ripgrep

Sponsorship is appreciated!

This release fixes a number of bugs related to gitignore matching as well as some performance improvements in directory tree traversal.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Platform support:

• aarch64-unknown-linux-musl is now included in the release binaries for ripgrep.

Performance improvements:

• PERF #3293: Improves directory traversal time on very large corpora.

Feature enhancements:

• FEATURE #3275: ripgrep now respects GIT_CONFIG_GLOBAL and GIT_CONFIG_SYSTEM.

Bug fixes:

• BUG #3212: Don't check for the existence of .jj when --no-ignore is used.
• BUG #3320, BUG #3376, BUG #3419: Fix gitignore matching bug when searching across multiple directories.

Sponsorship is appreciated!

This is a small release that fixes a bug with how ripgrep handles line buffering. This might manifest as ripgrep printing output later than you expect or not working correctly with tail -f (even if you're using the --line-buffered flag).

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Bug fixes:

• BUG #3194: Fix a regression with --line-buffered introduced in ripgrep 15.0.0.

Feature enhancements:

• FEATURE #3192: Add hyperlink alias for Cursor.

Sponsorship is appreciated!

ripgrep 15 is a new major version release of ripgrep that mostly has bug fixes, some minor performance improvements and minor new features.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Here are some highlights:

• Several bugs around gitignore matching have been fixed. This includes a commonly reported bug related to applying gitignore rules from parent directories.
• A memory usage regression when handling very large gitignore files has been fixed.
• rg -vf file, where file is empty, now matches everything.
• The -r/--replace flag now works with --json.
• A subset of Jujutsu (jj) repositories are now treated as if they were git repositories. That is, ripgrep will respect jj's gitignores.
• Globs can now use nested curly braces.

Platform support:

• aarch64 for Windows now has release artifacts.
• powerpc64 no longer has release artifacts generated for it. The CI release workflow stopped working, and I didn't deem it worth my time to debug it. If someone wants this and can test it, I'd be happy to add it back.
• ripgrep binaries are now compiled with full LTO enabled. You may notice small performance improvements from this and a modest decrease in binary size.

Performance improvements:

• PERF #2111: Don't resolve helper binaries on Windows when -z/--search-zip isn't used.
• PERF #2865: Avoid using path canonicalization on Windows when emitting hyperlinks.
• PERF #3184: Improve performance of large values with -A/--after-context.

Bug fixes:

• BUG #829, BUG #2731, BUG #2747, BUG #2770, BUG #2778, BUG #2836, BUG #2933, BUG #3067: Fix bug related to gitignores from parent directories.
• BUG #1332, BUG #3001: Make rg -vf file where file is empty match everything.
• BUG #2177: Ignore a UTF-8 BOM marker at the start of .gitignore (and similar files).
• BUG #2750: Fix memory usage regression for some truly large gitignore files.
• BUG #2944: Fix a bug where the "bytes searched" in --stats output could be incorrect.
• BUG #2990: Fix a bug where ripgrep would mishandle globs that ended with a ..
• BUG #2094, BUG #3076: Fix bug with -m/--max-count and -U/--multiline showing too many matches.
• BUG #3100: Preserve line terminators when using -r/--replace flag.
• BUG #3108: Fix a bug where -q --files-without-match inverted the exit code.
• BUG #3131: Document inconsistency between -c/--count and --files-with-matches.
• BUG #3135: Fix rare panic for some classes of large regexes on large haystacks.
• BUG #3140: Ensure hyphens in flag names are escaped in the roff text for the man page.
• BUG #3155: Statically compile PCRE2 into macOS release artifacts on aarch64.
• BUG #3173: Fix ancestor ignore filter bug when searching whitelisted hidden files.
• BUG #3178: Fix bug causing incorrect summary statistics with --json flag.
• BUG #3179: Fix gitignore bug when searching absolute paths with global gitignores.
• BUG #3180: Fix a panicking bug when using -U/--multiline and -r/--replace.

