Conan: [REGRESSION][1.13.0] Transitive dependency info not generated

[AlexandreBossard]

Hello,

We have tried to upgrade conan 1.13.0 from 1.12.3, but some packages do not build anymore. We managed to reproduce with a small example:
conan-graph-bug.zip
The steps to reproduce are in the README.md contained in the zip file.

To help us debug your issue please explain:

• [x] I've read the CONTRIBUTING guide.
• [x] I've specified the Conan version, operating system version and any tool that can be relevant.
• [x] I've explained the steps to reproduce the error or the motivation/use case of the question/suggestion.

[jgsogo]

Hi @AlexandreBossard

I'm running your example and it works in my machine (Macos)... building CCCC during the conan create ./D alex/dev --build=missing call works for me:

BBBB/1.0@alex/dev: Package '673e4db12110c30cae39f84e0cd3697bf851c7be' created
CCCC/1.0@alex/dev: Building your package in /Users/jgsogo/.conan/data/CCCC/1.0/alex/dev/build/aa2ee6f6aafa59f9c1c5bab1cc476c068105c789
CCCC/1.0@alex/dev: Copying sources to build folder
CCCC/1.0@alex/dev: Generator cmake created conanbuildinfo.cmake
CCCC/1.0@alex/dev: Calling build()
CCCC/1.0@alex/dev: WARN: This conanfile has no build step
CCCC/1.0@alex/dev: Package 'aa2ee6f6aafa59f9c1c5bab1cc476c068105c789' built
CCCC/1.0@alex/dev: Build folder /Users/jgsogo/.conan/data/CCCC/1.0/alex/dev/build/aa2ee6f6aafa59f9c1c5bab1cc476c068105c789
CCCC/1.0@alex/dev: Generated conaninfo.txt
CCCC/1.0@alex/dev: Generated conanbuildinfo.txt
CCCC/1.0@alex/dev: Generating the package
CCCC/1.0@alex/dev: Package folder /Users/jgsogo/.conan/data/CCCC/1.0/alex/dev/package/aa2ee6f6aafa59f9c1c5bab1cc476c068105c789
CCCC/1.0@alex/dev: Calling package()
CCCC/1.0@alex/dev: WARN: This conanfile has no package step
CCCC/1.0@alex/dev package(): WARN: No files in this package!
CCCC/1.0@alex/dev: Package 'aa2ee6f6aafa59f9c1c5bab1cc476c068105c789' created
DDDD/1.0@alex/dev: Building your package in /Users/jgsogo/.conan/data/DDDD/1.0/alex/dev/build/e820f45a2e863a5e982f85a6f5f4d62f3348e8f8

...and there is _no diff_ between your file borken.cmake and my conanbuildinfo.cmake:

diff --git a/Users/jgsogo/.conan/data/CCCC/1.0/alex/dev/build/aa2ee6f6aafa59f9c1c5bab1cc476c068105c789/conanbuildinfo.cmake b/../issues/conan-graph-bug/borken.cmake
index 36e11580..c296c3a3 100644
--- a/Users/jgsogo/.conan/data/CCCC/1.0/alex/dev/build/aa2ee6f6aafa59f9c1c5bab1cc476c068105c789/conanbuildinfo.cmake
+++ b/../issues/conan-graph-bug/borken.cmake
@@ -1,11 +1,11 @@
 include(CMakeParseArguments)
-set(CONAN_BBBB_ROOT "/Users/jgsogo/.conan/data/BBBB/1.0/alex/dev/package/673e4db12110c30cae39f84e0cd3697bf851c7be")
+set(CONAN_BBBB_ROOT "/home/alexandre/.conan/data/BBBB/1.0/alex/dev/package/c94f6ef29731b7eef20fe61dc15251bec62ebcd4")
 set(CONAN_INCLUDE_DIRS_BBBB )
 set(CONAN_LIB_DIRS_BBBB )
 set(CONAN_BIN_DIRS_BBBB )
 set(CONAN_RES_DIRS_BBBB )
 set(CONAN_SRC_DIRS_BBBB )
-set(CONAN_BUILD_DIRS_BBBB "/Users/jgsogo/.conan/data/BBBB/1.0/alex/dev/package/673e4db12110c30cae39f84e0cd3697bf851c7be/")
+set(CONAN_BUILD_DIRS_BBBB "/home/alexandre/.conan/data/BBBB/1.0/alex/dev/package/c94f6ef29731b7eef20fe61dc15251bec62ebcd4/")
 set(CONAN_LIBS_BBBB )
 set(CONAN_DEFINES_BBBB )
 # COMPILE_DEFINITIONS are equal to CONAN_DEFINES without -D, for targets
@@ -31,10 +31,10 @@ set(CONAN_PACKAGE_VERSION 1.0)

