# Buggy code
def typeof_expr(self, inst, target, expr):
    if expr.op == "call":
        if isinstance(expr.func, ir.Intrinsic):
            sig = expr.func.type
            self.add_type(target.name, sig.return_type, loc=inst.loc)
            self.add_calltype(expr, sig)
        else:
            self.typeof_call(inst, target, expr)
    elif expr.op in ("getiter", "iternext"):
        self.typeof_intrinsic_call(inst, target, expr.op, expr.value)
    elif expr.op == "exhaust_iter":
        constraint = ExhaustIterConstraint(
            target.name, count=expr.count, iterator=expr.value, loc=expr.loc
        )
        self.constraints.append(constraint)
    elif expr.op == "pair_first":
        constraint = PairFirstConstraint(target.name, pair=expr.value, loc=expr.loc)
        self.constraints.append(constraint)
    elif expr.op == "pair_second":
        constraint = PairSecondConstraint(target.name, pair=expr.value, loc=expr.loc)
        self.constraints.append(constraint)
    elif expr.op == "binop":
        self.typeof_intrinsic_call(inst, target, expr.fn, expr.lhs, expr.rhs)
    elif expr.op == "inplace_binop":
        self.typeof_intrinsic_call(inst, target, expr.fn, expr.lhs, expr.rhs)
    elif expr.op == "unary":
        self.typeof_intrinsic_call(inst, target, expr.fn, expr.value)
    elif expr.op == "static_getitem":
        constraint = StaticGetItemConstraint(
            target.name,
            value=expr.value,
            index=expr.index,
            index_var=expr.index_var,
            loc=expr.loc,
        )
        self.constraints.append(constraint)
        self.calls.append((inst.value, constraint))
    elif expr.op == "getitem":
        self.typeof_intrinsic_call(
            inst,
            target,
            operator.getitem,
            expr.value,
            expr.index,
        )
    elif expr.op == "getattr":
        constraint = GetAttrConstraint(
            target.name, attr=expr.attr, value=expr.value, loc=inst.loc, inst=inst
        )
        self.constraints.append(constraint)
    elif expr.op == "build_tuple":
        constraint = BuildTupleConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "build_list":
        constraint = BuildListConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "build_set":
        constraint = BuildSetConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "build_map":
        constraint = BuildMapConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "cast":
        self.constraints.append(
            Propagate(dst=target.name, src=expr.value.name, loc=inst.loc)
        )
    elif expr.op == "make_function":
        self.lock_type(
            target.name,
            types.MakeFunctionLiteral(expr),
            loc=inst.loc,
            literal_value=expr,
        )
    else:
        msg = "Unsupported op-code encountered: %s" % expr
        raise UnsupportedError(msg, loc=inst.loc)


# 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 typeof_expr(self, inst, target, expr):
    if expr.op == "call":
        if isinstance(expr.func, ir.Intrinsic):
            sig = expr.func.type
            self.add_type(target.name, sig.return_type, loc=inst.loc)
            self.add_calltype(expr, sig)
        else:
            self.typeof_call(inst, target, expr)
    elif expr.op in ("getiter", "iternext"):
        self.typeof_intrinsic_call(inst, target, expr.op, expr.value)
    elif expr.op == "exhaust_iter":
        constraint = ExhaustIterConstraint(
            target.name, count=expr.count, iterator=expr.value, loc=expr.loc
        )
        self.constraints.append(constraint)
    elif expr.op == "pair_first":
        constraint = PairFirstConstraint(target.name, pair=expr.value, loc=expr.loc)
        self.constraints.append(constraint)
    elif expr.op == "pair_second":
        constraint = PairSecondConstraint(target.name, pair=expr.value, loc=expr.loc)
        self.constraints.append(constraint)
    elif expr.op == "binop":
        self.typeof_intrinsic_call(inst, target, expr.fn, expr.lhs, expr.rhs)
    elif expr.op == "inplace_binop":
        self.typeof_intrinsic_call(inst, target, expr.fn, expr.lhs, expr.rhs)
    elif expr.op == "unary":
        self.typeof_intrinsic_call(inst, target, expr.fn, expr.value)
    elif expr.op == "static_getitem":
        constraint = StaticGetItemConstraint(
            target.name,
            value=expr.value,
            index=expr.index,
            index_var=expr.index_var,
            loc=expr.loc,
        )
        self.constraints.append(constraint)
        self.calls.append((inst.value, constraint))
    elif expr.op == "getitem":
        self.typeof_intrinsic_call(
            inst,
            target,
            operator.getitem,
            expr.value,
            expr.index,
        )
    elif expr.op == "typed_getitem":
        constraint = TypedGetItemConstraint(
            target.name,
            value=expr.value,
            dtype=expr.dtype,
            index=expr.index,
            loc=expr.loc,
        )
        self.constraints.append(constraint)
        self.calls.append((inst.value, constraint))

    elif expr.op == "getattr":
        constraint = GetAttrConstraint(
            target.name, attr=expr.attr, value=expr.value, loc=inst.loc, inst=inst
        )
        self.constraints.append(constraint)
    elif expr.op == "build_tuple":
        constraint = BuildTupleConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "build_list":
        constraint = BuildListConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "build_set":
        constraint = BuildSetConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "build_map":
        constraint = BuildMapConstraint(target.name, items=expr.items, loc=inst.loc)
        self.constraints.append(constraint)
    elif expr.op == "cast":
        self.constraints.append(
            Propagate(dst=target.name, src=expr.value.name, loc=inst.loc)
        )
    elif expr.op == "make_function":
        self.lock_type(
            target.name,
            types.MakeFunctionLiteral(expr),
            loc=inst.loc,
            literal_value=expr,
        )
    else:
        msg = "Unsupported op-code encountered: %s" % expr
        raise UnsupportedError(msg, loc=inst.loc)