Feature enhancements:

• Many enhancements to the default set of file types available for filtering.
• FEATURE #1872: Make -r/--replace work with --json.
• FEATURE #2708: Completions for the fish shell take ripgrep's config file into account.
• FEATURE #2841: Add italic to the list of available style attributes in --color.
• FEATURE #2842: Directories containing .jj are now treated as git repositories.
• FEATURE #2849: When using multithreading, schedule files to search in order given on CLI.
• FEATURE #2943: Add aarch64 release artifacts for Windows.
• FEATURE #3024: Add highlight color type, for styling non-matching text in a matching line.
• FEATURE #3048: Globs in ripgrep (and the globset crate) now support nested alternates.
• FEATURE #3096: Improve completions for --hyperlink-format in bash and fish.
• FEATURE #3102: Improve completions for --hyperlink-format in zsh.

Sponsorship is appreciated!

This is a minor release with a bug fix for a matching bug. In particular, a bug was found that could cause ripgrep to ignore lines that should match. That is, false negatives. It is difficult to characterize the specific set of regexes in which this occurs as it requires multiple different optimization strategies to collide and produce an incorrect result. But as one reported example, in ripgrep, the regex (?i:e.x|ex) does not match e-x when it should. (This bug is a result of an inner literal optimization performed in the grep-regex crate and not in the regex crate.)

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Bug fixes:

• BUG #2884: Fix bug where ripgrep could miss some matches that it should report.

Miscellaneous:

• MISC #2748: Remove ripgrep's simd-accel feature because it was frequently broken.

Sponsorship is appreciated!

This is a minor release with a few small new features and bug fixes. This release contains a bug fix for unbounded memory growth while walking a directory tree. This release also includes improvements to the completions for the fish shell, and release binaries for several additional ARM targets.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Bug fixes:

• BUG #2664: Fix unbounded memory growth in the ignore crate.

Feature enhancements:

• Added or improved file type filtering for Lean and Meson.
• FEATURE #2684: Improve completions for the fish shell.
• FEATURE #2702: Add release binaries for armv7-unknown-linux-gnueabihf, armv7-unknown-linux-musleabihf and armv7-unknown-linux-musleabi.

Sponsorship is appreciated!

This is a patch release with a few small bug fixes.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Bug fixes:

• BUG #2664: Fix --sortr=path. I left a todo!() in the source. Oof.

Sponsorship is appreciated!

This is a patch release with a few small bug fixes.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Bug fixes:

• BUG #2654: Fix deb release sha256 sum file.
• BUG #2658: Fix partial regression in the behavior of --null-data --line-regexp.
• BUG #2659: Fix Fish shell completions.
• BUG #2662: Fix typo in documentation for -i/--ignore-case.

Sponsorship is appreciated!

This a patch release meant to fix cargo install ripgrep on Windows.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

Bug fixes:

• BUG #2653: Include pkg/windows/Manifest.xml in crate package.

Sponsorship is appreciated!

ripgrep 14 is a new major version release of ripgrep that has some new features, performance improvements and a lot of bug fixes.

> In case you haven't heard of it before, ripgrep is a line-oriented search > tool that recursively searches the current directory for a regex pattern. > By default, ripgrep will respect gitignore rules and automatically skip > hidden files/directories and binary files.

The headlining feature in this release is hyperlink support. In this release, they are an opt-in feature but may change to an opt-out feature in the future. To enable them, try passing --hyperlink-format default. If you use [VS Code], then try passing --hyperlink-format vscode. Please [report your experience with hyperlinks][report-hyperlinks], positive or negative.

[VS Code]: https://code.visualstudio.com/ [report-hyperlinks]: https://github.com/BurntSushi/ripgrep/discussions/2611

Another headlining development in this release is that it contains a rewrite of its regex engine. You generally shouldn't notice any changes, except for some searches may get faster. You can read more about the [regex engine rewrite on my blog][regex-internals]. Please [report your performance improvements or regressions that you notice][report-perf].