 set(CONAN_SETTINGS_ARCH "x86_64")
 set(CONAN_SETTINGS_BUILD_TYPE "Release")
-set(CONAN_SETTINGS_COMPILER "apple-clang")
-set(CONAN_SETTINGS_COMPILER_LIBCXX "libc++")
-set(CONAN_SETTINGS_COMPILER_VERSION "10.0")
-set(CONAN_SETTINGS_OS "Macos")
+set(CONAN_SETTINGS_COMPILER "gcc")
+set(CONAN_SETTINGS_COMPILER_LIBCXX "libstdc++11")
+set(CONAN_SETTINGS_COMPILER_VERSION "8")
+set(CONAN_SETTINGS_OS "Linux")

 set(CONAN_DEPENDENCIES BBBB)
 # Storing original command line args (CMake helper) flags
@@ -50,7 +50,7 @@ set(CONAN_BIN_DIRS  ${CONAN_BIN_DIRS})
 set(CONAN_RES_DIRS  ${CONAN_RES_DIRS})
 set(CONAN_LIBS  ${CONAN_LIBS})
 set(CONAN_DEFINES  ${CONAN_DEFINES})
-set(CONAN_CMAKE_MODULE_PATH "/Users/jgsogo/.conan/data/BBBB/1.0/alex/dev/package/673e4db12110c30cae39f84e0cd3697bf851c7be/" ${CONAN_CMAKE_MODULE_PATH})
+set(CONAN_CMAKE_MODULE_PATH "/home/alexandre/.conan/data/BBBB/1.0/alex/dev/package/c94f6ef29731b7eef20fe61dc15251bec62ebcd4/" ${CONAN_CMAKE_MODULE_PATH})

 set(CONAN_CXX_FLAGS " ${CONAN_CXX_FLAGS}")
 set(CONAN_SHARED_LINKER_FLAGS " ${CONAN_SHARED_LINKER_FLAGS}")

I think I need more information, can I see the output error?

[theodelrieu]

Hi Javier,

We should have pointed out what the problem is. Basically, the info about AAAA are not present in the borken.cmake, whereas it should be since it is a transitive dependency of BBBB.

[jgsogo]

I see, it looks like that information is missing. I'm digging into the code to investigate it but it looks like a bug

[jgsogo]

Hi @theodelrieu and @AlexandreBossard, I've reproduced the BUG in a test in #4733: the order of requires is affecting the graph.

If you change them in DDDD to requires = "CCCC", "AAAA" it will work. Of course this is not a solution and we will fix it, it is under investigation 🔬

Thanks for reporting it!

[AlexandreBossard]

I applied your workaround to our codebase, it worked! We will wait for a conan fix though. Thanks for your quick response.

[keithrob91]

We've hit this problem as well. Looking forward to a fix.

[memsharded]

I have proposed añother fix in #4737, that would cover also another possible extra case. If you could please also test it, that would help a lot.

We will try to release a Conan 1.13.1 minor as soon as possible, thanks very much for reporting.

[AlexandreBossard]

Checkout your branch and installed conan 1.13.1, seems to work for us! Thank you very much.

[lasote]

1.13.1 released, please report again if something still fails.