MyPaint @2.0.1_1: Crashes on startup; after rebuilding from source, RuntimeError: Unknown install type; could not determine paths

[RobK88]

The binary in the MyPaint package downloaded from Macports crashes on my Mac running El Capitan with a Segmentation Fault 11.

grinch$ myPaint
INFO: mypaint: Installation layout: conventional POSIX-like structure with prefix '/opt/local/Library/Frameworks/Python.framework/Versions/3.8'
WARNING: gui.userconfig: Failed to load settings file: /Users/grinch/.config/mypaint/settings.json
WARNING: gui.userconfig: Failed to load settings: using defaults
INFO: gui.main: No locale setting found, using system locale
Segmentation fault: 11

So I uninstalled MyPaint and built it from source:

sudo port -vs install mypaint

etc 
etc

--->  Cleaning MyPaint
--->  Removing work directory for MyPaint
--->  Updating database of binaries
--->  Scanning binaries for linking errors
--->  No broken files found.                             
--->  No broken ports found.

It built just fine. But now I get a different runtime error:

grinch$ myPaint
CRITICAL: mypaint: Installation layout: unknown!
Traceback (most recent call last):
  File "/opt/local/bin/myPaint", line 293, in <module>
    = get_paths()
  File "/opt/local/bin/myPaint", line 210, in get_paths
    raise RuntimeError("Unknown install type; could not determine paths")
RuntimeError: Unknown install type; could not determine paths

[ryandesign (Ryan Carsten Schmidt)]

Replying to RobK88:

The binary in the MyPaint package downloaded from Macports crashes on my Mac running El Capitan with a Segmentation Fault 11.

grinch$ myPaint
INFO: mypaint: Installation layout: conventional POSIX-like structure with prefix '/opt/local/Library/Frameworks/Python.framework/Versions/3.8'
WARNING: gui.userconfig: Failed to load settings file: /Users/grinch/.config/mypaint/settings.json
WARNING: gui.userconfig: Failed to load settings: using defaults
INFO: gui.main: No locale setting found, using system locale
Segmentation fault: 11

I'm not sure why it crashed but macOS should have generated a crash log in ~/Library/Logs/DiagnosticReports; if you attach it, maybe it gives a clue about what the problem was.

So I uninstalled MyPaint and built it from source:

sudo port -vs install mypaint

etc 
etc

--->  Cleaning MyPaint
--->  Removing work directory for MyPaint
--->  Updating database of binaries
--->  Scanning binaries for linking errors
--->  No broken files found.                             
--->  No broken ports found.

It built just fine. But now I get a different runtime error:

grinch$ myPaint
CRITICAL: mypaint: Installation layout: unknown!
Traceback (most recent call last):
  File "/opt/local/bin/myPaint", line 293, in <module>
    = get_paths()
  File "/opt/local/bin/myPaint", line 210, in get_paths
    raise RuntimeError("Unknown install type; could not determine paths")
RuntimeError: Unknown install type; could not determine paths

The binary of MyPaint that we produced for macOS 12 Monterey works fine on my system. I'm surprised to see from the port's file list for macOS 14 Sonoma at ​https://ports.macports.org/port/MyPaint/details/ that it installs 891 files while on earlier systems it installs 752 files. This shouldn't differ by OS version so something must have changed in MacPorts that causes it to generate a different set of files now (where "now" is January 19, 2024 when we made the Sonoma binary for arm64) than it did when we generated the macOS 13 Ventura arm64 binary (which was March 6, 2023). Indeed, after I rebuilt from source on Monterey, the port now installs 891 files and now I can reproduce your "Unknown install type" error.

So yes, something has broken MyPaint. One change that occurred between those dates that has broken many other Python ports is that python.pep517 is now yes ([3173d46b9a29bc9d79ddb6970e7f083ebe3f79c0/macports-ports]) whereas before it was no. Setting it back to no and rebuilding fixes the problem for me, so I'll commit that shortly.

[ryandesign (Ryan Carsten Schmidt)]

In 30b1e1ededbbc9be5937fdecb4b6c1cd4bef2494/macports-ports (master):

MyPaint: Don't use pep517

Fixes failure to launch.

Closess: #70689

[RobK88]

@ryandesign -- I installed myPaint @2.0.1_2. MacPorts built it from source. But it still crashes on El Capitan... I will attach the crash report.

grinch$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.11.6
BuildVersion:	15G22010

grinch$ port installed mypaint
The following ports are currently installed:
  MyPaint @2.0.1_1
  MyPaint @2.0.1_2 (active) 
 
grinch$ MyPaint
INFO: mypaint: Installation layout: conventional POSIX-like structure with prefix '/opt/local/Library/Frameworks/Python.framework/Versions/3.8'
WARNING: gui.userconfig: Failed to load settings file: /Users/grinch/.config/mypaint/settings.json
WARNING: gui.userconfig: Failed to load settings: using defaults
INFO: gui.main: No locale setting found, using system locale
Segmentation fault: 11

[RobK88]

It looks like MyPaint is not creating the config file.

grinch$ cat /Users/grinch/.config/mypaint/settings.json
cat: /Users/grinch/.config/mypaint/settings.json: No such file or directory

grinch$ cd /Users/grinch/.config/mypaint/
-bash: cd: /Users/grinch/.config/mypaint/: No such file or directory

[ryandesign (Ryan Carsten Schmidt)]

Ok, it's crashing in PyObjC_ffi_closure_alloc (presumably before it has had a chance to make config files). I don't know what to do about that crash. You could report it to the developers of MyPaint and see if they have any suggestions.