Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x40 in tid 10919 (SDLThread), pid 10882 (org.test.myapp)

[walfredcutaran]

Versions

• Python: 3.10
• OS: Windows 11
• Buildozer: buildozer-1.4.0.dev0

Description

Last month there was no problem building my application, it works on my android device specifically api31 Android 12
every feature I implemented with kivy,kivyMD etc. works like charm, i just dont know why in the last 2 weeks im getting a ''Android Fatal signal 11 (SIGSEGV) '' error SDLTHREAD, but the twist is my app works on my friends phone android 10 device...

buildozer.spec

Command:

// REPLACE ME: !buildozer -v android debug

Spec file:

[app]

# (str) Title of your application
title = Ferbs

# (str) Package name
package.name = myapp

# (str) Package domain (needed for android/ios packaging)
package.domain = org.test

# (str) Source code where the main.py live
source.dir = .

# (list) Source files to include (let empty to include all the files)
source.include_exts = py,png,jpg,kv,atlas,ttf

# (list) List of inclusions using pattern matching
#source.include_patterns = assets/*,images/*.png

# (list) Source files to exclude (let empty to not exclude anything)
#source.exclude_exts = spec

# (list) List of directory to exclude (let empty to not exclude anything)
#source.exclude_dirs = tests, bin, venv

# (list) List of exclusions using pattern matching
# Do not prefix with './'
#source.exclude_patterns = license,images/*/*.jpg

# (str) Application versioning (method 1)
version = 0.5

# (str) Application versioning (method 2)
# version.regex = __version__ = ['"](.*)['"]
# version.filename = %(source.dir)s/main.py

# (list) Application requirements
# comma separated e.g. requirements = sqlite3,kivy
requirements = android,python3,kivy,kivymd,certifi,camera4kivy,gestures4kivy,requests,urllib3,chardet,idna,beautifulsoup4

# (str) Custom source folders for requirements
# Sets custom source for any requirements with recipes
# requirements.source.kivy = ../../kivy

# (str) Presplash of the application
#presplash.filename = %(source.dir)s/data/presplash.png

# (str) Icon of the application
#icon.filename = %(source.dir)s/data/icon.png

# (str) Supported orientation (one of landscape, sensorLandscape, portrait or all)
orientation = portrait

# (list) List of service to declare
#services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY

#
# OSX Specific
#

#
# author = © Copyright Info

# change the major version of python used by the app
osx.python_version = 3

# Kivy version to use
osx.kivy_version = 1.9.1

#
# Android specific
#

# (bool) Indicate if the application should be fullscreen or not
fullscreen = 0

# (string) Presplash background color (for android toolchain)
# Supported formats are: #RRGGBB #AARRGGBB or one of the following names:
# red, blue, green, black, white, gray, cyan, magenta, yellow, lightgray,
# darkgray, grey, lightgrey, darkgrey, aqua, fuchsia, lime, maroon, navy,
# olive, purple, silver, teal.
#android.presplash_color = #FFFFFF

# (string) Presplash animation using Lottie format.
# see https://lottiefiles.com/ for examples and https://airbnb.design/lottie/
# for general documentation.
# Lottie files can be created using various tools, like Adobe After Effect or Synfig.
#android.presplash_lottie = "path/to/lottie/file.json"

# (str) Adaptive icon of the application (used if Android API level is 26+ at runtime)
#icon.adaptive_foreground.filename = %(source.dir)s/data/icon_fg.png
#icon.adaptive_background.filename = %(source.dir)s/data/icon_bg.png

# (list) Permissions
android.permissions = INTERNET,CAMERA,RECORD_AUDIO,WRITE_EXTERNAL_STORAGE,READ_EXTERNAL_STORAGE

# (list) features (adds uses-feature -tags to manifest)
#android.features = android.hardware.usb.host

# (int) Target Android API, should be as high as possible.
android.api = 31

# (int) Minimum API your APK / AAB will support.
#android.minapi = 21

# (int) Android SDK version to use
#android.sdk = 20

# (str) Android NDK version to use
#android.ndk = 23b

# (int) Android NDK API to use. This is the minimum API your app will support, it should usually match android.minapi.
#android.ndk_api = 21

