// RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
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// RUN: FileCheck %s < %t.out
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// RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&1
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// RUN: FileCheck %s < %t.out
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// This test relies on realloc from 100 to 101 being done in-place.
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#include <stdlib.h>
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int main(int argc, char **argv) {
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char *p = (char *)malloc(100);
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p = (char *)realloc(p, 101);
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char x = p[100];
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free(p);
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return x;
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: {{#0 0x.* in main .*realloc-origin.cc:}}[[@LINE-2]]
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// CHECK: Uninitialized value was created by a heap allocation
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// CHECK: {{#0 0x.* in .*realloc}}
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// CHECK: {{#1 0x.* in main .*realloc-origin.cc:}}[[@LINE-9]]
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}
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