Fortran error when I enter an input - segmentation fault

when I enter the first input I receive this error

Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error:#0 0xffffffff...

here is my code leading up to where the error occurs

program helloworld

implicit none

!gets inputs
character(len = :), allocatable :: point1
real :: pint1V(2)
real :: pint2V(2)
real :: pint3V(2)
character(len = :), allocatable :: point2
character(len = :), allocatable :: point3

!gets lengths
real :: length12
real :: length32
real :: length31
!gets angle of each point
real :: angle1
real :: angle2
real :: angle3 


print *, 'input point 1 as "a + bi"'
read *, point1
print *, 'input point 2 as "a + bi"'
read *, point2
print *,'input point 3 as "a + bi"'
read *, point3