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Valgrind report #1437

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aspcartman opened this issue Mar 20, 2015 · 2 comments
Closed

Valgrind report #1437

aspcartman opened this issue Mar 20, 2015 · 2 comments

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@aspcartman
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So I just did a cargo new and changed main.rs as:

fn main() {
}

The output of valgrind target/debug/HelloWorld:

==38935== Memcheck, a memory error detector
==38935== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==38935== Using Valgrind-3.11.0.SVN and LibVEX; rerun with -h for copyright info
==38935== Command: ./target/debug/HelloWorld
==38935==
==38935==
==38935== HEAP SUMMARY:
==38935==     in use at exit: 35,513 bytes in 424 blocks
==38935==   total heap usage: 510 allocs, 86 frees, 41,921 bytes allocated
==38935==
==38935== LEAK SUMMARY:
==38935==    definitely lost: 0 bytes in 0 blocks
==38935==    indirectly lost: 0 bytes in 0 blocks
==38935==      possibly lost: 0 bytes in 0 blocks
==38935==    still reachable: 104 bytes in 1 blocks
==38935==         suppressed: 35,409 bytes in 423 blocks
==38935== Rerun with --leak-check=full to see details of leaked memory
==38935==
==38935== For counts of detected and suppressed errors, rerun with: -v
==38935== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

Thus everything is ok.

But valgrind cargo run:

