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diff -up vim82/src/errors.h.cve1420 vim82/src/errors.h
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--- vim82/src/errors.h.cve1420 2022-04-25 16:01:03.559985019 +0200
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+++ vim82/src/errors.h 2022-04-25 16:01:58.113332024 +0200
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@@ -383,3 +383,7 @@ EXTERN char e_cannot_use_default_values_
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INIT(= N_("E1172: Cannot use default values in a lambda"));
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EXTERN char e_resulting_text_too_long[]
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INIT(= N_("E1240: Resulting text too long"));
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+#ifdef FEAT_EVAL
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+EXTERN char e_string_or_function_required_for_arrow_parens_expr[]
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+ INIT(= N_("E1275: String or function required for ->(expr)"));
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+#endif
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diff -up vim82/src/eval.c.cve1420 vim82/src/eval.c
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--- vim82/src/eval.c.cve1420 2022-04-25 16:01:03.560985007 +0200
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+++ vim82/src/eval.c 2022-04-25 16:14:11.746600369 +0200
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@@ -3718,13 +3718,20 @@ eval_lambda(
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if (**arg != ')')
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{
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emsg(_(e_missing_close));
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- ret = FAIL;
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+ return FAIL;
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+ }
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+ if (rettv->v_type != VAR_STRING && rettv->v_type != VAR_FUNC
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+ && rettv->v_type != VAR_PARTIAL)
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+ {
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+ emsg(_(e_string_or_function_required_for_arrow_parens_expr));
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+ return FAIL;
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}
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++*arg;
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}
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if (ret != OK)
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return FAIL;
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- else if (**arg != '(')
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+
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+ if (**arg != '(')
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{
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if (verbose)
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{
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diff -up vim82/src/testdir/test_lambda.vim.cve1420 vim82/src/testdir/test_lambda.vim
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--- vim82/src/testdir/test_lambda.vim.cve1420 2022-04-25 16:01:03.560985007 +0200
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+++ vim82/src/testdir/test_lambda.vim 2022-04-25 16:17:01.694886566 +0200
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@@ -64,6 +64,10 @@ function Test_lambda_fails()
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call assert_fails('echo {a, a -> a + a}(1, 2)', 'E853:')
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call assert_fails('echo {a, b -> a + b)}(1, 2)', 'E451:')
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echo assert_fails('echo 10->{a -> a + 2}', 'E107:')
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+ call assert_fails('eval 0->(3)()', "E1275:")
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+ call assert_fails('eval 0->([3])()', "E1275:")
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+ call assert_fails('eval 0->({"a": 3})()', "E1275:")
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+ call assert_fails('eval 0->(xxx)()', "E121:")
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endfunc
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func Test_not_lamda()
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