[report-perf]: https://github.com/BurntSushi/ripgrep/discussions/2652

Finally, ripgrep switched the library it uses for argument parsing. Users should not notice a difference in most cases (error messages have changed somewhat), but flag overrides should generally be more consistent. For example, things like --no-ignore --ignore-vcs work as one would expect (disables all filtering related to ignore rules except for rules found in version control systems such as git).

[regex-internals]: https://blog.burntsushi.net/regex-internals/

BREAKING CHANGES:

• rg -C1 -A2 used to be equivalent to rg -A2, but now it is equivalent to rg -B1 -A2. That is, -A and -B no longer completely override -C. Instead, they only partially override -C.

Build process changes:

• ripgrep's shell completions and man page are now created by running ripgrep with a new --generate flag. For example, rg --generate man will write a man page in roff format on stdout. The release archives have not changed.
• The optional build dependency on asciidoc or asciidoctor has been dropped. Previously, it was used to produce ripgrep's man page. ripgrep now owns this process itself by writing roff directly.

Performance improvements:

• PERF #1746: Make some cases with inner literals faster.
• PERF #1760: Make most searches with \b look-arounds (among others) much faster.
• PERF #2591: Parallel directory traversal now uses work stealing for faster searches.
• PERF #2642: Parallel directory traversal has some contention reduced.

Feature enhancements:

• Added or improved file type filtering for Ada, DITA, Elixir, Fuchsia, Gentoo, Gradle, GraphQL, Markdown, Prolog, Raku, TypeScript, USD, V
• FEATURE #665: Add a new --hyperlink-format flag that turns file paths into hyperlinks.
• FEATURE #1709: Improve documentation of ripgrep's behavior when stdout is a tty.
• FEATURE #1737: Provide binaries for Apple silicon.
• FEATURE #1790: Add new --stop-on-nonmatch flag.
• FEATURE #1814: Flags are now categorized in -h/--help output and ripgrep's man page.
• FEATURE #1838: An error is shown when searching for NUL bytes with binary detection enabled.
• FEATURE #2195: When extra-verbose mode is enabled in zsh, show extra file type info.
• FEATURE #2298: Add instructions for installing ripgrep using cargo binstall.
• FEATURE #2409: Added installation instructions for winget.
• FEATURE #2425: Shell completions (and man page) can be created via rg --generate.
• FEATURE #2524: The --debug flag now indicates whether stdin or ./ is being searched.
• FEATURE #2643: Make -d a short flag for --max-depth.
• FEATURE #2645: The --version output will now also contain PCRE2 availability information.

Bug fixes:

• BUG #884: Don't error when -v/--invert-match is used multiple times.
• BUG #1275: Fix bug with \b assertion in the regex engine.
• BUG #1376: Using --no-ignore --ignore-vcs now works as one would expect.
• BUG #1622: Add note about error messages to -z/--search-zip documentation.
• BUG #1648: Fix bug where sometimes short flags with values, e.g., -M 900, would fail.
• BUG #1701: Fix bug where some flags could not be repeated.
• BUG #1757: Fix bug when searching a sub-directory didn't have ignores applied correctly.
• BUG #1891: Fix bug when using -w with a regex that can match the empty string.
• BUG #1911: Disable mmap searching in all non-64-bit environments.
• BUG #1966: Fix bug where ripgrep can panic when printing to stderr.
• BUG #2046: Clarify that --pre can accept any kind of path in the documentation.
• BUG #2108: Improve docs for -r/--replace syntax.
• BUG #2198: Fix bug where --no-ignore-dot would not ignore .rgignore.
• BUG #2201: Improve docs for -r/--replace flag.
• BUG #2288: -A and -B now only each partially override -C.
• BUG #2236: Fix gitignore parsing bug where a trailing \/ resulted in an error.
• BUG #2243: Fix --sort flag for values other than path.
• BUG #2246: Add note in --debug logs when binary files are ignored.
• BUG #2337: Improve docs to mention that --stats is always implied by --json.
• BUG #2381: Make -p/--pretty override flags like --no-line-number.
• BUG #2392: Improve global git config parsing of the excludesFile field.
• BUG #2418: Clarify sorting semantics of --sort=path.
• BUG #2458: Make --trim run before -M/--max-columns takes effect.
• BUG #2479: Add documentation about .ignore/.rgignore files in parent directories.
• BUG #2480: Fix bug when using inline regex flags with -e/--regexp.
• BUG #2505: Improve docs for --vimgrep by mentioning footguns and some work-arounds.
• BUG #2519: Fix incorrect default value in documentation for --field-match-separator.
• BUG #2523: Make executable searching take .com into account on Windows.
• BUG #2574: Fix bug in -w/--word-regexp that would result in incorrect match offsets.
• BUG #2623: Fix a number of bugs with the -w/--word-regexp flag.
• BUG #2636: Strip release binaries for macOS.

