np.median and np.random.random() causing compilation errors

[radkoff]

Hi, thanks for this project. I've ran into some strange compilation errors using a certain combination of numpy calls.

This input file:

import numpy as np

def bar():
    rand = np.random.random((10, 20))
    return [1,2,3]

#pythran export foo()
def foo():
    return np.median(bar())

Causes the following compilation errors (output is from using -v)

/var/folders/l5/210k0yvw8xj04j001s6yhlr00000gq/T/tmpfp7w9ly4.cpp:42:24: error: no matching function for call to object of type '(anonymous namespace)::pythonic::numpy::functor::median'
      typedef decltype(std::declval<__type0>()(std::declval<__type2>())) __type3;
                       ^~~~~~~~~~~~~~~~~~~~~~~
/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran/pythonic/include/numpy/median.hpp:31:3: note: candidate template ignored: substitution failure [with Types = <(anonymous namespace)::pythonic::types::list<long>>]: no matching function for call to 'median'
  DEFINE_FUNCTOR(pythonic::numpy, median);
  ^              ~~~~~~~~
/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran/pythonic/include/utils/functor.hpp:28:31: note: expanded from macro 'DEFINE_FUNCTOR'
#define DEFINE_FUNCTOR(ns, f) DEFINE_FUNCTOR_2(f, ns::f)
                              ^                   ~~
/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran/pythonic/include/utils/functor.hpp:14:12: note: expanded from macro 'DEFINE_FUNCTOR_2'
      auto operator()(Types && ... types) const                                \
           ^
/var/folders/l5/210k0yvw8xj04j001s6yhlr00000gq/T/tmpfp7w9ly4.cpp:62:12: error: no matching function for call to object of type 'pythonic::numpy::functor::median'
    return pythonic::numpy::functor::median{}(bar()());
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran/pythonic/include/numpy/median.hpp:31:3: note: candidate template ignored: substitution failure [with Types = <(anonymous namespace)::pythonic::types::list<long>>]: no matching function for call to 'median'
  DEFINE_FUNCTOR(pythonic::numpy, median);
  ^              ~~~~~~~~
/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran/pythonic/include/utils/functor.hpp:28:31: note: expanded from macro 'DEFINE_FUNCTOR'
#define DEFINE_FUNCTOR(ns, f) DEFINE_FUNCTOR_2(f, ns::f)
                              ^                   ~~
/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran/pythonic/include/utils/functor.hpp:14:12: note: expanded from macro 'DEFINE_FUNCTOR_2'
      auto operator()(Types && ... types) const                                \
           ^
1 warning and 2 errors generated.
WARNING: Compilation error, trying hard to find its origin...
WARNING: Nope, I'm going to flood you with C++ errors!
CRITICAL: Cover me Jack. Jack? Jaaaaack!!!!
E: error: Command "clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/evan/miniforge3/envs/project/include -arch arm64 -I/Users/evan/miniforge3/envs/project/include -fPIC -O2 -isystem /Users/evan/miniforge3/envs/project/include -arch arm64 -DENABLE_PYTHON_MODULE -D__PYTHRAN__=3 -DPYTHRAN_BLAS_OPENBLAS -I/usr/local/opt/openblas/include -I/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/pythran -I/Users/evan/miniforge3/envs/project/lib/python3.9/site-packages/numpy/core/include -I/Users/evan/miniforge3/envs/project/include/python3.9 -c /var/folders/l5/210k0yvw8xj04j001s6yhlr00000gq/T/tmpfp7w9ly4.cpp -o /var/folders/l5/210k0yvw8xj04j001s6yhlr00000gq/T/tmpgfjieuw6/var/folders/l5/210k0yvw8xj04j001s6yhlr00000gq/T/tmpfp7w9ly4.o -std=c++11 -fno-math-errno -Wno-unused-function" failed with exit status 1

Interestingly removing the np.random.random((10, 20)) makes the problem go away, and changing from np.median to np.mean also makes it work.

I'm using pythran==0.12.1 with Python 3.9.13 on an M1 mac.

[serge-sans-paille]

Thanks for reporting! #2083 should do the trick.

[radkoff]

Thanks for the quick fix, that worked!