v checker panic if incorrect number of parameters supplied to method

[dy-tea]

Describe the bug

Checker panics when running included code snippet. Found while writing test cases for #25178. Haven't looked too deeply but it's probably somewhat related to that issue.

Reproduction Steps

fn main() {
	mut m := map[string]int
	m['test'] = 10
	map_delete := m.delete()
}

Expected Behavior

Map delete returns void so maybe we need an error here?

Current Behavior

V panic: array.get: index out of range (i,a.len):0, 0
v hash: cb2756e
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:19677: at _v_panic: Backtrace
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:19725: by panic_n2
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:19231: by array_get
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:644: by v__checker__Checker_map_builtin_method_call
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:65026: by v__checker__Checker_method_call
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:63608: by v__checker__Checker_call_expr
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:54528: by v__checker__Checker_expr
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:49130: by v__checker__Checker_assign_stmt
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:53661: by v__checker__Checker_stmt
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:54285: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:54262: by v__checker__Checker_stmts
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:63389: by v__checker__Checker_fn_decl
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:53709: by v__checker__Checker_stmt
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:51574: by v__checker__Checker_check
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:51635: by v__checker__Checker_check_files
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:53318: by v__builder__Builder_middle_stages
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:53359: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:55889: by v__builder__cbuilder__gen_c
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:55861: by v__builder__cbuilder__build_c
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:55852: by v__builder__cbuilder__compile_c
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:55769: by v__builder__Builder_rebuild
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:54921: by v__builder__compile
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:56290: by main__rebuild
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:56203: by main__main
/tmp/v_1000/v2.01K3Y9KY3GYMXJ5EQMTV5QMH44.tmp.c:57111: by main

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.11 cb2756e

Environment details (OS name and version, etc.)

V full version	V 0.4.11 2ac3478.cb2756e
OS	linux, "CachyOS"
Processor	16 cpus, 64bit, little endian, AMD Ryzen 7 5700G with Radeon Graphics
Memory	6.18GB/13.55GB
V executable	/home/dylan/Repos/v/v
V last modified time	2025-08-30 20:10:07
V home dir	OK, value: /home/dylan/Repos/v
VMODULES	OK, value: /home/dylan/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /home/dylan
Git version	git version 2.51.0
V git status	weekly.2025.35-22-gcb2756e3-dirty
.git/config present	true
cc version	cc (GCC) 15.2.1 20250813
gcc version	gcc (GCC) 15.2.1 20250813
clang version	clang version 20.1.8
tcc version	tcc version 0.9.28rc 2025-02-13 HEAD@f8bd136d (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 696c1d84
emcc version	N/A
glibc version	ldd (GNU libc) 2.42

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[huly-for-github]

Connected to Huly®: V_0.6-24409

[JalonSolov]

This error is because the delete method on maps takes one parameter - the key to delete. If the code is corrected to map_delete := m.delete('test'), you get these messages:

x.v:3:1: warning: unused variable: `map_delete`
    1 | mut m := map[string]int
    2 | m['test'] = 10
    3 | map_delete := m.delete('test')
      | ~~~~~~~~~~
x.v:3:12: error: assignment mismatch: 1 variable but `delete()` returns 0 values
    1 | mut m := map[string]int
    2 | m['test'] = 10
    3 | map_delete := m.delete('test')
      |            ~~

[Delta456]

This should be a checker error.

[Delta456]

The same error can be shown by

fn main() {
	mut m := map[string]int{}
	m['test'] = 10
	m.delete()
}