# Buggy code
def _runPass(self, index, pss, internal_state):
    mutated = False

    def check(func, compiler_state):
        mangled = func(compiler_state)
        if mangled not in (True, False):
            msg = (
                "CompilerPass implementations should return True/False. "
                "CompilerPass with name '%s' did not."
            )
            raise ValueError(msg % pss.name())
        return mangled

    # wire in the analysis info so it's accessible
    pss.analysis = self._analysis

    with SimpleTimer() as init_time:
        mutated |= check(pss.run_initialization, internal_state)
    with SimpleTimer() as pass_time:
        mutated |= check(pss.run_pass, internal_state)
    with SimpleTimer() as finalize_time:
        mutated |= check(pss.run_finalizer, internal_state)

    if self._ENFORCING:
        # TODO: Add in self consistency enforcement for
        # `func_ir._definitions` etc
        if _pass_registry.get(pss.__class__).mutates_CFG:
            if mutated:  # block level changes, rebuild all
                PostProcessor(internal_state.func_ir).run()
            else:  # CFG level changes rebuild CFG
                internal_state.func_ir.blocks = transforms.canonicalize_cfg(
                    internal_state.func_ir.blocks
                )

    # inject runtimes
    pt = pass_timings(init_time.elapsed, pass_time.elapsed, finalize_time.elapsed)
    self.exec_times["%s_%s" % (index, pss.name())] = pt

    # debug print after this pass?
    if pss.name() in self._print_after:
        fid = internal_state.func_id
        args = (fid.modname, fid.func_qualname, self.pipeline_name, pss.name())
        print(("%s.%s: %s: %s" % args).center(80, "-"))
        internal_state.func_ir.dump()


# 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 _runPass(self, index, pss, internal_state):
    mutated = False

    def check(func, compiler_state):
        mangled = func(compiler_state)
        if mangled not in (True, False):
            msg = (
                "CompilerPass implementations should return True/False. "
                "CompilerPass with name '%s' did not."
            )
            raise ValueError(msg % pss.name())
        return mangled

    def debug_print(pass_name, print_condition, printable_condition):
        if pass_name in print_condition:
            fid = internal_state.func_id
            args = (
                fid.modname,
                fid.func_qualname,
                self.pipeline_name,
                printable_condition,
                pass_name,
            )
            print(("%s.%s: %s: %s %s" % args).center(120, "-"))
            if internal_state.func_ir is not None:
                internal_state.func_ir.dump()
            else:
                print("func_ir is None")

    # debug print before this pass?
    debug_print(pss.name(), self._print_before + self._print_wrap, "BEFORE")

    # wire in the analysis info so it's accessible
    pss.analysis = self._analysis

    with SimpleTimer() as init_time:
        mutated |= check(pss.run_initialization, internal_state)
    with SimpleTimer() as pass_time:
        mutated |= check(pss.run_pass, internal_state)
    with SimpleTimer() as finalize_time:
        mutated |= check(pss.run_finalizer, internal_state)

    if self._ENFORCING:
        # TODO: Add in self consistency enforcement for
        # `func_ir._definitions` etc
        if _pass_registry.get(pss.__class__).mutates_CFG:
            if mutated:  # block level changes, rebuild all
                PostProcessor(internal_state.func_ir).run()
            else:  # CFG level changes rebuild CFG
                internal_state.func_ir.blocks = transforms.canonicalize_cfg(
                    internal_state.func_ir.blocks
                )

    # inject runtimes
    pt = pass_timings(init_time.elapsed, pass_time.elapsed, finalize_time.elapsed)
    self.exec_times["%s_%s" % (index, pss.name())] = pt

    # debug print after this pass?
    debug_print(pss.name(), self._print_after + self._print_wrap, "AFTER")