# (bool) Use --private data storage (True) or --dir public storage (False)
#android.private_storage = True

# (str) Android NDK directory (if empty, it will be automatically downloaded.)
#android.ndk_path =

# (str) Android SDK directory (if empty, it will be automatically downloaded.)
#android.sdk_path =

# (str) ANT directory (if empty, it will be automatically downloaded.)
#android.ant_path =

# (bool) If True, then skip trying to update the Android sdk
# This can be useful to avoid excess Internet downloads or save time
# when an update is due and you just want to test/build your package
# android.skip_update = False

# (bool) If True, then automatically accept SDK license
# agreements. This is intended for automation only. If set to False,
# the default, you will be shown the license when first running
# buildozer.
# android.accept_sdk_license = False

# (str) Android entry point, default is ok for Kivy-based app
#android.entrypoint = org.kivy.android.PythonActivity

# (str) Full name including package path of the Java class that implements Android Activity
# use that parameter together with android.entrypoint to set custom Java class instead of PythonActivity
#android.activity_class_name = org.kivy.android.PythonActivity

# (str) Extra xml to write directly inside the <manifest> element of AndroidManifest.xml
# use that parameter to provide a filename from where to load your custom XML code
#android.extra_manifest_xml = ./src/android/extra_manifest.xml

# (str) Extra xml to write directly inside the <manifest><application> tag of AndroidManifest.xml
# use that parameter to provide a filename from where to load your custom XML arguments:
#android.extra_manifest_application_arguments = ./src/android/extra_manifest_application_arguments.xml

# (str) Full name including package path of the Java class that implements Python Service
# use that parameter to set custom Java class instead of PythonService
#android.service_class_name = org.kivy.android.PythonService

# (str) Android app theme, default is ok for Kivy-based app
# android.apptheme = "@android:style/Theme.NoTitleBar"

# (list) Pattern to whitelist for the whole project
#android.whitelist =

# (str) Path to a custom whitelist file
#android.whitelist_src =

# (str) Path to a custom blacklist file
#android.blacklist_src =

# (list) List of Java .jar files to add to the libs so that pyjnius can access
# their classes. Don't add jars that you do not need, since extra jars can slow
# down the build process. Allows wildcards matching, for example:
# OUYA-ODK/libs/*.jar
#android.add_jars = foo.jar,bar.jar,path/to/more/*.jar

# (list) List of Java files to add to the android project (can be java or a
# directory containing the files)
#android.add_src =

# (list) Android AAR archives to add
#android.add_aars =

# (list) Put these files or directories in the apk assets directory.
# Either form may be used, and assets need not be in 'source.include_exts'.
# 1) android.add_assets = source_asset_relative_path
# 2) android.add_assets = source_asset_path:destination_asset_relative_path
#android.add_assets =

# (list) Gradle dependencies to add
#android.gradle_dependencies =

# (bool) Enable AndroidX support. Enable when 'android.gradle_dependencies'
# contains an 'androidx' package, or any package from Kotlin source.
# android.enable_androidx requires android.api >= 28
#android.enable_androidx = False

# (list) add java compile options
# this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option
# see https://developer.android.com/studio/write/java8-support for further information
# android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8"

# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
# please enclose in double quotes 
# e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
#android.add_gradle_repositories =

# (list) packaging options to add 
# see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
# can be necessary to solve conflicts in gradle_dependencies
# please enclose in double quotes 
# e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'"
#android.add_packaging_options =

# (list) Java classes to add as activities to the manifest.
#android.add_activities = com.example.ExampleActivity

# (str) OUYA Console category. Should be one of GAME or APP
# If you leave this blank, OUYA support will not be enabled
#android.ouya.category = GAME

