'/(?;x/' => 'Sequence (?;...) not recognized in regex; marked by {#} in m/(?;{#}x/',
'/(?<;x/' => 'Sequence (?<;...) not recognized in regex; marked by {#} in m/(?<;{#}x/',
+ '/(?\ix/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}ix/',
+ '/(?\mx/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}mx/',
+ '/(?\:x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}:x/',
+ '/(?\=x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}=x/',
+ '/(?\!x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}!x/',
+ '/(?\<=x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}<=x/',
+ '/(?\<!x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}<!x/',
+ '/(?\>x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}>x/',
+
'/((x)/' => 'Unmatched ( in regex; marked by {#} in m/({#}(x)/',
"/x{$inf_p1}/" => "Quantifier in {,} bigger than $inf_m1 in regex; marked by {#} in m/x{{#}$inf_p1}/",
'm/[a-\d]/' => 'False [] range "a-\d" in regex; marked by {#} in m/[a-\d{#}]/',
'm/[\w-x]/' => 'False [] range "\w-" in regex; marked by {#} in m/[\w-{#}x]/',
+ 'm/[a-\pM]/' => 'False [] range "a-\pM" in regex; marked by {#} in m/[a-\pM{#}]/',
+ 'm/[\pM-x]/' => 'False [] range "\pM-" in regex; marked by {#} in m/[\pM-{#}x]/',
"m'\\y'" => 'Unrecognized escape \y passed through in regex; marked by {#} in m/\y{#}/',
);