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Bug #4953

Frame is not displayed when backing buffer is not available

Added by Stanislav Lomany almost 6 years ago. Updated almost 6 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Target version:
-
Start date:
10/09/2020
Due date:
% Done:

0%

billable:
No
vendor_id:
GCD
case_num:
version_reported:
version_resolved:
reviewer:
production:
No
env_name:
topics:

History

#1 Updated by Stanislav Lomany almost 6 years ago

Testcase:

def temp-table tt1 field f1 as integer field f2 as integer.

create tt1.
release tt1.

def var dummy as integer.
display tt1.f1
        tt1.f2 + 10 @ dummy
with frame fr no-error.

wait-for close of current-window.

4GL: frame is displayed with "?" instead of values.
FWD: frame is not displayed.

Couple of thoughts:
  1. Comment in Element.get() states that "Accessing not-available fields is normally reported by P4GL as error 91." which is caught, but in my testcase it had no error code and therefore the frame is just not displayed.
  2. Complex expressions are emitted using Element, not HeaderElement: new Element(plus(tt1.getF2(), 10) ...) so there's no place to catch the error and the frame is not displayed again.

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