https://llvm.org/bugs/show_bug.cgi?id=25151
Bug ID: 25151
Summary: obj-c generics does not warn when using wrong type in
the 'for-in' loop
Product: clang
Version: unspecified
Hardware: PC
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: mayer.jul...@googlemail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
obj-c lightweight generics does not warn when using wrong type in the 'for-in'
loop
even when using -Wall -Wextra, this compiles without warning with
Apple LLVM version 7.0.0 (clang-700.0.72) - but of course crashes at runtime:
NSMutableArray <NSString *> *stringArray = @[@"aa", @"ab"].mutableCopy;
for (NSURL *url in stringArray) // we should get a warning here because
stringArray contains NSStrings and not NSURLs
{
NSLog(@"%@", url.path); // we get a crash here because 'url' really a
NSString and doesn't respond to 'path'
}
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