V panic when passing undeclared argument to fn

[gechandesu]

V doctor:

V full version: V 0.4.8 5ec9bb5.393e4ea
OS: linux, Linux version 6.6.8-arch1-1 (linux@archlinux) (gcc (GCC) 13.2.1 20230801, GNU ld (GNU Binutils) 2.41.0) #1 SMP PREEMPT_DYNAMIC Thu, 21 Dec 2023 19:01:01 +0000
Processor: 16 cpus, 64bit, little endian, 12th Gen Intel(R) Core(TM) i5-1240P

getwd: /home/ge/Code/v/netaddr/issues
vexe: /home/ge/.vlang/v
vexe mtime: 2024-11-23 13:05:19

vroot: OK, value: /home/ge/.vlang
VMODULES: OK, value: /home/ge/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.46.1
Git vroot status: weekly.2024.47-20-g393e4ea8
.git/config present: true

CC version: cc (GCC) 14.2.1 20240910
emcc version: N/A
thirdparty/tcc status: thirdparty-linux-amd64 0134e9b9

What did you do?
./v -g -o vdbg cmd/v && ./vdbg missing_arg_decl.v

module main

// note missing `input` argument in fn signature
fn foo() !string {
	// without next error does not occurs
	a, b := input.split_once('%') or { '', 'empty' }
	if b == '' {
		return error('')
	}
	return a
}

fn main() {
	res := foo('fe80::1234%ne0') or {
		eprintln(err)
		exit(1)
	}
	println(res)
}

What did you expect to see?

V errors undefined ident: input and expected 0 arguments, but got 1

What did you see instead?

================ V panic ================
   module: v.ast
 function: default_table_panic_handler()
  message: table.sym: invalid type (typ=ast.Type(0x0 = 0) idx=0). Compiler bug. This should never happen. Please report the bug using `v bug file.v`.

     file: /home/ge/.vlang/vlib/v/ast/table.v:119
   v hash: 393e4ea
=========================================
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/builtin/builtin.c.v:87: at panic_debug: Backtrace
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/ast/table.v:119: by v__ast__default_table_panic_handler
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/ast/table.v:125: by v__ast__Table_panic
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/ast/table.v:745: by v__ast__Table_sym
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/ast/table.v:778: by v__ast__Table_unalias_num_type
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/check_types.v:403: by v__checker__Checker_check_basic
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/check_types.v:175: by v__checker__Checker_check_types
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:1496: by v__checker__Checker_check_or_last_stmt
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:1382: by v__checker__Checker_check_or_expr
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/fn.v:748: by v__checker__Checker_call_expr
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:2907: by v__checker__Checker_expr
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/assign.v:34: by v__checker__Checker_assign_stmt
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:2161: by v__checker__Checker_stmt
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:2766: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:2736: by v__checker__Checker_stmts
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/fn.v:517: by v__checker__Checker_fn_decl
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:2248: by v__checker__Checker_stmt
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:274: by v__checker__Checker_check
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/checker/checker.v:342: by v__checker__Checker_check_files
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/builder/builder.v:131: by v__builder__Builder_middle_stages
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/builder/builder.v:158: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/builder/cbuilder/cbuilder.v:71: by v__builder__cbuilder__gen_c
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/builder/cbuilder/cbuilder.v:59: by v__builder__cbuilder__build_c
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/builder/cbuilder/cbuilder.v:49: by v__builder__cbuilder__compile_c
/tmp/v_1000/../../../../../../home/ge/.vlang/vlib/v/builder/rebuilding.v:324: by v__builder__Builder_rebuild

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_{Huly®: V_0.6-21391}