==38953== Memcheck, a memory error detector
==38953== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==38953== Using Valgrind-3.11.0.SVN and LibVEX; rerun with -h for copyright info
==38953== Command: cargo run
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x1000D9481: util::config::Config$LT$$u27$a$GT$::values::hc58fb9281611baafBjr (in /usr/local/bin/cargo)
==38953==    by 0x1000E2BC2: util::config::Config$LT$$u27$a$GT$::get::h4e81b6b51c9ad599vkr (in /usr/local/bin/cargo)
==38953==    by 0x1000E0BDE: util::config::Config$LT$$u27$a$GT$::get_string::h185429cf45f7e79cXnr (in /usr/local/bin/cargo)
==38953==    by 0x10019BA05: ops::registry::http_proxy::h1facd5b63b794beb4co (in /usr/local/bin/cargo)
==38953==    by 0x10019BEAF: ops::registry::http_proxy_exists::hbd93100c21213085eeo (in /usr/local/bin/cargo)
==38953==    by 0x100006FC4: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==    by 0x100001C86: main::h86f1470dea54a8b6jca (in /usr/local/bin/cargo)
==38953==    by 0x1003B97C8: rust_try_inner (in /usr/local/bin/cargo)
==38953==    by 0x100001153: (below main) (in /usr/local/bin/cargo)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x1000D9889: util::config::Config$LT$$u27$a$GT$::values::hc58fb9281611baafBjr (in /usr/local/bin/cargo)
==38953==    by 0x1000E2BC2: util::config::Config$LT$$u27$a$GT$::get::h4e81b6b51c9ad599vkr (in /usr/local/bin/cargo)
==38953==    by 0x1000E0BDE: util::config::Config$LT$$u27$a$GT$::get_string::h185429cf45f7e79cXnr (in /usr/local/bin/cargo)
==38953==    by 0x10019BA05: ops::registry::http_proxy::h1facd5b63b794beb4co (in /usr/local/bin/cargo)
==38953==    by 0x10019BEAF: ops::registry::http_proxy_exists::hbd93100c21213085eeo (in /usr/local/bin/cargo)
==38953==    by 0x100006FC4: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==    by 0x100001C86: main::h86f1470dea54a8b6jca (in /usr/local/bin/cargo)
==38953==    by 0x1003B97C8: rust_try_inner (in /usr/local/bin/cargo)
==38953==    by 0x100001153: (below main) (in /usr/local/bin/cargo)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x100C80C7A: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F5FB: ssleay_rand_add (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10079900A: RAND_poll (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070EE6B: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F6DA: ssleay_rand_pseudo_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C196C: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==
==38953== Invalid read of size 32
==38953==    at 0x100C80C1D: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F5FB: ssleay_rand_add (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10079903A: RAND_poll (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070EE6B: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F6DA: ssleay_rand_pseudo_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C196C: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==  Address 0x1064c18c0 is 16 bytes after a block of size 112 in arena "client"
==38953==
==38953== Invalid read of size 32
==38953==    at 0x100C80C6A: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F5FB: ssleay_rand_add (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10079903A: RAND_poll (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070EE6B: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F6DA: ssleay_rand_pseudo_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C196C: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==  Address 0x1064c1960 is 8 bytes after a block of size 104 alloc'd
==38953==    at 0x1005796C1: malloc (vg_replace_malloc.c:303)
==38953==    by 0x100724DF3: CRYPTO_malloc (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EA96: EVP_DigestInit_ex (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F4DC: ssleay_rand_add (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10079903A: RAND_poll (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070EE6B: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F6DA: ssleay_rand_pseudo_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C196C: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x100C80C9F: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F5FB: ssleay_rand_add (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070EEEF: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F6DA: ssleay_rand_pseudo_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C196C: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x1002F4586: git_libgit2_init (in /usr/local/bin/cargo)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x100C80C7A: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F1E9: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F6DA: ssleay_rand_pseudo_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C196C: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x1002F4586: git_libgit2_init (in /usr/local/bin/cargo)
==38953==    by 0x100266F7B: init::hd962b8d8efefe9eagmk (in /usr/local/bin/cargo)
==38953==
==38953== Invalid read of size 32
==38953==    at 0x100C80C1D: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F1E9: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C1985: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x1002F4586: git_libgit2_init (in /usr/local/bin/cargo)
==38953==    by 0x100266F7B: init::hd962b8d8efefe9eagmk (in /usr/local/bin/cargo)
==38953==    by 0x10026C5BA: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==  Address 0x1064c3f40 is 16 bytes after a block of size 112 in arena "client"
==38953==
==38953== Invalid read of size 32