# (str) Filename of OUYA Console icon. It must be a 732x412 png image.
#android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png

# (str) XML file to include as an intent filters in <activity> tag
#android.manifest.intent_filters =

# (list) Copy these files to src/main/res/xml/ (used for example with intent-filters)
#android.res_xml = PATH_TO_FILE,

# (str) launchMode to set for the main activity
#android.manifest.launch_mode = standard

# (list) Android additional libraries to copy into libs/armeabi
#android.add_libs_armeabi = libs/android/*.so
#android.add_libs_armeabi_v7a = libs/android-v7/*.so
#android.add_libs_arm64_v8a = libs/android-v8/*.so
#android.add_libs_x86 = libs/android-x86/*.so
#android.add_libs_mips = libs/android-mips/*.so

# (bool) Indicate whether the screen should stay on
# Don't forget to add the WAKE_LOCK permission if you set this to True
#android.wakelock = False

# (list) Android application meta-data to set (key=value format)
#android.meta_data =

# (list) Android library project to add (will be added in the
# project.properties automatically.)
#android.library_references =

# (list) Android shared libraries which will be added to AndroidManifest.xml using <uses-library> tag
#android.uses_library =

# (str) Android logcat filters to use
#android.logcat_filters = *:S python:D

# (bool) Android logcat only display log for activity's pid
#android.logcat_pid_only = False

# (str) Android additional adb arguments
#android.adb_args = -H host.docker.internal

# (bool) Copy library instead of making a libpymodules.so
#android.copy_libs = 1

# (list) The Android archs to build for, choices: armeabi-v7a, arm64-v8a, x86, x86_64
# In past, was `android.arch` as we weren't supporting builds for multiple archs at the same time.
android.archs = arm64-v8a, armeabi-v7a

# (int) overrides automatic versionCode computation (used in build.gradle)
# this is not the same as app version and should only be edited if you know what you're doing
# android.numeric_version = 1

# (bool) enables Android auto backup feature (Android API >=23)
android.allow_backup = True

# (str) XML file for custom backup rules (see official auto backup documentation)
# android.backup_rules =

# (str) If you need to insert variables into your AndroidManifest.xml file,
# you can do so with the manifestPlaceholders property.
# This property takes a map of key-value pairs. (via a string)
# Usage example : android.manifest_placeholders = [myCustomUrl:\"org.kivy.customurl\"]
# android.manifest_placeholders = [:]

# (bool) disables the compilation of py to pyc/pyo files when packaging
# android.no-compile-pyo = True

# (str) The format used to package the app for release mode (aab or apk or aar).
# android.release_artifact = aab

# (str) The format used to package the app for debug mode (apk or aar).
# android.debug_artifact = apk

#
# Python for android (p4a) specific
#

# (str) python-for-android URL to use for checkout
#p4a.url =

# (str) python-for-android fork to use in case if p4a.url is not specified, defaults to upstream (kivy)
#p4a.fork = kivy

# (str) python-for-android branch to use, defaults to master
#p4a.branch = master

# (str) python-for-android specific commit to use, defaults to HEAD, must be within p4a.branch
#p4a.commit = HEAD

# (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
#p4a.source_dir =

# (str) The directory in which python-for-android should look for your own build recipes (if any)
#p4a.local_recipes =

# (str) Filename to the hook for p4a
p4a.hook = camerax_provider/gradle_options.py

# (str) Bootstrap to use for android builds
# p4a.bootstrap = sdl2

# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
#p4a.port =

# Control passing the --use-setup-py vs --ignore-setup-py to p4a
# "in the future" --use-setup-py is going to be the default behaviour in p4a, right now it is not
# Setting this to false will pass --ignore-setup-py, true will pass --use-setup-py
# NOTE: this is general setuptools integration, having pyproject.toml is enough, no need to generate
# setup.py if you're using Poetry, but you need to add "toml" to source.include_exts.
#p4a.setup_py = false

