https://llvm.org/bugs/show_bug.cgi?id=28904
Bug ID: 28904
Summary: -Wexceptions fails to emit for "will be caught by
earlier handler" when using aliases
Product: clang
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: bloerw...@googlemail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 16911
--> https://llvm.org/bugs/attachment.cgi?id=16911&action=edit
reproducing source as file
-Wexceptions can detect duplicate `catch`es (e.g. catching int twice), but
fails to do so when using aliasing and aliased types mixed:
$ cat tmp.cpp
typedef int int_;
int main (int, char**) {
try {
throw 1;
}
catch (FIRST) {
return __LINE__;
}
catch (SECOND) {
return __LINE__;
}
return __LINE__;
}
$ for first in int int_; do \
for second in int int_; do \
echo $first $second \
$(clang++ -Weverything tmp.cpp -DFIRST=$first -DSECOND=$second 2>&1 |
wc -l) \
$(./a.out; echo $?); \
done; done
int int 13 7
int int_ 0 7
int_ int 0 7
int_ int_ 13 7
Only the case with the same name is detected (first and last). Note that all
combinations correctly call the first `catch` (line 7).
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