# Buggy code
def convert_code_obj_to_function(code_obj, caller_ir):
    """
    Converts a code object from a `make_function.code` attr in the IR into a
    python function, caller_ir is the FunctionIR of the caller and is used for
    the resolution of freevars.
    """
    fcode = code_obj.code
    nfree = len(fcode.co_freevars)

    # try and resolve freevars if they are consts in the caller's IR
    # these can be baked into the new function
    freevars = []
    for x in fcode.co_freevars:
        # not using guard here to differentiate between multiple definition and
        # non-const variable
        try:
            freevar_def = caller_ir.get_definition(x)
        except KeyError:
            msg = (
                "Cannot capture a constant value for variable '%s' as there "
                "are multiple definitions present." % x
            )
            raise TypingError(msg, loc=code_obj.loc)
        if isinstance(freevar_def, ir.Const):
            freevars.append(freevar_def.value)
        else:
            msg = (
                "Cannot capture the non-constant value associated with "
                "variable '%s' in a function that will escape." % x
            )
            raise TypingError(msg, loc=code_obj.loc)

    func_env = "\n".join(["  c_%d = %s" % (i, x) for i, x in enumerate(freevars)])
    func_clo = ",".join(["c_%d" % i for i in range(nfree)])
    co_varnames = list(fcode.co_varnames)

    # This is horrible. The code object knows about the number of args present
    # it also knows the name of the args but these are bundled in with other
    # vars in `co_varnames`. The make_function IR node knows what the defaults
    # are, they are defined in the IR as consts. The following finds the total
    # number of args (args + kwargs with defaults), finds the default values
    # and infers the number of "kwargs with defaults" from this and then infers
    # the number of actual arguments from that.
    n_kwargs = 0
    n_allargs = fcode.co_argcount
    kwarg_defaults = caller_ir.get_definition(code_obj.defaults)
    if kwarg_defaults is not None:
        if isinstance(kwarg_defaults, tuple):
            d = [caller_ir.get_definition(x).value for x in kwarg_defaults]
            kwarg_defaults_tup = tuple(d)
        else:
            kwarg_defaults_tup = kwarg_defaults.value
        n_kwargs = len(kwarg_defaults_tup)
    nargs = n_allargs - n_kwargs

    func_arg = ",".join(["%s" % (co_varnames[i]) for i in range(nargs)])
    if n_kwargs:
        kw_const = [
            "%s = %s" % (co_varnames[i + nargs], kwarg_defaults_tup[i])
            for i in range(n_kwargs)
        ]
        func_arg += ", "
        func_arg += ", ".join(kw_const)

    # globals are the same as those in the caller
    glbls = caller_ir.func_id.func.__globals__

    # create the function and return it
    return _create_function_from_code_obj(fcode, func_env, func_arg, func_clo, glbls)