# (str) extra command line arguments to pass when invoking pythonforandroid.toolchain
#p4a.extra_args =



#
# iOS specific
#

# (str) Path to a custom kivy-ios folder
#ios.kivy_ios_dir = ../kivy-ios
# Alternately, specify the URL and branch of a git checkout:
ios.kivy_ios_url = https://github.com/kivy/kivy-ios
ios.kivy_ios_branch = master

# Another platform dependency: ios-deploy
# Uncomment to use a custom checkout
#ios.ios_deploy_dir = ../ios_deploy
# Or specify URL and branch
ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
ios.ios_deploy_branch = 1.10.0

# (bool) Whether or not to sign the code
ios.codesign.allowed = false

# (str) Name of the certificate to use for signing the debug version
# Get a list of available identities: buildozer ios list_identities
#ios.codesign.debug = "iPhone Developer: <lastname> <firstname> (<hexstring>)"

# (str) The development team to use for signing the debug version
#ios.codesign.development_team.debug = <hexstring>

# (str) Name of the certificate to use for signing the release version
#ios.codesign.release = %(ios.codesign.debug)s

# (str) The development team to use for signing the release version
#ios.codesign.development_team.release = <hexstring>

# (str) URL pointing to .ipa file to be installed
# This option should be defined along with `display_image_url` and `full_size_image_url` options.
#ios.manifest.app_url =

# (str) URL pointing to an icon (57x57px) to be displayed during download
# This option should be defined along with `app_url` and `full_size_image_url` options.
#ios.manifest.display_image_url =

# (str) URL pointing to a large icon (512x512px) to be used by iTunes
# This option should be defined along with `app_url` and `display_image_url` options.
#ios.manifest.full_size_image_url =


[buildozer]

# (int) Log level (0 = error only, 1 = info, 2 = debug (with command output))
log_level = 2

# (int) Display warning if buildozer is run as root (0 = False, 1 = True)
warn_on_root = 1

# (str) Path to build artifact storage, absolute or relative to spec file
# build_dir = ./.buildozer

# (str) Path to build output (i.e. .apk, .aab, .ipa) storage
# bin_dir = ./bin

#    -----------------------------------------------------------------------------
#    List as sections
#
#    You can define all the "list" as [section:key].
#    Each line will be considered as a option to the list.
#    Let's take [app] / source.exclude_patterns.
#    Instead of doing:
#
#[app]
#source.exclude_patterns = license,data/audio/*.wav,data/images/original/*
#
#    This can be translated into:
#
#[app:source.exclude_patterns]
#license
#data/audio/*.wav
#data/images/original/*
#


#    -----------------------------------------------------------------------------
#    Profiles
#
#    You can extend section / key with a profile
#    For example, you want to deploy a demo version of your application without
#    HD content. You could first change the title to add "(demo)" in the name
#    and extend the excluded directories to remove the HD content.
#
#[app@demo]
#title = My Application (demo)
#
#[app:source.exclude_patterns@demo]
#images/hd/*
#
#    Then, invoke the command line with the "demo" profile:
#
#buildozer --profile demo android debug

Logs

Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x40 in tid 10919 (SDLThread), pid 10882 (org.test.myapp)

[RobertFlatt]

This should probably be a support request on Discord or GoogleGroups.

Does the app use Pyjnius?

[walfredcutaran]

Pyjnius as a requirement in the spec file, no. But when i see buildozer debug is ran, im seeing some pyjnius being extracted if i am not mistaken...

[walfredcutaran]

Update: the application works on android 9 and 10 only, weird on later devices it gives that error

[walfredcutaran]

What's weirder is it works before last month on my android 12 device... Now it doesn't

[RobertFlatt]

The "weird" you describe is normal for memory issues in any program, null pointer is also an example of a memory issue. It looks like the code in your app contains a memory management issue, the question is why?

Perhaps I was not clear. Does the app Python code contain Pyjnius autoclass statements?

[walfredcutaran]

here is my main.py file if you like to see because I am unsure on what pyjnius statements you are referring to.. btw I am just a student developer creating our research application...

import certifi
import os
# segmentation
# import numpy as np
# import matplotlib.pyplot as plt

from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.uix.button import MDFlatButton
from kivymd.uix.dialog import MDDialog
from kivymd.uix.screen import MDScreen
from kivymd.app import MDApp
from kivymd.uix.filemanager import MDFileManager
from kivy.lang import Builder
# import cv2
from PIL import Image



os.environ['SSL_CERT_FILE'] = certifi.where()  # certification

kv = '''
BoxLayout:
    orientation: 'vertical'      
    MDTopAppBar:
        title: "Prototype"
        use_overflow: True
        right_action_items:
            [
            ["home-outline", lambda x: app.show_alert_dialog(), "Home", "Home"],
            ["account-group-outline", lambda x: app.show_alert_dialog(), "About us", "About us"],
            ["help-circle-outline", lambda x: app.show_alert_dialog(), "Help", "Help"],
            ]
        elevation: 15
    MDBottomAppBar:
        MDTopAppBar:
            icon: 'language-python'
            mode: 'end'
            type: 'bottom'
            left_action_items: [["android", lambda x: app.show_alert_dialog()]]
    FloatLayout:
        Image:
            id: image_path
            source: 'x.png'
            nocache: True
            pos_hint:{'center_x': 0.5, 'center_y': 0.9}
            size_hint: None, None
            height: 550
            width: 400
        MDFillRoundFlatIconButton
            icon: "button-pointer"
            text: "Choose Image"
            font_size: 40
            pos_hint:{'center_x': 0.5, 'center_y': 0.5}
            size_hint: 0.6, 0.3
            on_release: app.open_file_manager()
        MDFillRoundFlatIconButton
            icon:"camera"
            text: "Capture"
            font_size: 40
            pos_hint:{'center_x': 0.5, 'center_y': 0.3}
            size_hint: 0.6, 0.3
            on_release: app.show_alert_dialog()
'''


class WindowOne(Screen):
    pass


class PrototypeApp(MDApp):
    # permissions
    from android.permissions import request_permissions, Permission
    request_permissions([Permission.READ_EXTERNAL_STORAGE, Permission.WRITE_EXTERNAL_STORAGE])

    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        # popup init
        self.dialog = MDDialog(
            text="Feature not available yet!",
            # radius=[20, 7, 20, 7],
        )

        # kv file init
        self.main_widget = Builder.load_string(kv)

        # file manager init
        self.file_manager_obj = MDFileManager(
            select_path=self.select_path,
            exit_manager=self.exit_manager,
            preview=True
        )

    def open_file_manager(self):
        try:
            from android.storage import primary_external_storage_path
            primary_ext_storage = primary_external_storage_path()
            self.file_manager_obj.show(primary_ext_storage)

        except Exception:
            self.dialog = MDDialog(
                text=Exception,
                radius=[20, 7, 20, 7],
            )


    def select_path(self, path):
        print(path)

