CustomCircularProgressIndicator

Configuration

AS: 2020.3.1 p3 (Arctic Fox)
AGP: 7.0.3
Kotlin: 1.5.31
Compose: 1.0.5

CustomCircularProgressIndicator.kt

import androidx.compose.foundation.Canvas
import androidx.compose.foundation.focusable
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.progressSemantics
import androidx.compose.material.MaterialTheme
import androidx.compose.material.ProgressIndicatorDefaults
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.StrokeCap
import androidx.compose.ui.graphics.drawscope.DrawScope
import androidx.compose.ui.graphics.drawscope.Stroke
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

// taken from androidx.compose.material.ProgressIndicator.kt

@Composable
fun CustomCircularProgressIndicator(
  progress: Float,
  modifier: Modifier = Modifier,
  color: Color = MaterialTheme.colors.primary,
  strokeWidth: Dp = ProgressIndicatorDefaults.StrokeWidth,
  strokeCap: StrokeCap = StrokeCap.Butt,
) {
  val stroke = with(LocalDensity.current) {
    Stroke(width = strokeWidth.toPx(), cap = StrokeCap.Round) // works
    // Stroke(width = strokeWidth.toPx(), cap = strokeCap) // compiler goes brrrrrrrr
  }
  Canvas(
    modifier
      .progressSemantics(progress)
      .size(40.dp)
      .focusable()
  ) {
    // Start at 12 O'clock
    val startAngle = 270f
    val sweep = progress * 360f
    drawDeterminateCircularIndicator(startAngle, sweep, color, stroke)
  }
}

private fun DrawScope.drawDeterminateCircularIndicator(
  startAngle: Float,
  sweep: Float,
  color: Color,
  stroke: Stroke
) = drawCircularIndicator(startAngle, sweep, color, stroke)

private fun DrawScope.drawCircularIndicator(
  startAngle: Float,
  sweep: Float,
  color: Color,
  stroke: Stroke
) {
  // To draw this circle we need a rect with edges that line up with the midpoint of the stroke.
  // To do this we need to remove half the stroke width from the total diameter for both sides.
  val diameterOffset = stroke.width / 2
  val arcDimen = size.width - 2 * diameterOffset
  drawArc(
    color = color,
    startAngle = startAngle,
    sweepAngle = sweep,
    useCenter = false,
    topLeft = Offset(diameterOffset, diameterOffset),
    size = Size(arcDimen, arcDimen),
    style = stroke
  )
}

@Preview
@Composable
fun CustomCircularProgressIndicatorPreview() {
    CustomCircularProgressIndicator(
      progress = .2f,
      strokeWidth = 5.dp,
      color = Color(0xFF2CE080),
      strokeCap = StrokeCap.Round,
      modifier = Modifier.size(200.dp)
    )
}

Stacktrace

java.lang.AssertionError: Assertion failed
	at org.jetbrains.kotlin.ir.util.AdditionalIrUtilsKt.getPropertyGetter(AdditionalIrUtils.kt:241)
	at androidx.compose.compiler.plugins.kotlin.lower.AbstractComposeLowering.unboxValueIfInline(AbstractComposeLowering.kt:303)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.irChanged(ComposableFunctionBodyTransformer.kt:1911)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.buildPreambleStatementsAndReturnIfSkippingPossible(ComposableFunctionBodyTransformer.kt:1293)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.visitRestartableComposableFunction(ComposableFunctionBodyTransformer.kt:1038)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.visitFunctionInScope(ComposableFunctionBodyTransformer.kt:697)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.visitFunction(ComposableFunctionBodyTransformer.kt:666)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitSimpleFunction(IrElementTransformerVoid.kt:72)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitSimpleFunction(IrElementTransformerVoid.kt:73)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitSimpleFunction(IrElementTransformerVoid.kt:24)
	at org.jetbrains.kotlin.ir.declarations.IrSimpleFunction.accept(IrSimpleFunction.kt:28)
	at org.jetbrains.kotlin.ir.IrElement$DefaultImpls.transform(IrElement.kt:32)
	at org.jetbrains.kotlin.ir.IrElementBase.transform(IrElementBase.kt:19)
	at org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl.transformChildren(IrFileImpl.kt:89)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitPackageFragment(IrElementTransformerVoid.kt:41)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitFile(IrElementTransformerVoid.kt:47)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.visitFile(ComposableFunctionBodyTransformer.kt:1708)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitFile(IrElementTransformerVoid.kt:48)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitFile(IrElementTransformerVoid.kt:24)
	at org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl.accept(IrFileImpl.kt:81)
	at org.jetbrains.kotlin.ir.declarations.IrFile.transform(IrFile.kt:52)
	at org.jetbrains.kotlin.ir.declarations.impl.IrModuleFragmentImpl.transformChildren(IrModuleFragmentImpl.kt:45)
	at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoidKt.transformChildrenVoid(IrElementTransformerVoid.kt:330)
	at androidx.compose.compiler.plugins.kotlin.lower.ComposableFunctionBodyTransformer.lower(ComposableFunctionBodyTransformer.kt:455)
	at androidx.compose.compiler.plugins.kotlin.ComposeIrGenerationExtension.generate(ComposeIrGenerationExtension.kt:137)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.convertToIr$lambda-1(JvmIrCodegenFactory.kt:126)
	at org.jetbrains.kotlin.psi2ir.Psi2IrTranslator.generateModuleFragment(Psi2IrTranslator.kt:89)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.convertToIr(JvmIrCodegenFactory.kt:146)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.convertToIr$default(JvmIrCodegenFactory.kt:64)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModule(JvmIrCodegenFactory.kt:59)
	at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:321)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:113)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:56)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:169)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:52)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:92)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:44)
	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:98)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:412)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:112)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:358)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally$default(IncrementalCompilerRunner.kt:300)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:160)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:81)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:607)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:96)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1658)
	at jdk.internal.reflect.GeneratedMethodAccessor114.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)

I had the same issue, thanks for posting