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builtin: fix undefined read s[0], from ''.is_lower() and ''.is_upper() in c7af2c2

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Delyan Angelov 2024-04-26 17:03:57 +03:00
parent c7af2c21d1
commit d66de0c514
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1 changed files with 2 additions and 2 deletions
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4
vlib/builtin/string.v
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@ -1524,7 +1524,7 @@ pub fn (s string) to_lower() string {
// Example: assert 'hello developer'.is_lower() == true // Example: assert 'hello developer'.is_lower() == true
@[direct_array_access] @[direct_array_access]
pub fn (s string) is_lower() bool { pub fn (s string) is_lower() bool {
if s[0].is_digit() { if s.len > 0 && s[0].is_digit() {
return false return false
} }
for i in 0 .. s.len { for i in 0 .. s.len {
@ -1558,7 +1558,7 @@ pub fn (s string) to_upper() string {
// Example: assert 'HELLO V'.is_upper() == true // Example: assert 'HELLO V'.is_upper() == true
@[direct_array_access] @[direct_array_access]
pub fn (s string) is_upper() bool { pub fn (s string) is_upper() bool {
if s[0].is_digit() { if s.len > 0 && s[0].is_digit() {
return false return false
} }
for i in 0 .. s.len { for i in 0 .. s.len {