What I expected to happen: The command (give @p 127 1) would work as intended
What actually happened: The game crashed.

Crash log is below.
---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 10/8/13 4:26 PM
Description: Adding item to inventory

java.lang.NullPointerException
at zi.g(SourceFile:151)
at zi.i(SourceFile:171)
at vd.a(SourceFile:234)
at tq.b_(SourceFile:199)
at vf.r(SourceFile:436)
at vf.e(SourceFile:428)
at pb.h(SourceFile:1194)
at vf.h(SourceFile:211)
at kq.i(SourceFile:204)
at kv.a(SourceFile:201)
at gs.a(SourceFile:136)
at eb.b(SourceFile:63)
at kv.e(SourceFile:69)
at ky.b(SourceFile:40)
at box.b(SourceFile:83)
at net.minecraft.server.MinecraftServer.u(SourceFile:494)
at net.minecraft.server.MinecraftServer.t(SourceFile:411)
at bou.t(SourceFile:121)
at net.minecraft.server.MinecraftServer.run(SourceFile:346)
at jc.run(SourceFile:582)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at zi.g(SourceFile:151)
at zi.i(SourceFile:171)

– Item being added –
Details:
Item ID: 0
Item data: 0
Item name: ~_ERROR~ NullPointerException: null
Stacktrace:
at vd.a(SourceFile:234)
at tq.b_(SourceFile:199)
at vf.r(SourceFile:436)
at vf.e(SourceFile:428)
at pb.h(SourceFile:1194)
at vf.h(SourceFile:211)

– Player being ticked –
Details:
Entity Type: null (kq)
Entity ID: 0
Entity Name: DevEd2
Entity's Exact location: -338.98, 56.00, -972.64
Entity's Block location: World: (-339,56,-973), Chunk: (at 13,3,3 in -22,-61; contains blocks -352,0,-976 to -337,255,-961), Region: (-1,-2; contains chunks -32,-64 to -1,-33, blocks -512,0,-1024 to -1,255,-513)
Entity's Momentum: 0.00, -0.08, 0.00
Stacktrace:
at kq.i(SourceFile:204)
at kv.a(SourceFile:201)
at gs.a(SourceFile:136)
at eb.b(SourceFile:63)
at kv.e(SourceFile:69)

– Ticking connection –
Details:
Connection: kv@56783b10
Stacktrace:
at ky.b(SourceFile:40)
at box.b(SourceFile:83)
at net.minecraft.server.MinecraftServer.u(SourceFile:494)
at net.minecraft.server.MinecraftServer.t(SourceFile:411)
at bou.t(SourceFile:121)
at net.minecraft.server.MinecraftServer.run(SourceFile:346)
at jc.run(SourceFile:582)

– System Details –
Details:
Minecraft Version: 13w39b
Operating System: Mac OS X (x86_64) version 10.8.4
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 65596488 bytes (62 MB) / 176472064 bytes (168 MB) up to 1144913920 bytes (1091 MB)
JVM Flags: 1 total; -Xmx1096M
AABB Pool Size: 261 (14616 bytes; 0 MB) allocated, 174 (9744 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Profiler Position: N/A (disabled)
Vec3 Pool Size: 39 (2184 bytes; 0 MB) allocated, 28 (1568 bytes; 0 MB) used
Player Count: 1 / 8; [kq['DevEd2'/0, l='Secret Staircase attempt', x=-338.98, y=56.00, z=-972.64]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.