Alignment trap with some QML

Some qml files crashes with the following message :

Alignment trap: not handling instruction f9440adf at [<b679c114>]

Unhandled fault: alignment exception (0x801) at 0xb2429e1c

At first, I though the fix for QTBUG-55561 was the problem, but no.

qtdeclarative/tests/manual/scenegraph_lancelot/data/images/linear_smooth_1_0.qml works, but not QtTest/TestCase.qml.
The attached qml file is the smallest buggy qml I could create.

Full gdb debug :

(gdb) run
Starting program: /sampleanim
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
[New Thread 0xb37be450 (LWP 202)]
[New Thread 0xb2fbe450 (LWP 203)]
[ 408.327153] Alignment trap: not handling instruction f9440adf at [<b679c114>]
[ 408.342141] Unhandled fault: alignment exception (0x801) at 0xb2429e1c

Program received signal SIGBUS, Bus error.
[Switching to Thread 0xb2fbe450 (LWP 203)]
0xb679c118 in QV4::Compiler::JSUnitGenerator::writeFunction(char*, QV4::IR::Function*) const () from /usr/local/qt5/lib/libQt5Qml.so.5

(gdb) x/i $pc
=> 0xb679c118 <_ZNK3QV48Compiler15JSUnitGenerator13writeFunctionEPcPNS_2IR8FunctionE+248>: orr.w r0, r0, r9, lsl #20
(gdb) info frame
Stack level 0, frame at 0xb2fbd7b0:
pc = 0xb679c118
in QV4::Compiler::JSUnitGenerator::writeFunction(char*, QV4::IR::Function*) const; saved pc = 0xb679ca08
called by frame at 0xb2fbd898
Arglist at 0xb2fbd790, args:
Locals at 0xb2fbd790, Previous frame's sp is 0xb2fbd7b0
Saved registers:
r4 at 0xb2fbd790, r5 at 0xb2fbd794, r6 at 0xb2fbd798, r7 at 0xb2fbd79c,
r8 at 0xb2fbd7a0, r9 at 0xb2fbd7a4, r10 at 0xb2fbd7a8, lr at 0xb2fbd7ac