Uncaught TypeError: invalid options argument

[Enter steps to reproduce:]

1. ...
2. ...

**Atom**: 1.58.0 x64
**Electron**: 9.4.4
**OS**: Ubuntu 20.04.3
**Thrown From**: 'ide-python' package vundefined

### Stack Trace

Uncaught TypeError: invalid options argument

```
At /home/morteza/.atom/packages/ide-python/node_modules/mkdirp/lib/opts-arg.js:13

TypeError: invalid options argument
at optsArg (/packages/ide-python/node_modules/mkdirp/lib/opts-arg.js:13:11)
at mkdirp (/packages/ide-python/node_modules/mkdirp/index.js:11:10)
at Object.save (/packages/save-session/lib/files.coffee:34:5)
at /packages/save-session/lib/files.coffee:67:24
```

### Commands

```
-1:45.1.0 snippets:next-tab-stop (input.hidden-input)
-1:45.1.0 snippets:expand (input.hidden-input)
-1:45.1.0 editor:indent (input.hidden-input)
-1:43.7.0 core:backspace (input.hidden-input)
```

### Non-Core Packages

```
advanced-open-file 0.16.8
atom-beautify 0.33.4
atom-ide-base 3.4.0
atom-ide-code-format 1.0.2
atom-ide-datatip 0.25.0
atom-ide-debugger-python 0.7.3
atom-ide-definitions 0.4.2
atom-ide-hyperclick 1.0.11
atom-ide-markdown-service 2.1.0
atom-ide-outline 3.2.0
atom-ide-signature-help 0.16.0
auto-update-plus 0.11.4
busy-signal 2.0.1
expose 0.15.0
file-icons 2.1.47
highlight-selected 0.17.0
Hydrogen 2.16.3
intentions 2.1.1
linter 3.4.0
linter-ui-default 3.4.1
minimap 4.40.0
minimap-highlight-selected 4.6.6
platformio-ide-terminal 2.10.1
python-debugger 0.2.0
python-indent 1.2.6
save-session 0.15.7
TabNine 4.0.7
```

Start by examining the stack-trace locations in node_modules/mkdirp/lib/opts-arg.js, node_modules/mkdirp/index.js, and save-session/lib/files.coffee. The issue provides no usable reproduction steps, so first determine what save-session was doing when the invalid options argument occurred. Done means the cause is reproducible and the resulting behavior is verified without the uncaught TypeError.

Written by the indexing model from the issue text.