Out of project font causes the app to crash with an unclear error message

[modulovalue]

Steps to Reproduce

1. add this font to the pubspec.yaml Comic-Sans-Regular.ttf like this

fonts:
    - family: Comicsans
      fonts:
        - asset: ../../../flutter-desktop-embedding/example/flutter_app/fonts/Comic-Sans-Regular.ttf

2. try to run the app inside an iOS Simulator and it crashes with the following error:

VERBOSE-2:FontFamily.cpp(184)] Could not get cmap table size!
[VERBOSE-2:FontFamily.cpp(184)] Could not get cmap table size!
[VERBOSE-3:FontCollection.cpp(95)] nTypefaces == 0

I expected that the file would either load or at least an error message would print like that the asset was not found.

Using this font vice versa in google/flutter-desktop-embedding did not crash the app but a fallback font was used there with the following error message printed to the XCode console:

[ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!

[ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!

[ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!

[ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!

[ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!

Flutter doctor:

[✓] Flutter (Channel master, v1.1.5-pre.37, on Mac OS X 10.14.1 18B75, locale de-DE)
    • Flutter version 1.1.5-pre.37 at /Users/valauskasmodestas/Desktop/flutter
    • Framework revision faae8bde78 (7 days ago), 2018-12-28 23:03:40 -0500
    • Engine revision 995e3247fe
    • Dart version 2.1.1 (build 2.1.1-dev.0.1 88e6fe0f67)

[!] Android toolchain - develop for Android devices (Android SDK version 27.0.3)
    • Android SDK at /Users/valauskasmodestas/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 27.0.3
    • Java binary at: /Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/bin/java
    • Java version Java(TM) SE Runtime Environment (build 1.8.0_152-ea-b05)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses

[!] iOS toolchain - develop for iOS devices (Xcode 10.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 10.1, Build version 10B61
    ✗ Verify that all connected devices have been paired with this computer in Xcode.
      If all devices have been paired, libimobiledevice and ideviceinstaller may require updating.
      To update with Brew, run:
        brew update
        brew uninstall --ignore-dependencies libimobiledevice
        brew uninstall --ignore-dependencies usbmuxd
        brew install --HEAD usbmuxd
        brew unlink usbmuxd
        brew link usbmuxd
        brew install --HEAD libimobiledevice
        brew install ideviceinstaller
    • ios-deploy 1.9.2
    ✗ ios-deploy out of date (1.9.4 is required). To upgrade with Brew:
        brew upgrade ios-deploy
    • CocoaPods version 1.5.3

[kangwang1988]

@GaryQian
Any ideas towards this issue?

[GaryQian]

I've seen that error before, but it usually ended up being an unrelated or non-flutter issue such as a corrupted font. I think that error occurs whenever a font is somehow improperly loaded and used. I can try to repro and look at it deeper.

[kangwang1988]

@modulovalue
A minimal demo project which can reproduce this issue would be much helpful.

[modulovalue]

font_error_demo

[zoechi]

Looks like #19791, #8403

[jonahwilliams]

Duplicate of #8403

[david-daming]

I delete the fonts folder and create it again, then download the ttf file again, the issue fixed! I guess it may be caused by the file error.

[github-actions]

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