Closed
Description
While this correctly compiles:
object Main extends App {
val MAX = 10
val s1, s2, target = new Array[Long](MAX)
var i = 0
while (i < MAX) {
target(i) = s1(i) + s2(i)
i+= 1
}
}simply adding another unused var crashes the compiler
object Main extends App {
val MAX = 10
val s1, s2, target = new Array[Long](MAX)
var i, j = 0
while (i < MAX) {
target(i) = s1(i) + s2(i)
i+= 1
}
}the output log is this:
exception while transforming Main.i = Main.i.+(1) of class class dotty.tools.dotc.ast.Trees$Assign # 8267
exception while transforming {
Main.target.update(Main.i, Main.s1.apply(Main.i).+(Main.s2.apply(Main.i)))
Main.i = Main.i.+(1)
} of class class dotty.tools.dotc.ast.Trees$Block # 8268
exception while transforming {
{
Main.target.update(Main.i, Main.s1.apply(Main.i).+(Main.s2.apply(Main.i)))
Main.i = Main.i.+(1)
}
while$()
} of class class dotty.tools.dotc.ast.Trees$Block # 8270
exception while transforming if Main.i.<(Main.MAX) then {
{
Main.target.update(Main.i, Main.s1.apply(Main.i).+(Main.s2.apply(Main.i)))
Main.i = Main.i.+(1)
}
while$()
} else () of class class dotty.tools.dotc.ast.Trees$If # 8271
exception while transforming def while$(): Unit =
if Main.i.<(Main.MAX) then {
{
Main.target.update(Main.i, Main.s1.apply(Main.i).+(Main.s2.apply(Main.i)))
Main.i = Main.i.+(1)
}
while$()
} else () of class class dotty.tools.dotc.ast.Trees$DefDef # 8272
exception while transforming {
def while$(): Unit =
if Main.i.<(Main.MAX) then {
{
Main.target.update(Main.i,
Main.s1.apply(Main.i).+(Main.s2.apply(Main.i))
)
Main.i = Main.i.+(1)
}
while$()
} else ()
while$()
} of class class dotty.tools.dotc.ast.Trees$Block # 8274
exception while transforming () extends Object() with App { this: Main.type =>
val MAX: Int = 10
val s1: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
val s2: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
val target: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
var i: Int = 0
var j: Int = 0
{
def while$(): Unit =
if Main.i.<(Main.MAX) then {
{
Main.target.update(Main.i,
Main.s1.apply(Main.i).+(Main.s2.apply(Main.i))
)
Main.i = Main.i.+(1)
}
while$()
} else ()
while$()
}
} of class class dotty.tools.dotc.ast.Trees$Template # 8275
exception while transforming final module class Main$() extends Object() with App { this: Main.type =>
val MAX: Int = 10
val s1: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
val s2: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
val target: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
var i: Int = 0
var j: Int = 0
{
def while$(): Unit =
if Main.i.<(Main.MAX) then {
{
Main.target.update(Main.i,
Main.s1.apply(Main.i).+(Main.s2.apply(Main.i))
)
Main.i = Main.i.+(1)
}
while$()
} else ()
while$()
}
} of class class dotty.tools.dotc.ast.Trees$TypeDef # 8276
exception while transforming package <empty> {
final lazy module val Main: Main$ = new Main$()
final module class Main$() extends Object() with App { this: Main.type =>
val MAX: Int = 10
val s1: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
val s2: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
val target: Array[Long] = dotty.runtime.Arrays.newLongArray(Main.MAX)
var i: Int = 0
var j: Int = 0
{
def while$(): Unit =
if Main.i.<(Main.MAX) then {
{
Main.target.update(Main.i,
Main.s1.apply(Main.i).+(Main.s2.apply(Main.i))
)
Main.i = Main.i.+(1)
}
while$()
} else ()
while$()
}
}
} of class class dotty.tools.dotc.ast.Trees$PackageDef # 8277
Hope this tracking is useful!