Remove the redundant REG_NEWLINE regcomp() flag from the code that
compiles a fixed-string regular-expression.
The REG_NEWLINE causes metacharacters such as "." to match a newline,
since the basic_regex_quote_buf() function being called here escapes
all metacharacters using REG_NEWLINE is confusing and redundant.
The use of this flag was introduced as an unintended emergent property
of 793dc676e0 ("grep/icase: avoid kwsset when -F is specified",
2016-06-25).
That change amended the existing regflags, which were initialized to
REG_NEWLINE in init_grep_defaults() assuming a subsequent non-fixed
regcomp().
Manual testing reveals that this was always redundant, since no flags
of any use were inherited from opt->regflags even back
then. 793dc676e0 passes all tests with this on top:
diff --git a/grep.c b/grep.c
index 627ae3e3e8..89e84ed7fd 100644
--- a/grep.c
+++ b/grep.c
@@ -407,3 +407,3 @@ static void compile_fixed_regexp(struct grep_pat *p,
struct grep_opt *opt)
basic_regex_quote_buf(&sb, p->pattern);
- regflags = opt->regflags & ~REG_EXTENDED;
+ regflags = 0;
if (opt->ignore_case)
Since this isn't used for anything and never was, remove it to reduce
confusion when reading this code.
Signed-off-by: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
---
grep.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/grep.c b/grep.c
index 11a86548d6..2efec0e182 100644
--- a/grep.c
+++ b/grep.c
@@ -593,7 +593,7 @@ static void compile_fixed_regexp(struct grep_pat *p, struct
grep_opt *opt)
{
struct strbuf sb = STRBUF_INIT;
int err;
- int regflags = REG_NEWLINE;
+ int regflags = 0;
basic_regex_quote_buf(&sb, p->pattern);
if (opt->ignore_case)
--
2.13.1.611.g7e3b11ae1
