log: log.info breaks with `-cc gcc`, `-prod` and `-cflags -fno-inline-small-functions` at runtime

[esquerbatua]

Describe the bug

Run build with flags, using log.info

Reproduction Steps

compile with: v -prod -cflags "-fno-inline-small-functions" .

module main

import log

fn main() {
	println('Hello, World!')
	log.info('test')
}

Expected Behavior

Hello, World!
<time> [INFO ] test

Current Behavior

V panic: invalid log_default_level: info
v hash: 499283e
addr2line: '[0x401b3c]': No such file
[0x401b3c]
addr2line: '[0x41db48]': No such file
[0x41db48]
addr2line: '[0x41fd10]': No such file
[0x41fd10]
addr2line: '[0x401b65]': No such file
[0x401b65]

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.11 f822792.ee6eed3

Environment details (OS name and version, etc.)

V full version	V 0.4.11 f822792.ee6eed3
OS	linux, Ubuntu 24.04.2 LTS
Processor	16 cpus, 64bit, little endian, AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
Memory	60.5GB/86.23GB
V executable	/home/esquerbatua/git/v/v
V last modified time	2025-07-10 10:12:50
V home dir	OK, value: /home/esquerbatua/git/v
VMODULES	OK, value: /home/esquerbatua/.vmodules
VTMP	OK, value: /tmp/v_1000
Git version	git version 2.43.0
V git status	0.4.11-96-gee6eed3c
.git/config present	true
cc version	cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
gcc version	gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
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 (Ubuntu GLIBC 2.39-0ubuntu8.4) 2.39

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[huly-for-github]

Connected to Huly®: V_0.6-23305

[spytheman]

As a temporary workaround for now, add also -cg or -g .

For me, the affected compiler is gcc-11 .

I've also tested gcc-10, gcc-9, gcc-8 and clang, which work without triggering the panic.

[spytheman]

55b1236 contains a more permanent solution, that does not require passing custom flags:

You can get it with v up, as usual.

[esquerbatua]

ty, great job!