$ cat examples/expr2.py
from lpython import i32
def return_empty_list_of_integers() -> list[i32]:
return []
def main0():
x: list[i32] = return_empty_list_of_integers()
print(len(x))
assert len(x) == 0
main0()
$ python examples/expr2.py
0
$ lpython examples/expr2.py
Internal Compiler Error: Unhandled exception
Traceback (most recent call last):
File "/Users/ubaid/Desktop/OpenSource/lpython/src/bin/lpython.cpp", line 1822
err = compile_python_to_object_file(arg_file, tmp_o, runtime_library_dir,
File "/Users/ubaid/Desktop/OpenSource/lpython/src/bin/lpython.cpp", line 783
r1 = LCompilers::LPython::python_ast_to_asr(al, lm, *ast, diagnostics, compiler_options,
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 7274
#endif
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 7227
{
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 4405
visit_stmt(*x.m_body[i]);
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/python_ast.h", line 1883
void visit_stmt(const stmt_t &b) { visit_stmt_t(b, self()); }
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/python_ast.h", line 1751
case stmtType::FunctionDef: { v.visit_FunctionDef((const FunctionDef_t &)x); return; }
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 4514
handle_fn(x, *f);
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 4494
transform_stmts(body, x.n_body, x.m_body);
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 4365
this->visit_stmt(*m_body[i]);
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/python_ast.h", line 1883
void visit_stmt(const stmt_t &b) { visit_stmt_t(b, self()); }
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/python_ast.h", line 1753
case stmtType::ClassDef: { v.visit_ClassDef((const ClassDef_t &)x); return; }
File "/Users/ubaid/Desktop/OpenSource/lpython/src/lpython/semantics/python_ast_to_asr.cpp", line 6033
ASR::expr_t *target = ASRUtils::EXPR(return_var_ref);
File "/Users/ubaid/Desktop/OpenSource/lpython/src/libasr/asr_utils.h", line 34
return ASR::down_cast<ASR::expr_t>(f);
File "/Users/ubaid/Desktop/OpenSource/lpython/src/libasr/asr.h", line 40
LCOMPILERS_ASSERT(f != nullptr);
AssertFailed: f != nullptr