[CMake] Diagnostics for unclosed generator expressions?

[Johannes Zarl]

Hi,

Today I learned the hard way that cmake does not provide any diagnostic about 
unclosed generator expressions.

Consider the following:
add_test(
  NAME generator_expression_unclosed 
  COMMAND
  ${CMAKE_COMMAND} -E echo "$<0:Unclosed expression gives a warning?"
)

cmake happily accepts this without any diagnostic, whereas regular variables 
are diagnosed correctly:

message(STATUS "${test")

gives:

  Syntax error in cmake code at
    /home/zing/scratch/cmake_testbed/CMakeLists.txt:143
  when parsing string
    ${unclosed
  syntax error, unexpected $end, expecting } (10)


Should I file a bug report on this issue?

Cheers,
  Johannes