CRASH (f86115ad python) core/unix/module.c:101 assert

**Describe the bug**
Running DynamoRIO with python application that uses Tensorflow results in a crash. DynamoRIO can successfully run with a trivial helloworld python program, and even with a python application that uses PyTorch.

The goal is to use dynamorio with drcachesim to collect memory trace, but it crashes. This is similar to the issue #2929 and the suggestion there was to try debugging without any DynamoRIO client. So, providing details here from the debug run.

**To Reproduce**
Steps to reproduce the behavior:
1. Run the python 3.7 with tensorflow 1.15 installed in Anaconda environment.
2. Precise command line for running the application.
```
drrun -debug -- python -c "import tensorflow as tf"
```
3. Exact output or incorrect behavior.
[debug_drio_python_tensorflow.txt](https://github.com/DynamoRIO/dynamorio/files/6462860/debug_drio_python_tensorflow.txt)

Please also answer these questions:
- What happens when you run without any client?
Crashes
- What happens when you run with debug build ("-debug" flag to drrun/drconfig/drinject)?
Throws assert at core/unix/module.c:101

**Expected behavior**
Program should run to completion when run without any client.

**Versions**
- What version of DynamoRIO are you using?
f86115ad
- Does the latest build from https://github.com/DynamoRIO/dynamorio/releases solve the problem?
using the latest build
- What operating system version are you running on?
Ubuntu 18.04, Linux 5.4.0-72-generic
- Is your application 32-bit or 64-bit?
64-bit