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patch 9.0.1796: Vim9 problems with null_objects

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Problem:  Vim9 problems with null_objects
Solution: Vim9 improve null_object usage

Fix "xvar == null", where xvar might have been assigned null_object.

Fix compilation failure: "var o2: C = null_object".

closes: #12890

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Ernie Rael <errael@raelity.com>
This commit is contained in:
Ernie Rael
2023-08-27 18:40:26 +02:00
committed by Christian Brabandt
parent d4e4ecbb37
commit 5c018bee0e
7 changed files with 54 additions and 4 deletions
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4
src/vim9compile.c
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@@ -2299,6 +2299,9 @@ push_default_value(
case VAR_CHANNEL:
r = generate_PUSHCHANNEL(cctx);
break;
case VAR_OBJECT:
r = generate_PUSHOBJ(cctx);
break;
case VAR_NUMBER:
case VAR_UNKNOWN:
case VAR_ANY:
@@ -2306,7 +2309,6 @@ push_default_value(
case VAR_VOID:
case VAR_INSTR:
case VAR_CLASS:
case VAR_OBJECT:
case VAR_SPECIAL: // cannot happen
// This is skipped for local variables, they are always
// initialized to zero. But in a "for" or "while" loop