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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Can't fully activate -Wconsumed using #pragma clang diagnostic"
href="https://bugs.llvm.org/show_bug.cgi?id=42854">42854</a>
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<th>Summary</th>
<td>Can't fully activate -Wconsumed using #pragma clang diagnostic
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>comexk@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>If you activate -Wconsumed using a pragma rather than on the command line, it
seemingly doesn't trigger the consumed analysis pass.
Given the following example code:
---
#pragma clang diagnostic error "-Wconsumed"
struct [[clang::consumable(unconsumed)]] Linear {
[[clang::return_typestate(unconsumed)]]
Linear() {}
[[clang::callable_when(consumed)]]
~Linear() {}
};
void a() {
Linear l;
}
---
Compiling the code as is, without passing -Wconsumed on the command line, I get
no warnings or errors.
The pragma does enable -Wconsumed warnings about malformed declarations: if I
e.g. comment out the consumable attribute on Linear, I get:
<span class="quote">> error: consumed analysis attribute is attached to member of class 'Linear' which isn't marked as consumable [-Werror,-Wconsumed]</span >
However, without commenting anything out, I expect this diagnostic from a():
<span class="quote">> error: invalid invocation of method '~Linear' on object 'l' while it is in the 'unconsumed' state [-Werror,-Wconsumed]</span >
I get this if and only if I pass -Wconsumed on the command line.
Tested on Compiler Explorer's "x86-64 clang (trunk)".</pre>
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