Loops with a single iteration start tracing, but never complete since we immediately walk past the loop edge after the first iteration. At least try to complete the loop around it by walking past such thin inner loops when compiling the outer loop (452362).

js/src/jstracer.cpp

@@ -80,7 +80,7 @@
 #define MAX_MISMATCH 5
 
 /* Max number of loop edges to follow. */
-#define MAX_OUTERLINE 0
+#define MAX_OUTERLINE 1
 
 /* Max native stack size. */
 #define MAX_NATIVE_STACK_SLOTS 1024