Disassembly differences

I have problems to save a value in a variable.

When I look at the disassembly code in the Disassembly Window in the Debugger it looks really weird to me. When I generate a disassembly from the axf with the fromelf command it makes much more sense to me.

The C code that interest me. When I run the code at the end the variable local_z  stores not the value 6 as expected instead 0.

uint32_t global_c ;
uint32_t *pglobal_c = &global_c;

void MX_FREERTOS_Init(void) {
    uint32_t local_c;
    uint32_t local_z;
    local_c = 5;
    local_c = 6;
    global_c = 6;
    local_z = global_c+local_c;
}

Assembly code from the Disassembly Window:

   126:         uint32_t local_c; 
   127:         uint32_t local_z; 
0x08004788 2002      MOVS          r0,#0x02
   128:         local_c = 5; 
0x0800478A 9002      STR           r0,[sp,#0x08]
   129:         local_c = 6; 

0x0800478C 2000      MOVS          r0,#0x00
   135:         global_c = 6; 
0x0800478E 9003      STR           r0,[sp,#0x0C]
0x08004790 2003      MOVS          r0,#0x03
0x08004792 9004      STR           r0,[sp,#0x10]
   136:         local_z = global_c+local_c; 
0x08004794 2005      MOVS          r0,#0x05
0x08004796 9005      STR           r0,[sp,#0x14]
0x08004798 A901      ADD           r1,sp,#0x04

Assembly code from the fromelf command:
To generate the assembler code I use the "fromelf $PIntellitraps_CPU_V1_0\%L --disassemble --interleave=source  --text -c --output=outfile.lst" command

;;;126    	uint32_t local_c;
;;;127    	uint32_t local_z;
;;;128    	local_c = 5;
        0x0800478a:    2505        .%      MOVS     r5,#5
;;;129    	local_c = 6;
        0x0800478c:    2506        .%      MOVS     r5,#6
;;;135    	global_c = 6;
        0x0800478e:    2006        .       MOVS     r0,#6
        0x08004790:    4904        .I      LDR      r1,[pc,#16] ; [0x80047a4] = 0x20000028
        0x08004792:    6008        .`      STR      r0,[r1,#0]
;;;136    	local_z = global_c+local_c;
        0x08004794:    4608        .F      MOV      r0,r1
        0x08004796:    6800        .h      LDR      r0,[r0,#0]
        0x08004798:    1944        D.      ADDS     r4,r0,r5

Can anybody explain to me why they are different and why the value don't get stored?

I use uVision V5.29 Professional with the ARM Compiler V5. The optimization Level is 0 and I compile for a STM32F7969NIHx.

Thank you in advance