/thinlto-summary.ll"

^0 = module: (path: "thinlto-summary1.o", hash: (1369602428, 2747878711,
259090915, 2507395659, 1141468049))
^1 = module: (path: "thinlto-summary2.o", hash: (2998369023, 4283347029,
1195487472, 2757298015, 1852134156))
^2 = gv: (Stack dump:
0.      Program arguments: bin/llvm-as -d
../llvm/test/Assembler/thinlto-summary.ll
0  llvm-as                  0x0000000106b4afbc
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 60
1  llvm-as                  0x0000000106b4b579
PrintStackTraceSignalHandler(void*) + 25
2  llvm-as                  0x0000000106b49116 llvm::sys::RunSignalHandlers() +
118
3  llvm-as                  0x0000000106b4f572 SignalHandler(int) + 210
4  libsystem_platform.dylib 0x00007fff66542b5d _sigtramp + 29
5  libsystem_platform.dylib 000000000000000000 _sigtramp + 18446603338799371456
6  llvm-as                  0x0000000106955a89 llvm::Value::getName() const +
25
7  llvm-as                  0x000000010666300b llvm::ValueInfo::name() const +
59
8  llvm-as                  0x000000010666049a (anonymous
namespace)::AssemblyWriter::printSummaryInfo(unsigned int, llvm::ValueInfo
const&) + 90
9  llvm-as                  0x000000010663c550 (anonymous
namespace)::AssemblyWriter::printModuleSummaryIndex() + 1664
10 llvm-as                  0x000000010663be47
llvm::ModuleSummaryIndex::print(llvm::raw_ostream&, bool) const + 119
11 llvm-as                  0x00000001064feac1 main + 1121
12 libdyld.dylib            0x00007fff663573d5 start + 1
13 libdyld.dylib            0x0000000000000003 start + 18446603338801384495
Segmentation fault: 11

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