Minor - P4 running cd() function on the shell produced the following stack trace:
> cd
function cd() { [native code] }
> cd()
Mon Mar 11 09:38:08.331 Assertion: 13111:field not found, expected type 2
0x102b04e6b 0x102ae36be 0x102ae377d 0x102a2b571 0x102a2b5f9 0x102a2d936 0x102ac84e0 0x102ac713d 0x102bc4a40 0x33e29f306362
0 mongo 0x0000000102b04e6b _ZN5mongo15printStackTraceERSo + 43
1 mongo 0x0000000102ae36be _ZN5mongo11msgassertedEiPKc + 174
2 mongo 0x0000000102ae377d _ZN5mongo11msgassertedEiRKSs + 29
3 mongo 0x0000000102a2b571 _ZNK5mongo11BSONElement3chkEi + 793
4 mongo 0x0000000102a2b5f9 _ZNK5mongo11BSONElement6StringEv + 41
5 mongo 0x0000000102a2d936 _ZN5mongo11shell_utils2cdERKNS_7BSONObjEPv + 102
6 mongo 0x0000000102ac84e0 _ZN5mongo7V8Scope14nativeCallbackEPS0_RKN2v89ArgumentsE + 680
7 mongo 0x0000000102ac713d _ZN5mongo7V8Scope10v8CallbackERKN2v89ArgumentsE + 123
8 mongo 0x0000000102bc4a40 _ZN2v88internalL21Builtin_HandleApiCallENS0_12_GLOBAL__N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE + 464
9 ??? 0x000033e29f306362 0x0 + 57048426373986
Mon Mar 11 09:38:08.337 JavaScript execution failed: Error: field not found, expected type 2
The mkdir() function has the same problem.
These functions should throw a UserAssertion on a failure to validate their input arguments, resulting in a JavaScript exceptiojn that can be trapped by user code. They should not print a stack trace.