ripgrep 13 is a new major version release of ripgrep that primarily contains bug fixes, some performance improvements and a few minor breaking changes. There is also a fix for a security vulnerability on Windows (CVE-2021-3013).

In case you haven't heard of it before, ripgrep is a line-oriented search tool that recursively searches the current directory for a regex pattern. By default, ripgrep will respect gitignore rules and automatically skip hidden files/directories and binary files.

Some highlights:

A new short flag, -., has been added. It is an alias for the --hidden flag, which instructs ripgrep to search hidden files and directories.

ripgrep is now using a new vectorized implementation of memmem, which accelerates many common searches. If you notice any performance regressions (or major improvements), I'd love to hear about them through an issue report!

Also, for Windows users targeting MSVC, Cargo will now build fully static executables of ripgrep. The release binaries for ripgrep 13 have been compiled using this configuration.

BREAKING CHANGES:

Binary detection output has changed slightly.

In this release, a small tweak has been made to the output format when a binary file is detected. Previously, it looked like this:

Binary file FOO matches (found "\0" byte around offset XXX)

Now it looks like this:

FOO: binary file matches (found "\0" byte around offset XXX)

vimgrep output in multi-line now only prints the first line for each match.

See issue 1866 for more discussion on this. Previously, every line in a match was duplicated, even when it spanned multiple lines. There are no changes to vimgrep output when multi-line mode is disabled.

In multi-line mode, --count is now equivalent to --count-matches.

This appears to match how pcre2grep implements --count. Previously, ripgrep would produce outright incorrect counts. Another alternative would be to simply count the number of lines---even if it's more than the number of matches---but that seems highly unintuitive.

FULL LIST OF FIXES AND IMPROVEMENTS:

Security fixes:

• CVE-2021-3013: Fixes a security hole on Windows where running ripgrep with either the -z/--search-zip or --pre flags can result in running arbitrary executables from the current directory.
• VULN #1773: This is the public facing issue tracking CVE-2021-3013. ripgrep's README now contains a section describing how to report a vulnerability.

Performance improvements:

• PERF #1657: Check if a file should be ignored first before issuing stat calls.
• PERF memchr#82: ripgrep now uses a new vectorized implementation of memmem.

Feature enhancements:

• Added or improved file type filtering for ASP, Bazel, dvc, FlatBuffers, Futhark, minified files, Mint, pofiles (from GNU gettext) Racket, Red, Ruby, VCL, Yang.
• FEATURE #1404: ripgrep now prints a warning if nothing is searched.
• FEATURE #1613: Cargo will now produce static executables on Windows when using MSVC.
• FEATURE #1680: Add -. as a short flag alias for --hidden.
• FEATURE #1842: Add --field-{context,match}-separator for customizing field delimiters.
• FEATURE #1856: The README now links to a Spanish translation.

