[BUG] Parser crashes when struct has parameterized and slice __getitem__ overloads

[bgreni]

Bug description

If a struct has both a simple parameterized __getitem__ implementation, as well as one that takes a slice. Attempting to use the slice operator will result in a parser crash.

Blocking completion of #2337 since List and String are both sliceable.

Steps to reproduce

struct Foo:
    var l: List[Int]
    fn __init__(inout self):
        self.l = List[Int](1,2,3)

    fn __getitem__[T: Intable](self, i: T) -> Int:
        return self.l[int(i)]
        
    fn __getitem__(self, s: Slice) -> List[Int]:
        return self.l[s]

fn main():
    var t = Foo()
    var x = t[1:]

Stack dump:
0.      Program arguments: mojo run playground.mojo
1.      Crash resolving decl body at loc("/Users/bgreni/Coding/mojo/playground.mojo":16:4)
    >> fn main():
          ^......
    >>     var t = Foo()
    >>     var x = t[1:]
       .................<
2.      Crash parsing statement at loc("/Users/bgreni/Coding/mojo/playground.mojo":18:5)
    >>     var x = t[1:]
           ^............<
 #0 0x000000010416d384 llvm_strlcpy (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1000c5384)
 #1 0x000000010416b670 llvm_strlcpy (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1000c3670)
 #2 0x000000010416da70 llvm_strlcpy (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1000c5a70)
 #3 0x00000001878cfa24 (/usr/lib/system/libsystem_platform.dylib+0x180467a24)
 #4 0x0000000104425480 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10037d480)
 #5 0x0000000104458ac4 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003b0ac4)
 #6 0x0000000104488460 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003e0460)
 #7 0x0000000104487c70 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003dfc70)
 #8 0x0000000104422f14 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10037af14)
 #9 0x0000000104422104 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10037a104)
#10 0x0000000104423360 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10037b360)
#11 0x0000000104483b34 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003dbb34)
#12 0x0000000104423f80 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10037bf80)
#13 0x0000000104423e34 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10037be34)
#14 0x00000001044662a4 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003be2a4)
#15 0x000000010446a2fc __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003c22fc)
#16 0x000000010445c0a0 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003b40a0)
#17 0x000000010449959c __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003f159c)
#18 0x0000000104491b44 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003e9b44)
#19 0x0000000104491944 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003e9944)
#20 0x0000000104437c54 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10038fc54)
#21 0x0000000104445b54 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10039db54)
#22 0x0000000104445f94 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10039df94)
#23 0x000000010444e27c __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003a627c)
#24 0x000000010444e4a4 __jit_debug_register_code (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x1003a64a4)
#25 0x00000001040b4680 _mh_execute_header (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10000c680)
#26 0x00000001040c5c54 _mh_execute_header (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10001dc54)
#27 0x00000001040af73c _mh_execute_header (/Users/bgreni/.modular/pkg/packages.modular.com_nightly_mojo/bin/mojo+0x10000773c)
#28 0x00000001875250e0 
mojo crashed!
Please file a bug report.
[50819:1801860:20240422,171805.990832:WARNING crash_report_exception_handler.cc:257] UniversalExceptionRaise: (os/kern) failure (5)

System information

OS: Sonoma 14.1 Apple M3
mojo 2024.4.1618 (37a3e965)
modular 0.7.0 (487c2f88)

[bgreni]

This appears to have been resolved so closing this issue

tested with: mojo 2024.5.622 (d9dc4c21)