# Buggy code
def get_item_pointer2(builder, data, shape, strides, layout, inds, wraparound=False):
    if wraparound:
        # Wraparound
        indices = []
        for ind, dimlen in zip(inds, shape):
            negative = builder.icmp_signed("<", ind, ind.type(0))
            wrapped = builder.add(dimlen, ind)
            selected = builder.select(negative, wrapped, ind)
            indices.append(selected)
    else:
        indices = inds
    if not indices:
        # Indexing with empty tuple
        return builder.gep(data, [int32_t(0)])
    intp = indices[0].type
    # Indexing code
    if layout in "CF":
        steps = []
        # Compute steps for each dimension
        if layout == "C":
            # C contiguous
            for i in range(len(shape)):
                last = intp(1)
                for j in shape[i + 1 :]:
                    last = builder.mul(last, j)
                steps.append(last)
        elif layout == "F":
            # F contiguous
            for i in range(len(shape)):
                last = intp(1)
                for j in shape[:i]:
                    last = builder.mul(last, j)
                steps.append(last)
        else:
            raise Exception("unreachable")

        # Compute index
        loc = intp(0)
        for i, s in zip(indices, steps):
            tmp = builder.mul(i, s)
            loc = builder.add(loc, tmp)
        ptr = builder.gep(data, [loc])
        return ptr
    else:
        # Any layout
        dimoffs = [builder.mul(s, i) for s, i in zip(strides, indices)]
        offset = functools.reduce(builder.add, dimoffs)
        return pointer_add(builder, data, offset)


# 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 get_item_pointer2(
    context,
    builder,
    data,
    shape,
    strides,
    layout,
    inds,
    wraparound=False,
    boundscheck=False,
):
    # Set boundscheck=True for any pointer access that should be
    # boundschecked. do_boundscheck() will handle enabling or disabling the
    # actual boundschecking based on the user config.
    if wraparound:
        # Wraparound
        indices = []
        for ind, dimlen in zip(inds, shape):
            negative = builder.icmp_signed("<", ind, ind.type(0))
            wrapped = builder.add(dimlen, ind)
            selected = builder.select(negative, wrapped, ind)
            indices.append(selected)
    else:
        indices = inds
    if boundscheck:
        for axis, (ind, dimlen) in enumerate(zip(indices, shape)):
            do_boundscheck(context, builder, ind, dimlen, axis)

    if not indices:
        # Indexing with empty tuple
        return builder.gep(data, [int32_t(0)])
    intp = indices[0].type
    # Indexing code
    if layout in "CF":
        steps = []
        # Compute steps for each dimension
        if layout == "C":
            # C contiguous
            for i in range(len(shape)):
                last = intp(1)
                for j in shape[i + 1 :]:
                    last = builder.mul(last, j)
                steps.append(last)
        elif layout == "F":
            # F contiguous
            for i in range(len(shape)):
                last = intp(1)
                for j in shape[:i]:
                    last = builder.mul(last, j)
                steps.append(last)
        else:
            raise Exception("unreachable")

        # Compute index
        loc = intp(0)
        for i, s in zip(indices, steps):
            tmp = builder.mul(i, s)
            loc = builder.add(loc, tmp)
        ptr = builder.gep(data, [loc])
        return ptr
    else:
        # Any layout
        dimoffs = [builder.mul(s, i) for s, i in zip(strides, indices)]
        offset = functools.reduce(builder.add, dimoffs)
        return pointer_add(builder, data, offset)