==38953==    at 0x100C80C6A: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1007956C2: OPENSSL_cleanse (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EC69: EVP_MD_CTX_cleanup (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F1E9: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C1985: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x1002F4586: git_libgit2_init (in /usr/local/bin/cargo)
==38953==    by 0x100266F7B: init::hd962b8d8efefe9eagmk (in /usr/local/bin/cargo)
==38953==    by 0x10026C5BA: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==  Address 0x1064c3fe0 is 8 bytes after a block of size 104 alloc'd
==38953==    at 0x1005796C1: malloc (vg_replace_malloc.c:303)
==38953==    by 0x100724DF3: CRYPTO_malloc (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10073EA96: EVP_DigestInit_ex (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x10070F029: ssleay_rand_bytes (in /usr/lib/libcrypto.0.9.8.dylib)
==38953==    by 0x1006C1985: SSL_CTX_new (in /usr/lib/libssl.0.9.8.dylib)
==38953==    by 0x1002F4610: init_once (in /usr/local/bin/cargo)
==38953==    by 0x100C93AF3: __pthread_once_handler (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x100C82F12: _os_once (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x100C93A92: pthread_once (in /usr/lib/system/libsystem_pthread.dylib)
==38953==    by 0x1002F4586: git_libgit2_init (in /usr/local/bin/cargo)
==38953==    by 0x100266F7B: init::hd962b8d8efefe9eagmk (in /usr/local/bin/cargo)
==38953==    by 0x10026C5BA: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==
==38953== Invalid read of size 32
==38953==    at 0x100C80C1D: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1002E9423: parse_variable (in /usr/local/bin/cargo)
==38953==    by 0x1002E8A0E: config_parse (in /usr/local/bin/cargo)
==38953==    by 0x1002E7442: config_open (in /usr/local/bin/cargo)
==38953==    by 0x1002E5456: git_config_add_backend (in /usr/local/bin/cargo)
==38953==    by 0x1002E53B9: git_config_add_file_ondisk (in /usr/local/bin/cargo)
==38953==    by 0x1002E6D57: git_config_open_default (in /usr/local/bin/cargo)
==38953==    by 0x10026C5CB: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==    by 0x10019BAA3: ops::registry::http_proxy::h1facd5b63b794beb4co (in /usr/local/bin/cargo)
==38953==    by 0x10019BEAF: ops::registry::http_proxy_exists::hbd93100c21213085eeo (in /usr/local/bin/cargo)
==38953==    by 0x100006FC4: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==  Address 0x1064c5780 is 16 bytes after a block of size 32 alloc'd
==38953==    at 0x1005796C1: malloc (vg_replace_malloc.c:303)
==38953==    by 0x10057A5AC: realloc (vg_replace_malloc.c:699)
==38953==    by 0x1002E9872: kh_resize_str (in /usr/local/bin/cargo)
==38953==    by 0x1002E8C63: config_parse (in /usr/local/bin/cargo)
==38953==    by 0x1002E7442: config_open (in /usr/local/bin/cargo)
==38953==    by 0x1002E5456: git_config_add_backend (in /usr/local/bin/cargo)
==38953==    by 0x1002E53B9: git_config_add_file_ondisk (in /usr/local/bin/cargo)
==38953==    by 0x1002E6D57: git_config_open_default (in /usr/local/bin/cargo)
==38953==    by 0x10026C5CB: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==    by 0x10019BAA3: ops::registry::http_proxy::h1facd5b63b794beb4co (in /usr/local/bin/cargo)
==38953==    by 0x10019BEAF: ops::registry::http_proxy_exists::hbd93100c21213085eeo (in /usr/local/bin/cargo)
==38953==    by 0x100006FC4: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==
==38953== Invalid read of size 32
==38953==    at 0x100C80C21: _platform_memchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38953==    by 0x1002E9423: parse_variable (in /usr/local/bin/cargo)
==38953==    by 0x1002E8A0E: config_parse (in /usr/local/bin/cargo)
==38953==    by 0x1002E7442: config_open (in /usr/local/bin/cargo)
==38953==    by 0x1002E5456: git_config_add_backend (in /usr/local/bin/cargo)
==38953==    by 0x1002E53B9: git_config_add_file_ondisk (in /usr/local/bin/cargo)
==38953==    by 0x1002E6D57: git_config_open_default (in /usr/local/bin/cargo)
==38953==    by 0x10026C5CB: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==    by 0x10019BAA3: ops::registry::http_proxy::h1facd5b63b794beb4co (in /usr/local/bin/cargo)
==38953==    by 0x10019BEAF: ops::registry::http_proxy_exists::hbd93100c21213085eeo (in /usr/local/bin/cargo)
==38953==    by 0x100006FC4: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==  Address 0x1064c60a0 is 15 bytes after a block of size 17 alloc'd
==38953==    at 0x1005796C1: malloc (vg_replace_malloc.c:303)
==38953==    by 0x1002E9ACC: reader_readline (in /usr/local/bin/cargo)
==38953==    by 0x1002E9315: parse_variable (in /usr/local/bin/cargo)
==38953==    by 0x1002E8A0E: config_parse (in /usr/local/bin/cargo)
==38953==    by 0x1002E7442: config_open (in /usr/local/bin/cargo)
==38953==    by 0x1002E5456: git_config_add_backend (in /usr/local/bin/cargo)
==38953==    by 0x1002E53B9: git_config_add_file_ondisk (in /usr/local/bin/cargo)
==38953==    by 0x1002E6D57: git_config_open_default (in /usr/local/bin/cargo)
==38953==    by 0x10026C5CB: config::Config::open_default::h3b1150b57d574761Afd (in /usr/local/bin/cargo)
==38953==    by 0x10019BAA3: ops::registry::http_proxy::h1facd5b63b794beb4co (in /usr/local/bin/cargo)
==38953==    by 0x10019BEAF: ops::registry::http_proxy_exists::hbd93100c21213085eeo (in /usr/local/bin/cargo)
==38953==    by 0x100006FC4: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x100108CC3: util::toml::project_layout::h580a3f7882e4773alCt (in /usr/local/bin/cargo)
==38953==    by 0x100107A94: ops::cargo_read_manifest::read_package::h4ec747e6eb698153PVi (in /usr/local/bin/cargo)
