https://bugs.llvm.org/show_bug.cgi?id=33414
Bug ID: 33414
Summary: Clang goes into infinite loop during template
instantiation while processing co_await expression
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: lewissba...@gmail.com
CC: llvm-bugs@lists.llvm.org
Created attachment 18619
--> https://bugs.llvm.org/attachment.cgi?id=18619&action=edit
Preprocessed output of
Compile the attached preprocessor output with:
clang -x c++ -std=c++1z -fcoroutines-ts -fms-compatibility llvm_bug.ii
Seems to get stuck in an infinite loop inside
Sema::PerformPendingInstantiations().
It pulls a pending instantiation off the queue and calls
InstantiateFunctionDefinition().
However InstantiateFunctionDefinition() decides to defer instantiation (due to
late-parsed template?) and puts it back on the queue only to be picked up
immediately next time around the loop in PerformPendingInstantiations().
The particular template it is trying to instantiate is
coroutine_handle<task_promise>::promise() during compilation of a co_await
expression.
Built against code from github llvm-mirror:
llvm: 5db707b0ff5ce707a78082219658a999b6b6eaa3
clang: ff4214ddcfab9fd92c15cc01c9c2e17a8f6217ad
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