[Bug]: Compiling with `--library-python` and `--lldb` fails when generating the header file

[lydia-duncan]

Summary of Problem

Description: I was trying to debug the python library compilation of another bug, but couldn't get to the piece of code I wanted to execute because of the following error during closeLibraryHelperFile:

error: moving beautified file

This same error does not occur when compiling the program without --lldb. It impacts any testing getting compiled into a Python library.

Is this issue currently blocking your progress? This prevents most debugging of Python interop

Steps to Reproduce

Source Code:

Any library python code, I was able to demonstrate it with test/interop/python/testing.chpl

Compile command: chpl --library --library-python --lldb foo.chpl

Execution command: N/A

Associated Future Test(s): I'm not sure how to make a future for lldb

Configuration Information

• Output of chpl --version: 2.2.0 pre-release
• Output of $CHPL_HOME/util/printchplenv --anonymize:

  CHPL_HOST_PLATFORM: darwin
  CHPL_HOST_COMPILER: clang
  CHPL_HOST_CC: clang
  CHPL_HOST_CXX: clang++
  CHPL_HOST_ARCH: x86_64
  CHPL_TARGET_PLATFORM: darwin
  CHPL_TARGET_COMPILER: clang
  CHPL_TARGET_CC: clang
  CHPL_TARGET_CXX: clang++
  CHPL_TARGET_LD: clang++
  CHPL_TARGET_ARCH: x86_64
  CHPL_TARGET_CPU: native
  CHPL_LOCALE_MODEL: flat
  CHPL_COMM: none
  CHPL_TASKS: qthreads
  CHPL_LAUNCHER: none
  CHPL_TIMERS: generic
  CHPL_UNWIND: none
  CHPL_HOST_MEM: cstdlib
  CHPL_MEM: jemalloc
  CHPL_TARGET_JEMALLOC: bundled
  CHPL_ATOMICS: cstdlib
  CHPL_GMP: none
  CHPL_HWLOC: bundled
  CHPL_RE2: bundled
  CHPL_LLVM: none *
  CHPL_LLVM_SUPPORT: bundled
  CHPL_LLVM_CONFIG: <elided>
  CHPL_LLVM_VERSION: 18
  CHPL_AUX_FILESYS: none
  CHPL_LIB_PIC: pic *
  CHPL_SANITIZE: none
  CHPL_SANITIZE_EXE: none

• Back-end compiler and version, e.g. gcc --version or clang --version: Apple clang version 15.0.0
• (For Cray systems only) Output of module list: N/A

[lydia-duncan]

Jade mentioned in chat that they've encountered similar issues when trying to debug any code in makeBinary or codegenPartTwo. From Jade:

I believe it has to do with how lldb follows forked children. I've never been able to work around it (other than using gdb), but maybe you can set lldbs forking mode?

I tried settings set target.process.follow-fork-mode child but that didn't seem to help