^start of line
Non-Capturing Group(?:[Ee]rror: )? ?repeats the group contents below at most once:
Ethe literal E (6910 / 1058 / 4516) (case sensitive)
ethe literal e (10110 / 1458 / 6516) (case sensitive)
rror: the literal text rror: (case sensitive) .any Unicode character (except for line terminators)
.any Unicode character (except for line terminators)
Negated Character Class[^:]* *matches any number of characters outside the set below:
:the literal : (5810 / 728 / 3A16)
:the literal : (5810 / 728 / 3A16)
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
:?optionally matches the literal : (5810 / 728 / 3A16)
?repeats the group contents below at most once:
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
:?optionally matches the literal : (5810 / 728 / 3A16)
the literal (3210 / 408 / 2016)
.*any Unicode character (except for line terminators), repeated any number of times
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string