GitLab

There is following code:

cmake_minimum_required(VERSION 3.12)
project(test CXX)
add_executable(foo foo.cpp)

set_target_properties(
   foo
   PROPERTIES
   "a" "$<GENEX_EVAL:$<TARGET_PROPERTY:b>>"
   "b" "$<GENEX_EVAL:$<TARGET_PROPERTY:c>>"
   "c" "$<GENEX_EVAL:$<TARGET_PROPERTY:d>>"
   "d" "$<1:macarena>"
   )

target_compile_options(foo PRIVATE "$<TARGET_GENEX_EVAL:foo,$<TARGET_PROPERTY:foo,a>>")

a reads b, b reads c, c reads d, d have to be expanded as macarena.

I expect compilation error due to unknown compiler option macarena.

But:

• cmake 3.13.1 on Linux(Centos 7) just crashes.
• cmake 3.12.4 on Windows 10 produces following error:

CMake Error at CMakeLists.txt:14 (target_compile_options):

  Error evaluating generator expression:

    $<GENEX_EVAL:$<TARGET_PROPERTY:c>>

  Dependency loop found.


CMake Error at CMakeLists.txt:14 (target_compile_options):
  Loop step 1

    $<GENEX_EVAL:$<TARGET_PROPERTY:b>>



CMake Error at CMakeLists.txt:14 (target_compile_options):
  Loop step 2

    $<TARGET_GENEX_EVAL:foo,$<TARGET_PROPERTY:foo,a>>



CMake Error:
  Loop step 3

    $<GENEX_EVAL:$<TARGET_PROPERTY:c>>

Probably if I update cmake on Windows I get crash as well.

Am I doing something wrong or this is cmake bug?

UPD:

I believe that problem places are assert in TargetPropertyNode::Evaluate and and if in cmGeneratorExpressionDAGChecker::CheckGraph(). If I remove them, everything works as expected.