Bug fixes:

• BUG #1277: Document cygwin path translation behavior in the FAQ.
• BUG #1739: Fix bug where replacements were buggy if the regex matched a line terminator.
• BUG #1311: Fix multi-line bug where a search & replace for \n didn't work as expected.
• BUG #1401: Fix buggy interaction between PCRE2 look-around and -o/--only-matching.
• BUG #1412: Fix multi-line bug with searches using look-around past matching lines.
• BUG #1577: Fish shell completions will continue to be auto-generated.
• BUG #1642: Fixes a bug where using -m and -A printed more matches than the limit.
• BUG #1703: Clarify the function of -u/--unrestricted.
• BUG #1708: Clarify how -S/--smart-case works.
• BUG #1730: Clarify that CLI invocation must always be valid, regardless of config file.
• BUG #1741: Fix stdin detection when using PowerShell in UNIX environments.
• BUG #1756: Fix bug where foo/** would match foo, but it shouldn't.
• BUG #1765: Fix panic when --crlf is used in some cases.
• BUG #1638: Correctly sniff UTF-8 and do transcoding, like we do for UTF-16.
• BUG #1816: Add documentation for glob alternate syntax, e.g., {a,b,..}.
• BUG #1847: Clarify how the --hidden flag works.
• BUG #1866: Fix bug when computing column numbers in --vimgrep mode.
• BUG #1868: Fix bug where --passthru and -A/-B/-C did not override each other.
• BUG #1869: Clarify docs for --files-with-matches and --files-without-match.
• BUG #1878: Fix bug where \A could produce unanchored matches in multiline search.
• BUG 94e4b8e3: Fix column numbers with --vimgrep is used with -U/--multiline.

ripgrep 12.1.1 is a patch release that fixes a couple small bugs. In particular, the ripgrep 12.1.0 release did not tag new releases for all of its in-tree dependencies. As a result, ripgrep built dependencies from crates.io would produce a different build than compiling ripgrep from source on the 12.1.0 tag. Namely, some crates like grep-cli had unreleased changes.

In case you haven't heard of it before, ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your gitignore rules and automatically skip hidden files/directories and binary files.

Bug fixes:

• BUG #1581: Corrects some egregious markup output in --help.
• BUG #1591: Mention the special $0 capture group in docs for the -r/--replace flag.
• BUG #1602: Fix failing test resulting from out-of-sync dependencies.

ripgrep 12.1.0 is a small minor version release that mostly includes bug fixes and documentation improvements. This release also contains some important notices for downstream packagers.

In case you haven't heard of it before, ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.

Notices for downstream ripgrep package maintainers:

• Fish shell completions will be removed in the ripgrep 13 release. See #1577 for more details.
• ripgrep has switched from a2x to asciidoctor to generate the man page. If asciidoctor is not present, then ripgrep will currently fall back to a2x. Support for a2x will be dropped in the ripgrep 13 release. See #1544 for more details.

Feature enhancements:

• FEATURE #1547: Support decompressing .Z files via uncompress.

Bug fixes:

• BUG #1252: Add a section on the --pre flag to the GUIDE.
• BUG #1339: Improve error message when a pattern with invalid UTF-8 is provided.
• BUG #1524: Note how to escape a $ when using --replace.
• BUG #1537: Fix match bug caused by inner literal optimization.
• BUG #1544: ripgrep now uses asciidoctor instead of a2x to generate its man page.
• BUG #1550: Substantially reduce peak memory usage when searching wide directories.
• BUG #1571: Add note about configuration files in --type-{add,clear} docs.
• BUG #1573: Fix incorrect --count-matches output when using look-around.

ripgrep 12.0.1 is a small patch release that includes a minor bug fix relating to superfluous error messages when searching git repositories with sub-modules. This was a regression introduced in the 12.0.0 release.

In case you haven't heard of it before, ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.

Bug fixes:

• BUG #1520: Don't emit spurious error messages in git repositories with submodules.

ripgrep 12 is a new major version release of ripgrep that contains many bug fixes, several important performance improvements and a few minor new features.

In case you haven't heard of it before, ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.

