The page cache is one directory per document; the shipped suites measure under a UTF-8 locale (from dev 3321e7c9e36e)

tst/kdesc_test.sh

@@ -49,6 +49,9 @@ else
 fi
 
 # shows NAME PATTERN CMD... — exits 0 and the output matches PATTERN.
+# The matching grep alone runs under a UTF-8 locale (TODO 78): under C its
+# "." counts bytes, so the width test 10a fails and 10b can falsely pass; the
+# command itself keeps the caller's locale.
 shows() {
     local name="$1" pattern="$2"; shift 2
     local out status
@@ -56,7 +59,7 @@ shows() {
     if [ $status -gt 128 ]; then
         echo "${red}FAIL${reset} $name — died by signal $((status-128))"; FAIL=$((FAIL+1)); return
     fi
-    if printf '%s' "$out" | grep -Eq -- "$pattern"; then
+    if printf '%s' "$out" | LC_ALL=C.UTF-8 grep -Eq -- "$pattern"; then
         echo "${green}PASS${reset} $name"; PASS=$((PASS+1))
     else
         echo "${red}FAIL${reset} $name — no line matching [$pattern]"
@@ -67,7 +70,7 @@ shows() {
 # absent NAME PATTERN CMD... — the output does NOT match PATTERN.
 absent() {
     local name="$1" pattern="$2"; shift 2
-    if limited "$@" 2>&1 | plain | grep -Eq -- "$pattern"; then
+    if limited "$@" 2>&1 | plain | LC_ALL=C.UTF-8 grep -Eq -- "$pattern"; then
         echo "${red}FAIL${reset} $name — unexpected match [$pattern]"; FAIL=$((FAIL+1))
     else
         echo "${green}PASS${reset} $name"; PASS=$((PASS+1))