Michael Troß writes: Yes, the missing initialization of uniqblock seems to cause all this trouble. Now gen_wctype works without the rlimit stack hack.

extra/locale/gen_wctype.c

@@ -8,10 +8,6 @@
 #include <wchar.h>
 #include <ctype.h>
 
-#ifdef __linux__
-#include <sys/resource.h>
-#endif
-
 #ifndef _CTYPE_H
 #define _CTYPE_H
 #endif
@@ -245,14 +241,6 @@ int main(int argc, char **argv)
 	static const char empty_slot[] = "empty_slot";
 	int built = 0;
 
-#ifdef __linux__
-	struct rlimit limit;
-
-	limit.rlim_max = RLIM_INFINITY;
-	limit.rlim_cur = RLIM_INFINITY;
-	setrlimit(RLIMIT_STACK, &limit);
-#endif
-
 #define INIT_TYPENAME(X) typename[__CTYPE_##X] = "C_" #X
 
 	for (i=0 ; i < 16 ; i++) {