==38953==    by 0x10010CD19: ops::cargo_read_manifest::read_nested_packages::hb7d38cd507fd72ecF9i (in /usr/local/bin/cargo)
==38953==    by 0x10010B1C9: ops::cargo_read_manifest::walk::h14038966357734740614 (in /usr/local/bin/cargo)
==38953==    by 0x100109929: ops::cargo_read_manifest::read_packages::h387dbe9f6b94c3ae7Yi (in /usr/local/bin/cargo)
==38953==    by 0x1001A8817: sources::path::PathSource$LT$$u27$a$C$$u20$$u27$b$GT$::read_packages::ha076dd41b670c48aoTo (in /usr/local/bin/cargo)
==38953==    by 0x10010F8DE: ops::cargo_run::run::h5ac0e8ed486ced3cpcj (in /usr/local/bin/cargo)
==38953==    by 0x100042239: call_main_without_stdin::h973526862021846398 (in /usr/local/bin/cargo)
==38953==    by 0x10000BD74: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==    by 0x100001C86: main::h86f1470dea54a8b6jca (in /usr/local/bin/cargo)
==38953==    by 0x1003B97C8: rust_try_inner (in /usr/local/bin/cargo)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x10010AF67: ops::cargo_read_manifest::walk::h14038966357734740614 (in /usr/local/bin/cargo)
==38953==    by 0x10010B743: ops::cargo_read_manifest::walk::h14038966357734740614 (in /usr/local/bin/cargo)
==38953==    by 0x100109929: ops::cargo_read_manifest::read_packages::h387dbe9f6b94c3ae7Yi (in /usr/local/bin/cargo)
==38953==    by 0x1001A8817: sources::path::PathSource$LT$$u27$a$C$$u20$$u27$b$GT$::read_packages::ha076dd41b670c48aoTo (in /usr/local/bin/cargo)
==38953==    by 0x10010F8DE: ops::cargo_run::run::h5ac0e8ed486ced3cpcj (in /usr/local/bin/cargo)
==38953==    by 0x100042239: call_main_without_stdin::h973526862021846398 (in /usr/local/bin/cargo)
==38953==    by 0x10000BD74: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==    by 0x100001C86: main::h86f1470dea54a8b6jca (in /usr/local/bin/cargo)
==38953==    by 0x1003B97C8: rust_try_inner (in /usr/local/bin/cargo)
==38953==    by 0x100001153: (below main) (in /usr/local/bin/cargo)
==38953==
==38953== Conditional jump or move depends on uninitialised value(s)
==38953==    at 0x100154BB7: sync::mpsc::Receiver$LT$T$GT$::recv::h14442584173272513779 (in /usr/local/bin/cargo)
==38953==    by 0x1000D548B: ops::cargo_rustc::compile_targets::h9ebb5b9ff3dac5495sm (in /usr/local/bin/cargo)
==38953==    by 0x1000CDDE7: ops::cargo_compile::compile_pkg::hd80992372d69bc10moh (in /usr/local/bin/cargo)
==38953==    by 0x1000C9FB2: ops::cargo_compile::compile::h6b88dcd9dad61919ujh (in /usr/local/bin/cargo)
==38953==    by 0x10010FE16: ops::cargo_run::run::h5ac0e8ed486ced3cpcj (in /usr/local/bin/cargo)
==38953==    by 0x100042239: call_main_without_stdin::h973526862021846398 (in /usr/local/bin/cargo)
==38953==    by 0x10000BD74: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38953==    by 0x1000044A8: call_main_without_stdin::h17603844962363947862 (in /usr/local/bin/cargo)
==38953==    by 0x100001C86: main::h86f1470dea54a8b6jca (in /usr/local/bin/cargo)
==38953==    by 0x1003B97C8: rust_try_inner (in /usr/local/bin/cargo)
==38953==    by 0x100001153: (below main) (in /usr/local/bin/cargo)
==38953==
     Running `target/debug/HelloWorld`
==38956== Use of uninitialised value of size 8
==38956==    at 0x100C81243: _platform_strchr$VARIANT$Haswell (in /usr/lib/system/libsystem_platform.dylib)
==38956==    by 0x100A99F8D: setenv (in /usr/lib/system/libsystem_c.dylib)
==38956==    by 0x100CF5B6E: xpc_atfork_child (in /usr/lib/system/libxpc.dylib)
==38956==    by 0x100895BAE: libSystem_atfork_child (in /usr/lib/libSystem.B.dylib)
==38956==    by 0x100A460A7: fork (in /usr/lib/system/libsystem_c.dylib)
==38956==    by 0x1003B43B8: sys::process2::Process::spawn::closure.45931 (in /usr/local/bin/cargo)
==38956==    by 0x1003A22BF: process::Command::spawn_inner::h2fa76f53fa0cc19aW2s (in /usr/local/bin/cargo)
==38956==    by 0x1003A4D48: process::Command::status::h464c86ef9b14dce8M5s (in /usr/local/bin/cargo)
==38956==    by 0x100113A44: util::process_builder::ProcessBuilder::exec::h38267657747e65a4act (in /usr/local/bin/cargo)
==38956==    by 0x100110EA3: ops::cargo_run::run::h5ac0e8ed486ced3cpcj (in /usr/local/bin/cargo)
==38956==    by 0x100042239: call_main_without_stdin::h973526862021846398 (in /usr/local/bin/cargo)
==38956==    by 0x10000BD74: execute::h0201643256249e00vca (in /usr/local/bin/cargo)
==38956==
==38953==
==38953== HEAP SUMMARY:
==38953==     in use at exit: 544,938 bytes in 3,773 blocks
==38953==   total heap usage: 30,387 allocs, 26,614 frees, 6,629,792 bytes allocated
==38953==
==38953== LEAK SUMMARY:
==38953==    definitely lost: 4,093 bytes in 53 blocks
==38953==    indirectly lost: 66,032 bytes in 2,169 blocks
==38953==      possibly lost: 15,200 bytes in 129 blocks
==38953==    still reachable: 96,224 bytes in 653 blocks
==38953==         suppressed: 363,389 bytes in 769 blocks
==38953== Rerun with --leak-check=full to see details of leaked memory
==38953==
==38953== For counts of detected and suppressed errors, rerun with: -v
==38953== Use --track-origins=yes to see where uninitialised values come from
==38953== ERROR SUMMARY: 158 errors from 14 contexts (suppressed: 0 from 0)
../valgrind-trunk/Inst/bin/valgrind cargo run  5.34s user 0.71s system 94% cpu 6.396 total

Something really bad is going on, guys...
@alexcrichton
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Optimized code is known to generate valgrind errors, which could be the root cause of all the errors that you're seeing. Without a segfault happening I'm a little wary to say whether or not these errors are false positives or not.

@aspcartman
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Oh. Thanks. That's an odd thing to know.

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@alexcrichton @aspcartman