In a near future release, I am hoping to add an indexing feature to ripgrep, which will dramatically speed up searching by building an index. Feedback would very much be appreciated, especially on the user experience which will be difficult to get right.

This release has no known breaking changes.

Deprecations:

• The --no-pcre2-unicode flag is deprecated. Instead, use the --no-unicode flag, which applies to both the default regex engine and PCRE2. For now, --no-pcre2-unicode and --pcre2-unicode are aliases to --no-unicode and --unicode, respectively. The --[no-]pcre2-unicode flags may be removed in a future release.
• The --auto-hybrid-regex flag is deprecated. Instead, use the new --engine flag with the auto value.

Performance improvements:

• PERF #1087: ripgrep is smarter when detected literals are whitespace.
• PERF #1381: Directory traversal is sped up with speculative ignore-file existence checks.
• PERF cd8ec38a: Improve inner literal detection to cover more cases more effectively. e.g., +Sherlock Holmes + now has Sherlock Holmes extracted instead of .
• PERF 6a0e0147: Improve literal detection when the -w/--word-regexp flag is used.
• PERF ad97e9c9: Improve overall performance of the -w/--word-regexp flag.

Feature enhancements:

• Added or improved file type filtering for erb, diff, Gradle, HAML, Org, Postscript, Skim, Slim, Slime, RPM Spec files, Typoscript, xml.
• FEATURE #1370: Add --include-zero flag that shows files searched without matches.
• FEATURE #1390: Add --no-context-separator flag that always hides context separators.
• FEATURE #1414: Add --no-require-git flag to allow ripgrep to respect gitignores anywhere.
• FEATURE #1420: Add --no-ignore-exclude to disregard rules in .git/info/exclude files.
• FEATURE #1466: Add --no-ignore-files flag to disable all --ignore-file flags.
• FEATURE #1488: Add '--engine' flag for easier switching between regex engines.
• FEATURE 75cbe88f: Add --no-unicode flag. This works on all supported regex engines.

Bug fixes:

• BUG #1291: ripgrep now works in non-existent directories.
• BUG #1319: Fix match bug due to errant literal detection.
• BUG #1335: Fixes a performance bug when searching plain text files with very long lines. This was a serious performance regression in some cases.
• BUG #1344: Document usage of --type all.
• BUG #1389: Fixes a bug where ripgrep would panic when searching a symlinked directory.
• BUG #1439: Improve documentation for ripgrep's automatic stdin detection.
• BUG #1441: Remove CPU features from man page.
• BUG #1442, BUG #1478: Improve documentation of the -g/--glob flag.
• BUG #1445: ripgrep now respects ignore rules from .git/info/exclude in worktrees.
• BUG #1485: Fish shell completions from the release Debian package are now installed to /usr/share/fish/vendor_completions.d/rg.fish.

ripgrep 11.0.2 is a new patch release that fixes a few bugs, including a performance regression and a matching bug when using the -F/--fixed-strings flag.

In case you haven't heard of it before, ripgrep is a line-oriented search tool that recursively searches your current directory for a regex pattern. By default, ripgrep will respect your .gitignore and automatically skip hidden files/directories and binary files.

Feature enhancements:

• FEATURE #1293: Added --glob-case-insensitive flag that makes --glob behave as --iglob.

Bug fixes:

• BUG #1246: Add translations to README, starting with an unofficial Chinese translation.
• BUG #1259: Fix bug where the last byte of a -f file was stripped if it wasn't a \n.
• BUG #1261: Document that no error is reported when searching for \n with -P/--pcre2.
• BUG #1284: Mention .ignore and .rgignore more prominently in the README.
• BUG #1292: Fix bug where --with-filename was sometimes enabled incorrectly.
• BUG #1268: Fix major performance regression in GitHub x86_64-linux binary release.
• BUG #1302: Show better error messages when a non-existent preprocessor command is given.
• BUG #1334: Fix match regression with -F flag when patterns contain meta characters.