debug.traceCall fails

[baptiste-b-pegasys]

System information

Geth version: geth version OS & Version: Windows/Linux/OSX Commit hash : (if develop)

Expected behaviour

no error

Actual behaviour

error returned

> debug.traceCall(null, "0x0")
Error: method handler crashed
        at web3.js:6355:37(47)
        at web3.js:5089:62(37)
        at <eval>:1:16(5)

Steps to reproduce the behaviour

launch a debug.traceCall

Backtrace

[backtrace]

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