A modern, delicious implementation of the Nix package manager, focused on correctness, usability, and growth — and committed to doing right by its community
a0e38c16bc
Flex's regexes have an annoying feature: the dot matches everything
except a newline. This causes problems for expressions like:
"${0}\
"
where the backslash-newline combination matches this rule instead of the
intended one mentioned in the comment:
<STRING>\$|\\|\$\\ {
/* This can only occur when we reach EOF, otherwise the above
(...|\$[^\{\"\\]|\\.|\$\\.)+ would have triggered.
This is technically invalid, but we leave the problem to the
parser who fails with exact location. */
return STR;
}
However, the parser actually accepts the resulting token sequence
('"' DOLLAR_CURLY 0 '}' STR '"'), which is a problem because the lexer
rule didn't assign anything to yylval. Ultimately this leads to a crash
when dereferencing a NULL pointer in ExprConcatStrings::bindVars().
The fix does change the syntax of the language in some corner cases
but I think it's only turning previously invalid (or crashing) syntax
to valid syntax. E.g.
"a\
b"
and
''a''\
b''
were previously syntax errors but now both result in "a\nb".
Found by afl-fuzz.
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| .github | ||
| config | ||
| corepkgs | ||
| doc/manual | ||
| maintainers | ||
| misc | ||
| mk | ||
| perl | ||
| scripts | ||
| src | ||
| tests | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .gitignore | ||
| .travis.yml | ||
| bootstrap.sh | ||
| configure.ac | ||
| COPYING | ||
| local.mk | ||
| Makefile | ||
| Makefile.config.in | ||
| nix.spec.in | ||
| README.md | ||
| release-common.nix | ||
| release.nix | ||
| shell.nix | ||
| version | ||
Nix, the purely functional package manager
Nix is a new take on package management that is fairly unique. Because of its purity aspects, a lot of issues found in traditional package managers don't appear with Nix.
To find out more about the tool, usage and installation instructions, please read the manual, which is available on the Nix website at http://nixos.org/nix/manual.
Contributing
Take a look at the Hacking Section of the manual. It helps you to get started with building Nix from source.
License
Nix is released under the LGPL v2.1
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit.