[llvm-bugs] [Bug 41964] New: clang-format: crash with SIGFPE when TabWidth is set to 0 and line starts with tab

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41964

            Bug ID: 41964
           Summary: clang-format: crash with SIGFPE when TabWidth is set
                    to 0 and line starts with tab
           Product: clang
           Version: 8.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: mateusz.szychowski at blackstarsoftware.com
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

clang-format 8.0 crashes with SIGFPE (floating point exception) when formatting
following file:
app.cpp:
void a() {
        //line starts with '\t'
}

$ clang-format -style='{TabWidth: 0}' app.cpp
Stack dump:
0.      Program arguments: clang-format -style={TabWidth: 0} app.cpp 
/lib/x86_64-linux-gnu/libLLVM-8.so.1(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x1f)[0x7f25b84aadff]
/lib/x86_64-linux-gnu/libLLVM-8.so.1(_ZN4llvm3sys17RunSignalHandlersEv+0x50)[0x7f25b84a9250]
/lib/x86_64-linux-gnu/libLLVM-8.so.1(+0x976208)[0x7f25b84ab208]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x13f40)[0x7f25bb789f40]
clang-format[0x46419c]
clang-format[0x463d48]
clang-format[0x439e0a]
clang-format[0x43191c]
clang-format[0x42402b]
clang-format[0x424773]
clang-format[0x40c757]
clang-format[0x40ba14]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7f25b7627b6b]
clang-format[0x40b50a]
Floating point exception (core dumped)

reproduced on:
Manjaro Linux (Linux 5.1.1-2-MANJARO)
Arch Linux Docker Image
Ubuntu 19.04 Docker Image
Ubuntu 18.04 (with clang-format 7)

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