[LLVMbugs] [Bug 20402] New: Assertion failed: (StateMapsArray[Block->getBlockID()] && "Block has no block info"), function borrowInfo, file tools/clang/lib/Analysis/Consumed.cpp, line 1080.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20402

            Bug ID: 20402
           Summary: Assertion failed: (StateMapsArray[Block->getBlockID()]
                    && "Block has no block info"), function borrowInfo,
                    file tools/clang/lib/Analysis/Consumed.cpp, line 1080.
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dimitry at andric.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

This assertion was reported by Benjamin Kaduk here:
http://lists.freebsd.org/pipermail/freebsd-current/2014-July/051348.html

I reduced the test case to this very short .c file, which reproduces the
assertion with clang trunk r213143:

$ cat testcase.c
a;
GetToken() {
S1:
  switch (a)
  case ' ':
  goto S1;
  goto S1;
}
static
$ clang -v
clang version 3.5.0 (trunk 213143)
Target: x86_64-unknown-freebsd11.0
Thread model: posix
$ clang -cc1 -triple x86_64-unknown-freebsd11.0 -emit-obj -Wconsumed testcase.c
clang -cc1 -triple x86_64-unknown-freebsd11.0 -emit-obj -Wconsumed testcase.c
testcase.c:1:1: warning: type specifier missing, defaults to 'int'
a;
^
testcase.c:2:1: warning: type specifier missing, defaults to 'int'
GetToken() {
^~~~~~~~
Assertion failed: (StateMapsArray[Block->getBlockID()] && "Block has no block
info"), function borrowInfo, file
/share/dim/src/llvm/trunk/tools/clang/lib/Analysis/Consumed.cpp, line 1080.
Stack dump:
0.    Program arguments:
/share/dim/llvm/213143-trunk-freebsd11-amd64-aconf-rel-2/bin/clang -cc1 -triple
x86_64-unknown-freebsd11.0 -emit-obj -Wconsumed testcase.c
1.    testcase.c:9:1: current parser token 'static'
2.    testcase.c:2:12: parsing function body 'GetToken'
Abort trap

Obviously, a workaround is to remove -Wconsumed, but this warning was not
explicitly enabled the original reporter; he was using -Weverything.

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