# Traceback (IndexError)
Traceback (most recent call last):
File "/home/ibutygin/miniconda3/envs/NUMBA_CUSTOM/lib/python3.7/site-packages/llvmlite/ir/instructions.py", line 619, in __init__
typ = typ.elements[i]
IndexError: tuple index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/ibutygin/src/numba/numba/numba/errors.py", line 717, in new_error_context
yield
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 260, in lower_block
self.lower_inst(inst)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 303, in lower_inst
val = self.lower_assign(ty, inst)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 467, in lower_assign
return self.lower_expr(ty, value)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 932, in lower_expr
res = self.lower_call(resty, expr)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 724, in lower_call
res = self._lower_call_normal(fnty, expr, signature)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 903, in _lower_call_normal
res = impl(self.builder, argvals, self.loc)
File "/home/ibutygin/src/numba/numba/numba/targets/base.py", line 1132, in __call__
res = self._imp(self._context, builder, self._sig, args, loc=loc)
File "/home/ibutygin/src/numba/numba/numba/targets/base.py", line 1157, in wrapper
return fn(*args, **kwargs)
File "/home/ibutygin/src/numba/numba/numba/typing/templates.py", line 778, in method_impl
return call(builder, args)
File "/home/ibutygin/src/numba/numba/numba/targets/base.py", line 1132, in __call__
res = self._imp(self._context, builder, self._sig, args, loc=loc)
File "/home/ibutygin/src/numba/numba/numba/targets/base.py", line 1157, in wrapper
return fn(*args, **kwargs)
File "/home/ibutygin/src/numba/numba/numba/targets/imputils.py", line 193, in imp
builder, func, fndesc.restype, fndesc.argtypes, args)
File "/home/ibutygin/src/numba/numba/numba/targets/callconv.py", line 477, in call_function
args = list(arginfo.as_arguments(builder, args))
File "/home/ibutygin/src/numba/numba/numba/datamodel/packer.py", line 100, in as_arguments
for dm, val in zip(self._dm_args, values)
File "/home/ibutygin/src/numba/numba/numba/datamodel/packer.py", line 100, in <listcomp>
for dm, val in zip(self._dm_args, values)
File "/home/ibutygin/src/numba/numba/numba/datamodel/models.py", line 447, in as_argument
v = builder.extract_value(value, [i])
File "/home/ibutygin/miniconda3/envs/NUMBA_CUSTOM/lib/python3.7/site-packages/llvmlite/ir/builder.py", line 927, in extract_value
instr = instructions.ExtractValue(self.block, agg, idx, name=name)
File "/home/ibutygin/miniconda3/envs/NUMBA_CUSTOM/lib/python3.7/site-packages/llvmlite/ir/instructions.py", line 622, in __init__
% (list(indices), agg.type))
TypeError: Can't index at [0] in {}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "test.py", line 73, in <module>
print(bar(Dummy()))
File "/home/ibutygin/src/numba/numba/numba/dispatcher.py", line 420, in _compile_for_args
raise e
File "/home/ibutygin/src/numba/numba/numba/dispatcher.py", line 353, in _compile_for_args
return self.compile(tuple(argtypes))
File "/home/ibutygin/src/numba/numba/numba/compiler_lock.py", line 32, in _acquire_compile_lock
return func(*args, **kwargs)
File "/home/ibutygin/src/numba/numba/numba/dispatcher.py", line 768, in compile
cres = self._compiler.compile(args, return_type)
File "/home/ibutygin/src/numba/numba/numba/dispatcher.py", line 77, in compile
status, retval = self._compile_cached(args, return_type)
File "/home/ibutygin/src/numba/numba/numba/dispatcher.py", line 91, in _compile_cached
retval = self._compile_core(args, return_type)
File "/home/ibutygin/src/numba/numba/numba/dispatcher.py", line 109, in _compile_core
pipeline_class=self.pipeline_class)
File "/home/ibutygin/src/numba/numba/numba/compiler.py", line 543, in compile_extra
return pipeline.compile_extra(func)
File "/home/ibutygin/src/numba/numba/numba/compiler.py", line 328, in compile_extra
return self._compile_bytecode()
File "/home/ibutygin/src/numba/numba/numba/compiler.py", line 389, in _compile_bytecode
return self._compile_core()
File "/home/ibutygin/src/numba/numba/numba/compiler.py", line 368, in _compile_core
raise e
File "/home/ibutygin/src/numba/numba/numba/compiler.py", line 359, in _compile_core
pm.run(self.state)
File "/home/ibutygin/src/numba/numba/numba/compiler_machinery.py", line 331, in run
raise patched_exception
File "/home/ibutygin/src/numba/numba/numba/compiler_machinery.py", line 322, in run
self._runPass(idx, pass_inst, state)
File "/home/ibutygin/src/numba/numba/numba/compiler_lock.py", line 32, in _acquire_compile_lock
return func(*args, **kwargs)
File "/home/ibutygin/src/numba/numba/numba/compiler_machinery.py", line 281, in _runPass
mutated |= check(pss.run_pass, internal_state)
File "/home/ibutygin/src/numba/numba/numba/compiler_machinery.py", line 268, in check
mangled = func(compiler_state)
File "/home/ibutygin/src/numba/numba/numba/typed_passes.py", line 391, in run_pass
NativeLowering().run_pass(state)
File "/home/ibutygin/src/numba/numba/numba/typed_passes.py", line 333, in run_pass
lower.lower()
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 179, in lower
self.lower_normal_function(self.fndesc)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 220, in lower_normal_function
entry_block_tail = self.lower_function_body()
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 245, in lower_function_body
self.lower_block(block)
File "/home/ibutygin/src/numba/numba/numba/lowering.py", line 260, in lower_block
self.lower_inst(inst)
File "/home/ibutygin/miniconda3/envs/NUMBA_CUSTOM/lib/python3.7/contextlib.py", line 130, in __exit__
self.gen.throw(type, value, traceback)
File "/home/ibutygin/src/numba/numba/numba/errors.py", line 725, in new_error_context
six.reraise(type(newerr), newerr, tb)
File "/home/ibutygin/src/numba/numba/numba/six.py", line 669, in reraise
raise value
numba.errors.LoweringError: Failed in nopython mode pipeline (step: nopython mode backend)
Can't index at [0] in {}