        self.main_widget.ids.image_path.height = 500 # image size
        self.main_widget.ids.image_path.width = 400 # ^^ ^^ ^^
        self.main_widget.ids.image_path.reload() # refresh image
        self.main_widget.ids.image_path.source = path # replace the old path to new path
        self.exit_manager() # to go back to home screen after choosing
        '''
                try:
            img = cv2.imread(path)
            img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
            h, w, c = img.shape
            # resizing
            if w > 1000:
                new_w = 1000
                ar = w / h
                new_h = int(new_w / ar)
                img = cv2.resize(img, (new_w, new_h), interpolation=cv2.INTER_AREA)
            # cv2.imshow('Resized', img)
            # cv2.waitKey(0)
            plt.imshow(img)
            plt.show()
            img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
            ret, thresh = cv2.threshold(img_gray, 80, 255, cv2.THRESH_BINARY_INV)
            plt.imshow(thresh, cmap='gray')
            plt.imshow(thresh);
            plt.show()
            # cv2.imshow('Black and White', thresh)
            # cv2.waitKey(0)
            # dilation
            kernel = np.ones((3, 85), np.uint8)
            dilated = cv2.dilate(thresh, kernel, iterations=1)
            plt.imshow(dilated, cmap='gray');
            (contours, heirarchy) = cv2.findContours(dilated.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
            sorted_contours_lines = sorted(contours, key=lambda ctr: cv2.boundingRect(ctr)[1])  # (x, y, w, h)
            img2 = img.copy()
            for ctr in sorted_contours_lines:
                x, y, w, h = cv2.boundingRect(ctr)
                cv2.rectangle(img2, (x, y), (x + w, y + h), (40, 100, 250), 2)
            plt.imshow(img2)
            plt.show()
            # cv2.imshow('Bounding Box', img2)
            # cv2.waitKey(0)
            kernel = np.ones((3, 15), np.uint8)
            dilated2 = cv2.dilate(thresh, kernel, iterations=1)
            plt.imshow(dilated2, cmap='gray');
            img3 = img.copy()
            words_list = []
            for line in sorted_contours_lines:
                # roi of each line
                x, y, w, h = cv2.boundingRect(line)
                roi_line = dilated2[y:y + w, x:x + w]
                # draw contours on each word
                (cnt, heirarchy) = cv2.findContours(roi_line.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
                sorted_contour_words = sorted(cnt, key=lambda cntr: cv2.boundingRect(cntr)[0])
                for word in sorted_contour_words:
                    if cv2.contourArea(word) < 400:
                        continue
                    x2, y2, w2, h2 = cv2.boundingRect(word)
                    words_list.append([x + x2, y + y2, x + x2 + w2, y + y2 + h2])
                    cv2.rectangle(img3, (x + x2, y + y2), (x + x2 + w2, y + y2 + h2), (255, 255, 100), 2)
            plt.imshow(img3)
            plt.show()
            # cv2.imshow('Word by word', img3)
            # cv2.waitKey(0)
            ninth_word = words_list[8]
            roi_9 = img[ninth_word[1]:ninth_word[3], ninth_word[0]:ninth_word[2]]
            plt.imshow(roi_9);
            plt.show()
            
            
            except Exception as e:
                print(e)
        '''




        # end image processing




    def segmentation(self, img_path):
        pass

    def exit_manager(self):
        self.file_manager_obj.close()

    def navigation_draw(self):
        print("Navigation Pressed!")

    def build(self):
        self.theme_cls.primary_palette = "Indigo"
        self.theme_cls.theme_style = "Light"
        return self.main_widget

    # temp

    def callback(self, instance_action_appbar_button):
        print(instance_action_appbar_button)

    def show_alert_dialog(self):
        self.dialog.open()
    # end temp


if __name__ == '__main__':
    PrototypeApp().run()

[RobertFlatt]

To answer my question search for autoclass, it does not exist in this file. So the answer is 'no'. This type of error is usually autoclass related, So next...

The use of request permissions, is probably a problem https://github.com/Android-for-Python/Android-for-Python-Users#user-permissions , its going to be called at class instantiation which violates the Kivy lifecycle https://kivy.org/doc/stable/guide/basic.html#kivy-app-life-cycle and presumably breaks Android too. The problem, I don't know; but breaking Android makes it a good candidate.

The file manager code is not going to work on any Android device > 10
See https://github.com/Android-for-Python/Android-for-Python-Users#android-storage

That should get you started. Happy to point you to the documentation, but I'm not the person to debug your code for you. This forum is for development issues, please post usage questions to the user groups.

[walfredcutaran]

Oh i see, i really appreciate your response sir this means a lot... Im going to close the thread for now and try to post this to google groups as you mentioned... Thank you very much for your time!