Seg Fault in 4.0.2 when compiling with GNU

[jdha]

While the Cray compiler appears to work fine with the 4.0.2 code, when compiling with the GNU compiler the model fails with a Seg Fault relating to unallocated memory.

This issue arises in the AR5 diagnostics, when they are not selected! Which is a little odd - and probably worth investigating further.

Patch to fix in diaar5.F90:

87,88d86
<       IF(lwp) WRITE(numout,*) 'l_ar5 is ', l_ar5
<
98,103c96
<       ! JDHA: area is never allocated if l_ar5 is FALSE. Inserting IF
<       ! CALL iom_put( 'areacello', area(:,:) )
<       IF( l_ar5 ) THEN
<          CALL iom_put( 'areacello', area(:,:) )
<       ENDIF
<       ! JDHA: end inserting IF
---
>       CALL iom_put( 'areacello', area(:,:) )

[jdha]

Once patch applied check:

• code compiles and runs with GNU
• code still compiles and runs with Cray
• addition of ar5 diagnostics works as before