diff --git a/libc/log/oncrash.c b/libc/log/oncrash.c
index a978e882c..b22690e24 100644
--- a/libc/log/oncrash.c
+++ b/libc/log/oncrash.c
@@ -230,7 +230,7 @@ relegated void __oncrash(int sig, struct siginfo *si, ucontext_t *ctx) {
   int gdbpid, err;
   static bool once;
   err = errno;
-  if (once) abort();
+  if (once) _exit(119);
   once = true;
   /* TODO(jart): Needs translation for ucontext_t and possibly siginfo_t. */
   if (IsFreebsd() || IsOpenbsd()) ctx = NULL;
diff --git a/tool/build/lib/debug.c b/tool/build/lib/debug.c
index 51bfc2e84..bc613b9e3 100644
--- a/tool/build/lib/debug.c
+++ b/tool/build/lib/debug.c
@@ -17,10 +17,12 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
+#include "libc/calls/internal.h"
 #include "libc/calls/struct/stat.h"
 #include "libc/elf/elf.h"
 #include "libc/log/check.h"
 #include "libc/runtime/gc.h"
+#include "libc/stdio/stdio.h"
 #include "libc/sysv/consts/map.h"
 #include "libc/sysv/consts/o.h"
 #include "libc/sysv/consts/prot.h"
@@ -35,15 +37,14 @@ void LoadDebugSymbols(struct Elf *elf) {
   const char *path;
   if (elf->ehdr && GetElfSymbolTable(elf->ehdr, elf->size, &n) && n) return;
   DCHECK_NOTNULL(elf->prog);
-  fprintf(stderr, "HI %s\n", elf->prog);
-  if ((fd = open(gc(xstrcat(elf->prog, ".dbg")), O_RDONLY)) != -1 ||
-      (fd = open(elf->prog, O_RDONLY)) != -1) {
+  if ((fd = open(xstrcat(elf->prog, ".dbg"), O_RDONLY)) != -1) {
     if (fstat(fd, &st) != -1 &&
-        (elfmap = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)) !=
+        (elfmap = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0)) !=
             MAP_FAILED) {
       elf->ehdr = elfmap;
       elf->size = st.st_size;
     }
     close(fd);
   }
+  fprintf(stderr, "got here\n");
 }