Compose Resource incorrectly reads string chunks from a file

[AChep]

Describe the bug
App crashes during base64 decoding of the resources.

If I go to the file itself and read the given range

> dd if=strings.commonMain.cvr ibs=1 skip=23401 count=83
string|feat_item_show_barcode_text|RW5jb2RlIGEgdGV4dCBhcyBkaWZmZXJlbnQgYmFyY29kZXMu
83+0 records in
0+1 records out
83 bytes copied, 7.6769e-05 s, 1.1 MB/s

we can see that the range is correct. However the record data is different to what Compose resources reads:

RW5jb2RlIGEgdGV4dCBhcyBkaWZmZXJlbnQgY
RW5jb2RlIGEgdGV4dCBhcyBkaWZmZXJlbnQgYmFyY29kZXMu

if we investigate further we see that the ResourceReader.desktop.kt has read the following sequence of bytes:

[115, 116, 114, 105, 110, 103, 124, 102, 101, 97, 116, 95, 105, 116, 101, 109, 95, 115, 104, 111, 119, 95, 98, 97, 114, 99, 111, 100, 101, 95, 116, 101, 120, 116, 124, 82, 87, 53, 106, 98, 50, 82, 108, 73, 71, 69, 103, 100, 71, 86, 52, 100, 67, 66, 104, 99, 121, 66, 107, 97, 87, 90, 109, 90, 88, 74, 108, 98, 110, 81, 103, 89, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

if I pause there and execute two different commands:

String(getResourceAsStream(path).use { it.readAllBytes() }).slice(offset.toInt()..(offset+size).toInt())
// prints string|feat_item_show_barcode_text|RW5jb2RlIGEgdGV4dCBhcyBkaWZmZXJlbnQgYmFyY29kZXMu which is correct
String(getResourceAsStream(path).use { it.skipNBytes(offset); it.readNBytes(size.toInt()) })
// prints string|feat_item_show_barcode_text|RW5jb2RlIGEgdGV4dCBhcyBkaWZmZXJlbnQgYmFyY29kZXMu which is correct
String(getResourceAsStream(path).use { it.skip(offset); it.read(result, 0, size.toInt()); result })
// prints string|feat_item_show_barcode_text|RW5jb2RlIGEgdGV4dCBhcyBkaWZmZXJlbnQgY which is not correct

The idea why it happens is because both .skip() and .read() methods that the current implementation uses can skip and read less than requested.

Affected platforms

• Desktop (Windows, Linux, macOS)

Versions

• Libraries:
  • Compose Multiplatform version: 1.6.11
• Kotlin version: 2.0.0

To Reproduce

1. Clone AChep/keyguard-app@1ceb9f5
2. Execute :desktopApp:run Gradle task
3. Enter any data in the app to skip the setup flow and head straight to Settings / Other / Features overview

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.