[llvm-bugs] [Bug 49977] New: clang crashes when compiling omp code with lambda on Windows

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49977

            Bug ID: 49977
           Summary: clang crashes when compiling omp code with lambda on
                    Windows
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Clang Compiler Support
          Assignee: unassignedclangbugs at nondot.org
          Reporter: adamf88 at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 24757
  --> https://bugs.llvm.org/attachment.cgi?id=24757&action=edit
program, build script and output crash report

clang compiler crashed when compiling this code (on Windows).
Tested on: LLVM 12.0.0-rc5 (binaries from github)

Compile command:
"C:\\Program Files\\LLVM\\bin\\clang-cl.exe" -cc1 -emit-obj -fcxx-exceptions
-fexceptions -fms-compatibility -fms-compatibility-version=19.16.27045 -fopenmp
-o a.obj test.cpp

Sample program:

void A(int);
void B(int cnt)
{
        __pragma(omp parallel for)
        for (int i = 0; i < cnt; ++i)
        {
                [=](){
                        __pragma(omp critical(info))
                        {
                                A(cnt);
                        }
                }();
        }
}

Effect:
No context value for inlined OpenMP region
UNREACHABLE executed at
C:\src\llvm_package_1200-rc5\llvm-project\clang\lib\CodeGen\CGOpenMPRuntime.cpp:246!
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: "C:\\\\Program Files\\\\LLVM\\\\bin\\\\clang-cl.exe"
-cc1 -emit-obj -fcxx-exceptions -fexceptions -fms-compatibility
-fms-compatibility-version=19.16.27045 -fopenmp -o a.obj test.cpp
1.      <eof> parser at end of file
2.      Per-file LLVM IR generation
3.      test.cpp:7:3: Generating code for declaration 'B(int)::(anonymous
class)::operator()'
4.      test.cpp:9:4: LLVM IR generation of compound statement ('{}')

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