[BUG]: mojo crash: Assertion `!failed && "we know this should always work because we lexed it"' failed.

[junweizeng]

Bug description

mojo crashes on the following code (i.e. test.mojo).

0__init__

Steps to reproduce

$ mojo build test.mojo
/path/to/test.mojo:1:1: error: TODO: expressions are not yet supported at the file scope level
0__init__
^
mojo: /__w/modular/modular/KGEN/lib/MojoParser/Lexer.cpp:842: static llvm::APInt M::KGEN::LIT::Lexer::getIntegerLiteralValue(llvm::StringRef): Assertion `!failed && "we know this should always work because we lexed it"' failed.
Please submit a bug report to https://github.com/modularml/mojo/issues and include the crash backtrace along with all the relevant source codes.
Stack dump:
0.      Program arguments: mojo build test.mojo
1.      Crash resolving decl body at loc("/path/to/test.mojo":1:1)
    >> 0__init__
       ^..<     
2.      Crash parsing statement at loc("/path/to/test.mojo":1:1)
    >> 0__init__
       ^..<     
 #0 0x0000562981aace47 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x62ae47)
 #1 0x0000562981aaaa1e (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x628a1e)
 #2 0x0000562981aad51f (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x62b51f)
 #3 0x00007f205c275520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f205c2c9a7c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f205c2c9a7c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f205c2c9a7c pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f205c275476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f205c25b7f3 abort ./stdlib/abort.c:81:7
 #9 0x00007f205c25b71b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x00007f205c26ce96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#11 0x0000562981e9e8d7 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa1c8d7)
#12 0x0000562981f02e01 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa80e01)
#13 0x0000562981efd709 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa7b709)
#14 0x0000562981f331b0 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xab11b0)
#15 0x0000562981f2d558 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xaab558)
#16 0x0000562981f2d406 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xaab406)
#17 0x0000562981ed1443 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa4f443)
#18 0x0000562981ee883e (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa6683e)
#19 0x0000562981ee8fc8 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa66fc8)
#20 0x0000562981e96cfb (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa14cfb)
#21 0x0000562981e97059 (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0xa15059)
#22 0x0000562981a55e0f (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x5d3e0f)
#23 0x0000562981a5823b (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x5d623b)
#24 0x0000562981a52ddf (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x5d0ddf)
#25 0x0000562981a5165d (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x5cf65d)
#26 0x00007f205c25cd90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#27 0x00007f205c25ce40 call_init ./csu/../csu/libc-start.c:128:20
#28 0x00007f205c25ce40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#29 0x0000562981a50fae (/home/jwzeng/.modular/pkg/packages.modular.com_mojo/bin/mojo+0x5cefae)
Aborted

System information

- Ubuntu 22.04 LTS
- mojo 24.1.0 (55ec12d6)
- modular 0.5.1 (1b608e3d)

[Brian-M-J]

we know this should always work

Welp 😆

[akirchhoff-modular]

Even shorter crashing code: 0__

[ematejska]

@Mogball Dup of global stuff or no?

[Mogball]

no