From zefram@fysh.org

my Int $a = Inf
Cannot find method 'value'
my Int $a = NaN
Cannot find method 'value'

It is correct that these statements produce exceptions, but this
particular exception does not describe the situation well. A much better
exception in produced when initialising to a regular Num​:

my Int $a = 3.5e0
===SORRY!=== Error while compiling <unknown file>
Cannot assign a literal of type Num (3.5e0) to a variable of type Int. You can declare the variable to be of type Real, or try to coerce the value with 3.5e0.Int or Int(3.5e0), or just write the value as 3
at <unknown file>​:1
------> my Int $a = ^3.5e0

A much more mundane exception is produced if the initialising value
is not stated as a literal, and in this case the message is consistent
between kinds of Num​:

my $b = Inf
Inf
my Int $a = $b
Type check failed in assignment to $a; expected Int but got Num
  in block <unit> at <unknown file>​:1
my $b = 3.5e0
3.5
my Int $a = $b
Type check failed in assignment to $a; expected Int but got Num
  in block <unit> at <unknown file>​:1

-zefram

From @AlexDaniel

See this​: https://rt.perl.org/Public/Bug/Display.html?id=126990

The RT System itself - Status changed from 'new' to 'open'

From zefram@fysh.org

Alex Jakimenko via RT wrote​:

See this​: https://rt.perl.org/Public/Bug/Display.html?id=126990

Ah, quite right. My [perl #​127011] duplicates the "LTA error message"
portion of your [perl #​126990]. Mine can therefore be closed, if the
.Range portion of yours doesn't confound dealing with the issue there.

-zefram

From @dogbert17

Duplicate of #​126990 which has been resolved.

@dogbert17 - Status changed from 'open' to 'resolved'