http://llvm.org/bugs/show_bug.cgi?id=20715
Bug ID: 20715
Summary: llvm::format() prints incorrect values for %ul
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Support Libraries
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Example code:
StringRef lol="hi";
dbgs()<< format("%s %lu",lol, 1)<<"\n";
Expected Output:
hi 1
Actual Output:
hi 2
In general the number printed out will be some arbitrary number around the
range of 0-40 rather than the actual value of the argument given.
The bug is not present with format strings %d and %u, but still is present with
%llu. If the %s is not present before the %ul, I wasn't able to reproduce the
bug, but I didn't try very hard.
Luckily in my use case it was obvious that the values printed were wrong, but
this could potentially cause tools using format() to give extremely misleading
output.
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