Project: libcst

Language python
OSS-Fuzz project link
Project repository link
Build status: Fuzzers succeeding: Build log
Build status: Code coverage failing: Build log
Build status: Fuzz Introspector succeeding: Build log
Fuzzer count 1
Lines of code N/A
Lines covered N/A
Code coverage N/A
Code coverage report Report link
Static reachability 3.38%
Fuzz Introspector report Report link (from 2025-07-23)

Historical Progression

Functions of interest to fuzz

This section outlines functions that may be of interest to fuzz. They are based on ranking functions that have a lot of complexity but currently exhibit low code coverage. The complexity is calculated based on the function itself as well as the functions called by the given function, i.e. the tree of code that the function triggers.


This is only a minor amount of introspection information available for this project. Please consult the Fuzz Introspector report for more information, e.g. the introspection table of all functions in the target project available here.

Function name Function source file Accumulated cyclomatic complexity Code coverage
libcst.codemod.commands.rename.RenameCommand.leave_Attribute libcst.codemod.commands.rename 3186 0.0%
libcst.codemod.commands.rename.leave_import_decorator.wrapper libcst.codemod.commands.rename 3173 0.0%
libcst.codemod.commands.rename.RenameCommand.leave_Name libcst.codemod.commands.rename 3173 0.0%
libcst.codemod.commands.rename.RenameCommand.leave_ImportFrom libcst.codemod.commands.rename 3162 0.0%
libcst.codemod.commands.rename.RenameCommand.gen_replacement libcst.codemod.commands.rename 3128 0.0%
libcst.codegen.gen_matcher_classes._get_fields libcst.codegen.gen_matcher_classes 2915 0.0%
libcst.codegen.gen_matcher_classes._get_clean_type_and_aliases libcst.codegen.gen_matcher_classes 2906 0.0%
libcst.codemod.visitors._apply_type_annotations.ImportedSymbolCollector.visit_ClassDef libcst.codemod.visitors._apply_type_annotations 2393 0.0%
libcst.codemod.visitors._apply_type_annotations.ImportedSymbolCollector.visit_Name libcst.codemod.visitors._apply_type_annotations 2393 0.0%
libcst.codemod.visitors._apply_type_annotations.ImportedSymbolCollector.visit_Attribute libcst.codemod.visitors._apply_type_annotations 2393 0.0%