Fixes a crash in SPARQL unicode escapes decoding

lib/spargebra/src/parser.rs

@@ -731,7 +731,7 @@ impl<'a> Iterator for UnescapeUnicodeCharIterator<'a> {
                             return Some('\\');
                         }
                     }
-                    if let Some(c) = u32::from_str_radix(&self.buffer[1..5], 16)
+                    if let Some(c) = u32::from_str_radix(&self.buffer[1..], 16)
                         .ok()
                         .and_then(char::from_u32)
                     {
@@ -750,7 +750,7 @@ impl<'a> Iterator for UnescapeUnicodeCharIterator<'a> {
                             return Some('\\');
                         }
                     }
-                    if let Some(c) = u32::from_str_radix(&self.buffer[1..9], 16)
+                    if let Some(c) = u32::from_str_radix(&self.buffer[1..], 16)
                         .ok()
                         .and_then(char::from_u32)
                     {

testsuite/oxigraph-tests/sparql/long_unicode_escape_with_multibytes_char.rq

@@ -0,0 +1 @@
+\up6/ȅ

testsuite/oxigraph-tests/sparql/long_unicode_escape_with_multibytes_char.ru

@@ -0,0 +1 @@
+\up6/ȅ

testsuite/oxigraph-tests/sparql/manifest.ttl

@@ -9,6 +9,10 @@
     rdfs:label "Oxigraph SPARQL tests" ;
     mf:entries
     (
+    :small_unicode_escape_with_multibytes_char
+    :long_unicode_escape_with_multibytes_char
+    :small_unicode_escape_with_multibytes_char_update
+    :long_unicode_escape_with_multibytes_char_update
     :describe
     :describe_where
     :group_concat_with_null
@@ -21,6 +25,22 @@
     :update_dirtyRead
     ) .
 
+:small_unicode_escape_with_multibytes_char rdf:type mf:NegativeSyntaxTest ;
+    mf:name "Multibytes character at the end of a unicode espace sequence" ;
+    mf:action <small_unicode_escape_with_multibytes_char.rq> .
+
+:long_unicode_escape_with_multibytes_char rdf:type mf:NegativeSyntaxTest ;
+    mf:name "Multibytes character at the end of a unicode espace sequence" ;
+    mf:action <long_unicode_escape_with_multibytes_char.rq> .
+
+:small_unicode_escape_with_multibytes_char_update rdf:type mf:NegativeUpdateSyntaxTest11 ;
+    mf:name "Multibytes character at the end of a unicode espace sequence" ;
+    mf:action <small_unicode_escape_with_multibytes_char.ru> .
+
+:long_unicode_escape_with_multibytes_char_update rdf:type mf:NegativeUpdateSyntaxTest11 ;
+    mf:name "Multibytes character at the end of a unicode espace sequence" ;
+    mf:action <long_unicode_escape_with_multibytes_char.ru> .
+
 :describe rdf:type mf:QueryEvaluationTest ;
     mf:name "Simple DESCRIBE request" ;
     mf:action

testsuite/oxigraph-tests/sparql/small_unicode_escape_with_multibytes_char.rq

@@ -0,0 +1 @@
+\U0000p6/ȅ

testsuite/oxigraph-tests/sparql/small_unicode_escape_with_multibytes_char.ru

@@ -0,0 +1 @@
+\U0000p6/ȅ