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patch 9.1.1195: inside try-block: fn body executed with default arg undefined

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Problem:  inside try-block: fn body executed when default arg is
          undefined
Solution: When inside a try-block do not execute function body after an
          error in evaluating a default argument expression
          (Shane Harper).

closes: #16865

Signed-off-by: Shane Harper <shane@shaneharper.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Shane Harper
2025-03-12 21:12:12 +01:00
committed by Christian Brabandt
parent 7db96134c2
commit 2d18789aa6
3 changed files with 32 additions and 9 deletions
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37
src/testdir/test_user_func.vim
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@@ -161,14 +161,35 @@ func Test_default_arg()
\ execute('func Args2'))
" Error in default argument expression
let l =<< trim END
func F1(x = y)
return a:x * 2
endfunc
echo F1()
END
let @a = l->join("\n")
call assert_fails("exe @a", 'E121:')
func! s:f(x = s:undefined)
return a:x
endfunc
call assert_fails('echo s:f()', ['E121: Undefined variable: s:undefined',
\ 'E121: Undefined variable: a:x'])
func! s:f(x = s:undefined) abort
return a:x
endfunc
const expected_error = 'E121: Undefined variable: s:undefined'
" Only one error should be output; execution of the function should be aborted
" after the default argument expression error.
call assert_fails('echo s:f()', [expected_error, expected_error])
endfunc
func Test_default_argument_expression_error_while_inside_of_a_try_block()
func! s:f(v = s:undefined_variable)
let s:entered_fn_body = 1
return a:v
endfunc
unlet! s:entered_fn_body
try
call s:f()
throw "No exception."
catch
call assert_exception("E121: Undefined variable: s:undefined_variable")
endtry
call assert_false(exists('s:entered_fn_body'), "exists('s:entered_fn_body')")
endfunc
func s:addFoo(lead)