🐛 LineChart crash in showPopup (IndexOutOfBoundsException) even when caller guards empty data

[lopspower]

🐛 LineChart crash in showPopup (IndexOutOfBoundsException)

Hi 👋
Thanks for the library 🙏

I’m getting a crash in LineChart inside showPopup (LineChart.kt:270).
Important detail: this is NOT simply because my data list is empty, because I already guard it right before rendering the chart:

if (data.isEmpty()) return

LineChart(
        modifier = Modifier.fillMaxSize()
            .padding(start = 14.dp, end = 14.dp, top = 10.dp, bottom = 6.dp),
        data = data,
        animationMode = AnimationMode.Together(delayBuilder = { it * 100L }),
        popupProperties = PopupProperties(
            textStyle = TextStyle(
                fontSize = 10.sp,
                fontWeight = FontWeight.SemiBold,
                color = MaterialTheme.colorScheme.primary,
                fontFamily = FontFamily(Font(Res.font.myfont))
            ),
            contentBuilder = { popup ->
                CurrencyHelper.priceFormat(popup.value, price.profileCurrency, isFrench)
            },
            containerColor = Color.White
        ),
        indicatorProperties = HorizontalIndicatorProperties(
            textStyle = TextStyle(
                fontSize = 10.sp,
                fontFamily = FontFamily(Font(Res.font.myfont)),
                color = Color.White
            ),
            contentBuilder = {
                CurrencyHelper.priceFormat(it, price.profileCurrency, isFrench)
            },
        ),
        labelHelperProperties = LabelHelperProperties(
            textStyle = TextStyle(
                fontSize = 11.sp,
                fontWeight = FontWeight.SemiBold,
                fontFamily = FontFamily(Font(Res.font.myfont)),
                color = Color.White
            )
        ),
        labelHelperPadding = 12.dp,
        labelProperties = LabelProperties(
            enabled = true,
            padding = 4.dp,
            labels = dates,
            textStyle = TextStyle(
                fontSize = 10.sp,
                fontFamily = FontFamily(Font(Res.font.myfont)),
                color = Color.White
            ),
            rotation = LabelProperties.Rotation(mode = Mode.Force, degree = 0f, padding = 4.dp)
        ),
        minValue = min,
        maxValue = max,
    )

Crash

Fatal Exception: java.lang.IndexOutOfBoundsException: index: 0, size: 0
at androidx.compose.runtime.external.kotlinx.collections.immutable.internal.ListImplementation.checkElementIndex$runtime(ListImplementation.kt:15)
at androidx.compose.runtime.external.kotlinx.collections.immutable.implementations.immutableList.SmallPersistentVector.get(SmallPersistentVector.kt:146)
at androidx.compose.runtime.snapshots.SnapshotStateList.get(SnapshotStateList.android.kt:79)
at ir.ehsannarmani.compose_charts.LineChartKt.LineChart_tpvImbo$showPopup(LineChart.kt:270)

[ehsannarmani]

Hi @lopspower , i did not understand what you mean, is it hapenning when data is empty?

[lopspower]

Hi @ehsannarmani
I’ve shared all the information I have on my side. I’m using your library in production and I’m seeing this crash for some users.
On my side, I’m already checking that the data isn’t empty, but despite that there’s still a crash in your library here:

showPopup (LineChart.kt:270)

Could you help me identify what might be causing it?

[sproctor]

Can you provide a reproduction of this using the latest version? I can't reproduce it from your snippet.