File "test.py", line 71:
def bar(obj):
return obj.inline_method(123,456)
^

[1] During: lowering "$10call_method.4 = call $4load_method.1($const6.2, $const8.3, func=$4load_method.1, args=[Var($const6.2, test.py:71), Var($const8.3, test.py:71)], kws=(), vararg=None)" at test.py (71)

# Fixed code
def convert_code_obj_to_function(code_obj, caller_ir):
    """
    Converts a code object from a `make_function.code` attr in the IR into a
    python function, caller_ir is the FunctionIR of the caller and is used for
    the resolution of freevars.
    """
    fcode = code_obj.code
    nfree = len(fcode.co_freevars)

    # try and resolve freevars if they are consts in the caller's IR
    # these can be baked into the new function
    freevars = []
    for x in fcode.co_freevars:
        # not using guard here to differentiate between multiple definition and
        # non-const variable
        try:
            freevar_def = caller_ir.get_definition(x)
        except KeyError:
            msg = (
                "Cannot capture a constant value for variable '%s' as there "
                "are multiple definitions present." % x
            )
            raise TypingError(msg, loc=code_obj.loc)
        if isinstance(freevar_def, ir.Const):
            freevars.append(freevar_def.value)
        else:
            msg = (
                "Cannot capture the non-constant value associated with "
                "variable '%s' in a function that will escape." % x
            )
            raise TypingError(msg, loc=code_obj.loc)

    func_env = "\n".join(["  c_%d = %s" % (i, x) for i, x in enumerate(freevars)])
    func_clo = ",".join(["c_%d" % i for i in range(nfree)])
    co_varnames = list(fcode.co_varnames)

    # This is horrible. The code object knows about the number of args present
    # it also knows the name of the args but these are bundled in with other
    # vars in `co_varnames`. The make_function IR node knows what the defaults
    # are, they are defined in the IR as consts. The following finds the total
    # number of args (args + kwargs with defaults), finds the default values
    # and infers the number of "kwargs with defaults" from this and then infers
    # the number of actual arguments from that.
    n_kwargs = 0
    n_allargs = fcode.co_argcount
    kwarg_defaults = caller_ir.get_definition(code_obj.defaults)
    if kwarg_defaults is not None:
        if isinstance(kwarg_defaults, tuple):
            d = [caller_ir.get_definition(x).value for x in kwarg_defaults]
            kwarg_defaults_tup = tuple(d)
        else:
            d = [caller_ir.get_definition(x).value for x in kwarg_defaults.items]
            kwarg_defaults_tup = tuple(d)
        n_kwargs = len(kwarg_defaults_tup)
    nargs = n_allargs - n_kwargs

    func_arg = ",".join(["%s" % (co_varnames[i]) for i in range(nargs)])
    if n_kwargs:
        kw_const = [
            "%s = %s" % (co_varnames[i + nargs], kwarg_defaults_tup[i])
            for i in range(n_kwargs)
        ]
        func_arg += ", "
        func_arg += ", ".join(kw_const)

    # globals are the same as those in the caller
    glbls = caller_ir.func_id.func.__globals__

    # create the function and return it
    return _create_function_from_code_obj(fcode, func_env, func_arg, func_clo, glbls)