<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/75299>75299</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Error when using Instruction.getDebugLoc().getLine()
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          S-Hang23
      </td>
    </tr>
</table>

<pre>
    I met an error when I am writing a llvm pass to analyze the live variables in a program. I want to push the liveness information accoding to the line number in the source code. 
```
if (Instruction *I = dyn_cast<Instruction>(&*inst)) {
 if(sourceLineNum != I->getDebugLoc().getLine()){
            sourceLineNum = I->getDebugLoc().getLine();
            BlockInfo.pushBitVector(BV);
 }
```
I use clang -g to include debug info in my .ll file.
However I met such error:
```log
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: opt-14 -load ./build/libLiveVariableInBranchPass.so -live-var-in-branch test2.ll -enable-new-pm=0
1.      Running pass 'Function Pass Manager' on module 'test2.ll'.
2.      Running pass 'LiveVariableInBranch Pass' on function '@foo'
 #0 0x00007f2ec50e9d01 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xe3fd01)
 #1 0x00007f2ec50e7a3e llvm::sys::RunSignalHandlers() (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xe3da3e)
 #2 0x00007f2ec50ea236 (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xe40236)
 #3 0x00007f2ec3d91520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f2ec51ad0c3 llvm::DebugLoc::getLine() const (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xf030c3)
 #5 0x00007f2ec1c4a8de (anonymous namespace)::LiveVariableInBranch::getLivenessInSingleBB(llvm::BasicBlock&, std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >) LiveVariableInBranchSkeleton.cpp:0:0
 #6 0x00007f2ec1c4a4a6 (anonymous namespace)::LiveVariableInBranch::runOnFunction(llvm::Function&) LiveVariableInBranchSkeleton.cpp:0:0
 #7 0x00007f2ec5224390 llvm::FPPassManager::runOnFunction(llvm::Function&) (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xf7a390)
 #8 0x00007f2ec522b983 llvm::FPPassManager::runOnModule(llvm::Module&) (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xf81983)
 #9 0x00007f2ec5224f36 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/lib/x86_64-linux-gnu/libLLVM-14.so.1+0xf7af36)
#10 0x000000000043468b main (/usr/lib/llvm-14/bin/opt+0x43468b)
#11 0x00007f2ec3d78d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#12 0x00007f2ec3d78e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#13 0x000000000041a785 _start (/usr/lib/llvm-14/bin/opt+0x41a785)
Segmentation fault (core dumped)
```
I can't get why this occurs. When I deleted the code about push liveness info when line number changes, the pass worked normally.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzEV19v6j4S_TTmZUTk2OFPHngobdFF6t2tfl3dfUQTxwRvHRvZTin76Vd2KCWou9uLVvtDVCW25_hkfGY8g96rxki5IJMlmTyMsAs76xYv4x9oGsZHla2PizW0MgAakM5ZB4edNLAGbOHgVFCmAQSt31rYo_cQLKBBffynhLCToNWbhDd0CistPSgDCHtnG4dtBms4oAnRZN_53Xm9kT6u3FrXYlDWAAph67hRsKdFRoLp2kq6iBiHvO2ckCBsLTMg9IHQOzKlp296VFsgbL42PrhOJFjC7tZA-APUR7MR6APh9xfzhD8SNidsStidMj4QVhJWApkte0BQW8Lm_cZPysi_dC0QlkfA9Zjwx0aGB1l1zZMVCafMGhniwv4pfs9QF58rwO-i8S-gltqK17XZ2iz6d6nCLymCdYTNl78GNmT28KXP1tB5CUKjaWCc3K-M0F0toY5c0iHFE2iPkGkNW6Vl1lv-sAf5Jh302vGd2PXqIfzuaidtm37k-enx7uURfFe1KgBC3MDJvXVJIbsQ9j5asxVhq0aFXVdlwraEraL4Tv_Ge2f_IUUgbKW876QnbAVo6jPvqBXh0O-gQvEaHIoPxi8BxSvUXbs_c6RZ78fnXrCArulaaULkAXYfxnkBY22xhoywVdUpXUceqnpSb_LXSfRrs3RoxO4Zvc-8hXGU-PgN3ViZcZWmIEgfWPTgWJpoMzbyMN63hD-cDiI_MfmjMyYGQgo1wmarzvRajujwEw020hE2A2ugtXWnZVz1AU_Y7PSy7N_gfUU8YZ8wtx_7ETYjBd1aG3-cRMQ4BfpOKaWzLZNiQmVZ0zzlhuhSfuePvv_x7JQJyeF_iydA2PxzkcPDxvrgJLYp9u5BmZACLwo9epew1ft8upkWY61M9z5uTHdy-9Ovn-O8yLzNcsKW9F3ybU3zKPUzxfyK4gy5_IriH515UY1B_QNNraXzfZzdxqJGLgcs2BULZHx6E3RBGZ8OoPklNK_LfMLoN6BFBJ0m0IJNGB1gFgO6OdZU8AunnRNTehrkJRDW-HDLq20pp4IPaEwuaeSiwHkd9T1HY82xtZ0Hg630-ySpsmfzlaIvePa3zdq8KNNouVwOpLhEr0RKoicl-lD3My3uCb8_P2424v09z_uHKlptfHDKNITfix26gW0c2ASHKuaRfjreNBcrUGsrMGbq8zyc1qRYuFiqpff_fybwn9adB_eo3J_ALSnuw1eXfEv4Sgwvr1LLYE0m9jHz0_R3ltz0WnIFTm-XnOvMX81Hzh5I7XNwehvR2SBEGSt4SS9CdPUcs_jHBfF7ZG4J3hnycphD5lcEq3LOv0HwZ7rFBvQ-hm4mN8_L-TCzlNfe2_LpBTktGxTH0931SXPd7vWZ6v-W4gy3F3k93lsfd2v_KXgxnVfQojIn_M678y6pFMqLWJQoQ9jK7kOf2ZPVADYfXhezeV3-5nXByvriqCMmu8aUBYXNJpptfEAXNhe8v72LLIa78KFDcpzNJ9Dj_45Lkt0Z-EU2scLr-44tdjphCetkKg1l_UnhulQWaGKtBY0McNgdIeyUBytE53wGf--bpjqGsKz7MtTWErCyXejbn0Hr03dZl42O2KFpYkF7n6xTxXaw7lXWYGKnpPUxG9ULXpe8xJFc5DPKislkVvLRbrHNq6Jgop5OtrQU1bTIy5IhSi5znheTyUgtGI0nl3M6j77N6LTgAvOS5RM6mXBKCipbVDqLjsysa0apwF7MJqwsRxorqX3qIhkz8gBpkjAWm0q3SM6vusaTgmrlg_9ECSpouXj87Cw7HwvSiz4s-y-tz6hzenF7e5Be4F8BAAD__09Zhlg">