as cast: cannot cast v.ast.UnknownTypeInfo to v.ast.Array

[quaesitor-scientiam]

V version: V 0.4.9 2744f38, press to see full `v doctor` output

launch_tool vexe : S:\repo\vlang\v.exe
launch_tool vroot : S:\repo\vlang
launch_tool tool_source : S:\repo\vlang\cmd\tools\vdoctor.v
launch_tool tool_exe : S:\repo\vlang\cmd\tools\vdoctor.exe
launch_tool tool_args : "-v" "doctor"
launch_tool should_compile: true
Compiling vdoctor with: ""S:\repo\vlang\v.exe" -g "S:\repo\vlang\cmd\tools\vdoctor.v""

V full version	V 0.4.9 45fd7eb.2744f38
OS	windows, Microsoft Windows 11 Pro 26100 64-bit
Processor	24 cpus, 64bit, little endian, AMD Ryzen 9 5900X 12-Core Processor
Memory	103.29GB/127.92GB
V executable	S:\repo\vlang\v.exe
V last modified time	2025-02-12 23:30:54
V home dir	OK, value: S:\repo\vlang
VMODULES	OK, value: C:\Users\john3.vmodules
VTMP	OK, value: S:\temp\v_0
Current working dir	OK, value: S:\vProjects\vDebug
Git version	git version 2.45.1.windows.1
V git status	weekly.2025.05-130-g2744f388
.git/config present	true
cc version	N/A
gcc version	N/A
clang version	clang version 18.1.8
msvc version	Microsoft (R) C/C++ Optimizing Compiler Version 19.42.34435 for x64
tcc version	tcc version 0.9.27 (x86_64 Windows)
tcc git status	thirdparty-windows-amd64 b425ac82
emcc version	N/A
glibc version	ldd (cygwin) 3.5.4

What did you do?
./v -g -o vdbg cmd/v && ./vdbg -color -g -no-parallel -no-retry-compilation -o S:\vProjects\vDebug\main.exe -g -no-builtin S:\vProjects\vDebug\main.v && S:\vProjects\vDebug\main.exe
See attached file S:\vProjects\vDebug\main.v

What did you see?

all .v files before:
v.pref.no_builtin is true, get_builtin_files == []
get_v_files(S:\vProjects\vDebug\main.v)
> just compile one file: "S:\vProjects\vDebug\main.v"
user_files: ['S:\vProjects\vDebug\main.v']
x: "S:\vProjects\vDebug\modules"
v.module_search_paths:
['S:\vProjects\vDebug', 'S:\repo\vlang\vlib', 'C:\Users\john3\.vmodules']
all .v files:
['S:\vProjects\vDebug\main.v']
build_c(S:\temp\v_0\main.exe.01JKYMAPW40M91WKN5Y8VPBJ5A.tmp.c)
�[1m0.929   �[22m ms Builder.front_stages.parse_files
  >> trying to find v.builder.nativebuilder in S:\vProjects\vDebug\v\builder\nativebuilder ..
  >> trying to find v.builder.nativebuilder in 
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[huly-for-github]

Connected to Huly®: V_0.6-22123

[quaesitor-scientiam]

module main

import v.builder.nativebuilder

fn main() {
	nativebuilder.start()
}

[JalonSolov]

This is failing in V itself, when compiled with v -o vdbg self. On Linux, I see this:

$ v -g -o vdbg self && git/v/vdbg -color -g -no-parallel -no-retry-compilation -no-builtin main.v && ./main
V self compiling (-g -o vdbg)...
================ V panic ================
   module: builtin
 function: __as_cast()
  message: as cast: cannot cast `v.ast.UnknownTypeInfo` to `v.ast.Array`
     file: /home/jalon/git/v/vlib/builtin/builtin.v:34
   v hash: 92f436d
=========================================
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/builtin/builtin.c.v:87: at panic_debug: Backtrace
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/builtin/builtin.v:34: by __as_cast
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/ast/table.v:946: by v__ast__Table_known_type_idx
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/ast/table.v:1501: by v__ast__Table_known_type_names
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/checker/checker.v:5343: by v__checker__Checker_ensure_type_exists
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/checker/fn.v:370: by v__checker__Checker_fn_decl
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/checker/checker.v:2329: by v__checker__Checker_stmt
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/checker/checker.v:274: by v__checker__Checker_check
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/checker/checker.v:334: by v__checker__Checker_check_files
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/builder.v:131: by v__builder__Builder_middle_stages
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/builder.v:163: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/cbuilder/cbuilder.v:72: by v__builder__cbuilder__gen_c
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/cbuilder/cbuilder.v:60: by v__builder__cbuilder__build_c
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/cbuilder/cbuilder.v:50: by v__builder__cbuilder__compile_c
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/rebuilding.v:325: by v__builder__Builder_rebuild
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/v/builder/compile.v:17: by v__builder__compile
/tmp/v_1000/../../../../../../home/jalon/git/v/cmd/v/v.v:189: by main__rebuild
/tmp/v_1000/../../../../../../home/jalon/git/v/cmd/v/v.v:147: by main__main
/tmp/v_1000/../../../../../../tmp/v_1000/vdbg.01JKYNV2STYKGZWB21R25JCPT7.tmp.c:38039: by main
$

Since the example is to be built with -no-builtin, it is not coming from there. It also isn't coming from the v self part, as if I remove that, it still fails with the same error/traceback.

[JalonSolov]

I tried again just running V instead of the vdbg version:

$ v  -color -g -no-parallel -no-retry-compilation -no-builtin main.v
V panic: as cast: cannot cast `v.ast.UnknownTypeInfo` to `v.ast.Array`
v hash: 92f436d
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:19288: at _v_panic: Backtrace
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:19757: by __as_cast
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:37329: by v__ast__Table_known_type_idx
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:37746: by v__ast__Table_known_type_names
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:55379: by v__checker__Checker_ensure_type_exists
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:59741: by v__checker__Checker_fn_decl
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51751: by v__checker__Checker_stmt
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:49627: by v__checker__Checker_check
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:49690: by v__checker__Checker_check_files
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:48693: by v__builder__Builder_middle_stages
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:48731: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51239: by v__builder__cbuilder__gen_c
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51211: by v__builder__cbuilder__build_c
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51202: by v__builder__cbuilder__compile_c
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51119: by v__builder__Builder_rebuild
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:50272: by v__builder__compile
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51630: by main__rebuild
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:51585: by main__main
/tmp/v_1000/v2.01JKX76MHTBYCBDYAMS7PE91MG.tmp.c:52282: by main
$

[JalonSolov]

If you leave out the -no-builtin switch, it compiles clean.

[quaesitor-scientiam]

It does for me too. But @spytheman advise me to use -no-builtin for the initial native work. So it needs to be fixed.