cgen error: could not generate string method `redict__Nil_str` for type `redict__Nil`

[einar-hjortdal]

Describe the bug

cgen error

Reproduction Steps

git clone https://github.com/einar-hjortdal/redict.git
cd redict
git checkout 832078873655ec1cc5b59986a50cc79041496a88
v install
v -n run command_test.v 

Expected Behavior

no cgen error

Current Behavior

cgen error: could not generate string method `redict__Nil_str` for type `redict__Nil`

Possible Solution

No response

Additional Information/Context

Note that I don't get the usual message about cgen errors should never happen etc.

V version

V 0.5.1 1b7486a

Environment details (OS name and version, etc.)

V full version	V 0.5.1 58f1857.1b7486a
OS	linux, "openmamba release 2026.4 for x86_64 (rolling)"
Processor	8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
Memory	6.26GB/31.17GB
V executable	/home/einar/.local/lib64/v/v
V last modified time	2026-04-24 08:01:03
V home dir	OK, value: /home/einar/.local/lib64/v
VMODULES	OK, value: /home/einar/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /home/einar/Documents/projects/vlang/active/redict
Git version	git version 2.54.0
V git status	weekly.2026.03-1709-g1b7486a1
.git/config present	true
cc version	cc (GCC) 15.2.1 20251019
gcc version	gcc (GCC) 15.2.1 20251019
clang version	N/A
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) 2.43

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[einar-hjortdal]

This is caused by Nil being an undefined type.

Here the type Nil is used in a match statement, but no such type is defined.