The tinderbox problem was due to insufficient STARTUP_TMBUFSIZE, so re-increase the buffer size to 64K (from 16K) and comment out my debugging code.

tools/trace-malloc/lib/nsTraceMalloc.c

@@ -274,7 +274,7 @@ struct AllocationFuncs
 
 typedef struct logfile logfile;
 
-#define STARTUP_TMBUFSIZE (16 * 1024)
+#define STARTUP_TMBUFSIZE (64 * 1024)
 #define LOGFILE_TMBUFSIZE (16 * 1024)
 
 struct logfile {

tools/trace-malloc/tmreader.c

@@ -56,7 +56,7 @@
 #include "nsTraceMalloc.h"
 #include "tmreader.h"
 
-#define DEBUG_tmreader
+#undef  DEBUG_tmreader
 
 static int accum_byte(FILE *fp, uint32 *uip)
 {