Bug Report
Description
I'm trying to bump from v. 1.6.2 to the next sensible prerelease, like 1.6.3-dev.1, but semantice-release crashes:
::ERROR:: Cannot increment a non-prerelease version with a prerelease level bump
I have the following config in pyproject.toml:
[tool.semantic_release.branches.main]
prerelease = false
prerelease_token = "dev"
[tool.semantic_release.commit_parser_options]
allowed_tags = [
# ...
"test",
]
minor_tags = ["feature", "feat"]
patch_tags = ["fix", "perf", "enh"]
default_bump_level = 1A git log like:
$ git log
commit c76dcd39cd627facc8b07e9aede40474faf4833c (HEAD -> main, origin/main, origin/HEAD)
Author: css <114182330+css-optivoy@users.noreply.github.com>
Date: Thu Apr 16 10:56:33 2026 +0200
test: Fixes some test. (#182)
commit 655fd33399a5431b2efe544861e7489d9dfe1020 (tag: 1.6.2)
Author: semantic-release <semantic-release>
Date: Thu Apr 16 10:31:34 2026 +0200
1.6.2
Automatically generated by python-semantic-release
Expected behavior
I expected semantic-release to create a new version bump from v. 1.6.2 to the next sensible prerelease, like 1.6.3-dev.1.
Actual behavior
$ semantic-release -vv --noop version --as-prerelease --prerelease-token=dev
[10:58:04] DEBUG logging level set to: DEBUG main.py:130
🛡 You are running in no-operation mode, because the '--noop' flag was supplied
DEBUG global cli options: GlobalCommandLineOptions(noop=True, verbosity=2, config_file='pyproject.toml', strict=False) main.py:142
INFO Loading configuration from pyproject.toml util.py:77
DEBUG Trying to parse configuration pyproject.toml in TOML format util.py:80
INFO Using group 'main' options, as '(main|master)' matches 'main' config.py:590
DEBUG hvcs token is not set config.py:779
WARNING Token value is missing! config.py:782
DEBUG Parsing git url 'git@github.com:.....git' helpers.py:245
DEBUG inverted tag_format '{version}' to '(?P<version>.+)' translator.py:44
DEBUG is_forced_prerelease: as_prerelease = True, forced_level_bump = None, prerelease = False version.py:71
INFO Forcing use of dev as the prerelease token
[...]
INFO found 317 previous tags algorithm.py:60
INFO The last full version in this branch's history was 1.6.2 algorithm.py:298
INFO The latest release in this branch's history was 1.6.2 algorithm.py:328
INFO Found 1 commits since the last release! algorithm.py:340
DEBUG parsed the following distinct levels from the commits since the last release: {<LevelBump.PRERELEASE_REVISION: 1>} algorithm.py:378
INFO The type of the next release release is: prerelease_revision algorithm.py:384
DEBUG prerelease=True and the latest version 1.6.2 is not a prerelease algorithm.py:155
ValueError: Cannot increment a non-prerelease version with a prerelease level bump
Traceback (most recent call last):
File "/home/user/..._env/lib/python3.13/site-packages/semantic_release/__main__.py", line 16, in main
cli_main(args=sys.argv[1:])
~~~~~~~~^^^^^^^^^^^^^^^^^^^
File "/home/user/..._env/lib/python3.13/site-packages/click/core.py", line 1161, in __call__
return self.main(*args, **kwargs)
~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/home/user/..._env/lib/python3.13/site-packages/click/core.py", line 1082, in main
rv = self.invoke(ctx)
File "/home/user/..._env/lib/python3.13/site-packages/click/core.py", line 1697, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "/home/user/..._env/lib/python3.13/site-packages/click/core.py", line 1443, in invoke
return ctx.invoke(self.callback, **ctx.params)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/user/..._env/lib/python3.13/site-packages/click/core.py", line 788, in invoke
return __callback(*args, **kwargs)
File "/home/user/..._env/lib/python3.13/site-packages/click/decorators.py", line 45, in new_func
return f(get_current_context().obj, *args, **kwargs)
File "/home/user/..._env/lib/python3.13/site-packages/semantic_release/cli/commands/version.py", line 537, in version
new_version = next_version(
repo=git_repo,
...<4 lines>...
allow_zero_version=runtime.allow_zero_version,
)
File "/home/user/..._env/lib/python3.13/site-packages/semantic_release/version/algorithm.py", line 395, in next_version
return _increment_version(
latest_version=latest_version,
...<5 lines>...
allow_zero_version=allow_zero_version,
)
File "/home/user/..._env/lib/python3.13/site-packages/semantic_release/version/algorithm.py", line 166, in _increment_version
raise ValueError(
"Cannot increment a non-prerelease version with a prerelease level bump"
)
::ERROR:: Cannot increment a non-prerelease version with a prerelease level bump
Environment
- Operating System (w/ version): Ubuntu 25.10
- Python version: Python 3.13.2
- Pip version: pip 25.1
- Semantic-release version: 10.5.3
- Build tool (w/ version): NA
Bug Report
Description
I'm trying to bump from v.
1.6.2to the next sensible prerelease, like1.6.3-dev.1, but semantice-release crashes:I have the following config in
pyproject.toml:A
git loglike:Expected behavior
I expected semantic-release to create a new version bump from v.
1.6.2to the next sensible prerelease, like1.6.3-dev.1.Actual behavior
Environment