Compiler panic when calling map.keys() or map.values() in a generic function

[lv37]

Describe the bug

Trying to compile

module main

fn generic[T](a T) {
	a.keys() // same error with a.values()
}

fn main() {
	a := { 'aa': 11 }
	generic(a)
}

gives

V panic: as cast: cannot cast `unknown` to `v.ast.Map`

Reproduction Steps

Try compiling the above code

Expected Behavior

Compile successfully

Current Behavior

V panic: as cast: cannot cast `unknown` to `v.ast.Map`
v hash: be51143
/tmp/v_1002/v2.5487961839979887618.tmp.c:21153: at _v_panic: Backtrace
/tmp/v_1002/v2.5487961839979887618.tmp.c:21638: by __as_cast
/tmp/v_1002/v2.5487961839979887618.tmp.c:30537: by v__checker__Checker_map_builtin_method_call
/tmp/v_1002/v2.5487961839979887618.tmp.c:29595: by v__checker__Checker_method_call
/tmp/v_1002/v2.5487961839979887618.tmp.c:28427: by v__checker__Checker_call_expr
/tmp/v_1002/v2.5487961839979887618.tmp.c:21637: by v__checker__Checker_expr
/tmp/v_1002/v2.5487961839979887618.tmp.c:20906: by v__checker__Checker_stmt
/tmp/v_1002/v2.5487961839979887618.tmp.c:21426: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1002/v2.5487961839979887618.tmp.c:21402: by v__checker__Checker_stmts
/tmp/v_1002/v2.5487961839979887618.tmp.c:28262: by v__checker__Checker_fn_decl
/tmp/v_1002/v2.5487961839979887618.tmp.c:30346: by v__checker__Checker_post_process_generic_fns
/tmp/v_1002/v2.5487961839979887618.tmp.c:19163: by v__checker__Checker_check_files
/tmp/v_1002/v2.5487961839979887618.tmp.c:47889: by v__builder__Builder_middle_stages
/tmp/v_1002/v2.5487961839979887618.tmp.c:47923: by v__builder__Builder_front_and_middle_stages
/tmp/v_1002/v2.5487961839979887618.tmp.c:50370: by v__builder__cbuilder__gen_c
/tmp/v_1002/v2.5487961839979887618.tmp.c:50353: by v__builder__cbuilder__build_c
/tmp/v_1002/v2.5487961839979887618.tmp.c:50343: by v__builder__cbuilder__compile_c
/tmp/v_1002/v2.5487961839979887618.tmp.c:50249: by v__builder__Builder_rebuild
/tmp/v_1002/v2.5487961839979887618.tmp.c:49354: by v__builder__compile
/tmp/v_1002/v2.5487961839979887618.tmp.c:50684: by main__rebuild
/tmp/v_1002/v2.5487961839979887618.tmp.c:50573: by main__main
/tmp/v_1002/v2.5487961839979887618.tmp.c:51349: by main

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.3 be51143

Environment details (OS name and version, etc.)

V full version: V 0.4.3 b347f54.be51143
OS: linux, Linux version 6.5.12-300.fc39.x86_64 (mockbuild@cda4963b6857459f9d1b40ea59f8a44a) (gcc (GCC) 13.2.1 20231011 (Red Hat 13.2.1-4), GNU ld version 2.40-13.fc39) #1 SMP PREEMPT_DYNAMIC Mon Nov 20 22:44:24 UTC 2023
Processor: 4 cpus, 64bit, little endian, Intel(R) Core(TM) i5-4310U CPU @ 2.00GHz

getwd: /home/user/Projects/v-testing/webview/utils
vexe: /home/user/.local/lib/v/v
vexe mtime: 2023-12-01 18:36:54

vroot: OK, value: /home/user/.local/lib/v
VMODULES: OK, value: /home/user/.vmodules
VTMP: OK, value: /tmp/v_1002

Git version: git version 2.43.0
Git vroot status: weekly.2023.48-28-gbe51143a
.git/config present: true

CC version: cc (GCC) 13.2.1 20231011 (Red Hat 13.2.1-4)
thirdparty/tcc status: thirdparty-linux-amd64 12f392c3

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