V panics on `v -check .` in module with missing import in file

[gechandesu]

Describe the bug

V panics on running v -check . in the module with multiple files.

Reproduction Steps

Create the foo directory with files:

./
├── connection.v
├── read.v
└── v.mod

// connection.v
module foo

import io

struct Connection {
	buf_size int = 4096
mut:
	stream io.ReaderWriter
}

// read.v
module foo

// Note the missing `import io` and `if err is io.Eof` check in read() fn

// No issue if uncomment this import
// import io

pub fn (mut c Connection) read() !string {
	mut res := []u8{}
	mut nn := 0
	for {
		mut buf := []u8{len: c.buf_size, cap: c.buf_size}
		n := c.stream.read(mut buf) or {
			if err is io.Eof {
				break
			} else {
				return err
			}
		}
		nn += n
		if n == 0 {
			break
		}
		res << buf[..n]
		if res[nn - 1] == `\n` {
			break
		}
	}
	return res#[..-1].bytestr()
}

// v.mod
Module {
	name: 'foo'
	description: ''
	version: '0.0.0'
	license: 'MIT'
	dependencies: []
}

Run in foo/ dir:

v -check .

Expected Behavior

Some normal V error.

Current Behavior

V panic: 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`.

 v hash: 9335a84
    pid: 0x12ce5a
    tid: 0x12ce5a
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:22311: at builtin___v_panic: Backtrace
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:38705: by v__ast__default_table_panic_handler
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:38711: by v__ast__Table_panic
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:39428: by v__ast__Table_sym
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:7233: by v__checker__Checker_infix_expr
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59830: by v__checker__Checker_expr
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:6667: by v__checker__Checker_if_expr
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59328: by v__checker__Checker_expr
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:58573: by v__checker__Checker_stmt
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59260: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:2997: by v__checker__Checker_call_expr
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59529: by v__checker__Checker_expr
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:53232: by v__checker__Checker_assign_stmt
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:58615: by v__checker__Checker_stmt
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59260: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59237: by v__checker__Checker_stmts
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:6551: by v__checker__Checker_for_stmt
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:58647: by v__checker__Checker_stmt
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59260: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:59237: by v__checker__Checker_stmts
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:2756: by v__checker__Checker_fn_decl
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:58638: by v__checker__Checker_stmt
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:56312: by v__checker__Checker_check
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:56426: by v__checker__Checker_check_files
/tmp/v_1000/v2.01KG0H1W5FN6DDC86HDR5FKA8Z.tmp.c:60936: by v__builder__Builder_middle_stages

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.5.0 9335a84

Environment details (OS name and version, etc.)

V full version	V 0.5.0 19e79c4.9335a84
OS	linux, Linux version 6.18.6-arch1-1 (linux@archlinux) (gcc (GCC) 15.2.1 20260103, GNU ld (GNU Binutils) 2.45.1) #1 SMP PREEMPT_DYNAMIC Sun, 18 Jan 2026 00:34:07 +0000
Processor	16 cpus, 64bit, little endian, 12th Gen Intel(R) Core(TM) i5-1240P
Memory	4.28GB/15.34GB
V executable	/home/ge/.vlang/v
V last modified time	2026-01-27 20:06:54
V home dir	OK, value: /home/ge/.vlang
VMODULES	OK, value: /home/ge/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /tmp/foo
Git version	git version 2.52.0
V git status	weekly.2026.03-112-g9335a84e
.git/config present	true
cc version	cc (GCC) 15.2.1 20260103
gcc version	gcc (GCC) 15.2.1 20260103
clang version	clang version 21.1.6
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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